Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation (Detail)

v3.20.4
Schedule III - Real Estate and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 459,838      
Land, initial cost 142,993      
Buildings & improvements, initial cost 925,501      
Improvement costs capitalized subsequent to acquisition 71,711      
Land, total cost 144,269      
Buildings & improvements, total cost 995,936      
Total 1,140,205 $ 1,064,389 $ 949,822 $ 906,850
Accumulated depreciation 231,876 $ 210,944 $ 178,475 $ 153,387
Net real estate $ 908,329      
Year construction/improvements one 2018      
Raleigh, North Carolina Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 960      
Buildings & improvements, initial cost 4,481      
Improvement costs capitalized subsequent to acquisition 1,039      
Land, total cost 960      
Buildings & improvements, total cost 5,520      
Total 6,480      
Accumulated depreciation 2,409      
Net real estate $ 4,071      
Year construction/ improvements 1997      
Date acquired Dec. 23, 2003      
Canton, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 186      
Buildings & improvements, initial cost 3,083      
Improvement costs capitalized subsequent to acquisition 500      
Land, total cost 187      
Buildings & improvements, total cost 3,582      
Total 3,769      
Accumulated depreciation 1,658      
Net real estate $ 2,111      
Year construction/ improvements 1994      
Date acquired Jan. 30, 2004      
Akron, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,973      
Buildings & improvements, initial cost 6,771      
Improvement costs capitalized subsequent to acquisition 3,107      
Land, total cost 1,974      
Buildings & improvements, total cost 9,877      
Total 11,851      
Accumulated depreciation 3,653      
Net real estate $ 8,198      
Year construction/ improvements 1968      
Year construction/improvements one 1999      
Date acquired Apr. 29, 2004      
Canton, North Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,123      
Land, initial cost 150      
Buildings & improvements, initial cost 5,050      
Improvement costs capitalized subsequent to acquisition 7,285      
Land, total cost 150      
Buildings & improvements, total cost 12,335      
Total 12,485      
Accumulated depreciation 3,298      
Net real estate $ 9,187      
Year construction/ improvements 1998      
Year construction/improvements one 2014      
Date acquired Jul. 06, 2004      
Crenshaw, Pennsylvania Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 100      
Buildings & improvements, initial cost 6,574      
Improvement costs capitalized subsequent to acquisition 269      
Land, total cost 100      
Buildings & improvements, total cost 6,843      
Total 6,943      
Accumulated depreciation 2,903      
Net real estate $ 4,040      
Year construction/ improvements 1991      
Date acquired Aug. 05, 2004      
Lexington, North Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 820      
Buildings & improvements, initial cost 2,107      
Improvement costs capitalized subsequent to acquisition 69      
Land, total cost 820      
Buildings & improvements, total cost 2,176      
Total 2,996      
Accumulated depreciation 954      
Net real estate $ 2,042      
Year construction/ improvements 1986      
Date acquired Aug. 05, 2004      
Mt. Pocono, Pennsylvania Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 350      
Buildings & improvements, initial cost 5,819      
Improvement costs capitalized subsequent to acquisition 18      
Land, total cost 350      
Buildings & improvements, total cost 5,837      
Total 6,187      
Accumulated depreciation 2,463      
Net real estate $ 3,724      
Year construction/ improvements 1995      
Year construction/improvements one 1999      
Date acquired Oct. 15, 2004      
San Antonio, Texas Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 843      
Buildings & improvements, initial cost 7,514      
Improvement costs capitalized subsequent to acquisition 2,240      
Land, total cost 843      
Buildings & improvements, total cost 9,754      
Total 10,597      
Accumulated depreciation 3,964      
Net real estate $ 6,633      
Year construction/ improvements 1999      
Date acquired Feb. 10, 2005      
Big Flats, New York Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,049      
Land, initial cost 275      
Buildings & improvements, initial cost 6,459      
Improvement costs capitalized subsequent to acquisition 515      
Land, total cost 275      
Buildings & improvements, total cost 6,974      
Total 7,249      
Accumulated depreciation 2,632      
Net real estate $ 4,617      
Year construction/ improvements 2001      
Date acquired Apr. 15, 2005      
Wichita, Kansas Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,525      
Buildings & improvements, initial cost 9,703      
Improvement costs capitalized subsequent to acquisition 327      
Land, total cost 1,525      
Buildings & improvements, total cost 10,030      
Total 11,555      
Accumulated depreciation 4,138      
Net real estate $ 7,417      
Year construction/ improvements 2000      
Date acquired May 18, 2005      
Eatontown, New Jersey Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,574      
Land, initial cost 1,351      
Buildings & improvements, initial cost 3,520      
Improvement costs capitalized subsequent to acquisition 534      
Land, total cost 1,351      
Buildings & improvements, total cost 4,054      
Total 5,405      
Accumulated depreciation 1,700      
Net real estate $ 3,705      
Year construction/ improvements 1991      
Date acquired Jul. 07, 2005      
Duncan, South Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 783      
Buildings & improvements, initial cost 10,790      
Improvement costs capitalized subsequent to acquisition 1,889      
Land, total cost 783      
Buildings & improvements, total cost 12,679      
Total 13,462      
Accumulated depreciation 4,919      
Net real estate $ 8,543      
Year construction/ improvements 1984      
Year construction/improvements one 2001      
Year construction/improvements two 2007      
Date acquired Jul. 14, 2005      
Duncan, South Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 195      
Buildings & improvements, initial cost 2,682      
Improvement costs capitalized subsequent to acquisition 470      
Land, total cost 195      
Buildings & improvements, total cost 3,152      
Total 3,347      
Accumulated depreciation 1,223      
Net real estate $ 2,124      
Year construction/ improvements 1984      
Year construction/improvements one 2001      
Year construction/improvements two 2007      
Date acquired Jul. 14, 2005      
Clintonville, Wisconsin Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 55      
Buildings & improvements, initial cost 4,717      
Improvement costs capitalized subsequent to acquisition 3,250      
Land, total cost 55      
Buildings & improvements, total cost 7,967      
Total 8,022      
Accumulated depreciation 2,665      
Net real estate $ 5,357      
Year construction/ improvements 1992      
Year construction/improvements one 2013      
Date acquired Oct. 31, 2005      
Richmond, Virginia Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 736      
Buildings & improvements, initial cost 5,336      
Improvement costs capitalized subsequent to acquisition 486      
Land, total cost 736      
Buildings & improvements, total cost 5,822      
Total 6,558      
Accumulated depreciation 2,207      
Net real estate $ 4,351      
Year construction/ improvements 1972      
Date acquired Dec. 30, 2005      
Champaign, Illinois Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 687      
Buildings & improvements, initial cost 2,036      
Improvement costs capitalized subsequent to acquisition (1,057)      
Land, total cost 326      
Buildings & improvements, total cost 1,340      
Total 1,666      
Accumulated depreciation 754      
Net real estate $ 912      
Year construction/ improvements 1996      
Date acquired Feb. 21, 2006      
Burnsville, Minnesota Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 7,764      
Land, initial cost 3,511      
Buildings & improvements, initial cost 8,746      
Improvement costs capitalized subsequent to acquisition 7,329      
Land, total cost 3,511      
Buildings & improvements, total cost 16,075      
Total 19,586      
Accumulated depreciation 6,654      
Net real estate $ 12,932      
Year construction/ improvements 1984      
Date acquired May 10, 2006      
Menomonee Falls, Wisconsin Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 625      
Buildings & improvements, initial cost 6,911      
Improvement costs capitalized subsequent to acquisition 686      
Land, total cost 625      
Buildings & improvements, total cost 7,597      
Total 8,222      
Accumulated depreciation 2,914      
Net real estate $ 5,308      
Year construction/ improvements 1986      
Year construction/improvements one 2000      
Date acquired Jun. 30, 2006      
Baytown, Texas Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 221      
Buildings & improvements, initial cost 2,443      
Improvement costs capitalized subsequent to acquisition 2,478      
Land, total cost 221      
Buildings & improvements, total cost 4,921      
Total 5,142      
Accumulated depreciation 1,931      
Net real estate $ 3,211      
Year construction/ improvements 1997      
Date acquired Jul. 11, 2006      
Mason, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,560      
Land, initial cost 797      
Buildings & improvements, initial cost 6,258      
Improvement costs capitalized subsequent to acquisition 725      
Land, total cost 797      
Buildings & improvements, total cost 6,983      
Total 7,780      
Accumulated depreciation 2,792      
Net real estate $ 4,988      
Year construction/ improvements 2002      
Date acquired Jan. 05, 2007      
Raleigh, North Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,606      
Buildings & improvements, initial cost 5,513      
Improvement costs capitalized subsequent to acquisition 4,148      
Land, total cost 1,606      
Buildings & improvements, total cost 9,661      
Total 11,267      
Accumulated depreciation 3,576      
Net real estate $ 7,691      
Year construction/ improvements 1994      
Date acquired Feb. 16, 2007      
Tulsa, Oklahoma Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 0      
Buildings & improvements, initial cost 14,057      
Improvement costs capitalized subsequent to acquisition 548      
Land, total cost 0      
Buildings & improvements, total cost 14,605      
Total 14,605      
Accumulated depreciation 5,872      
Net real estate $ 8,733      
Year construction/ improvements 2004      
Date acquired Mar. 01, 2007      
Hialeah, Florida Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 3,562      
Buildings & improvements, initial cost 6,672      
Improvement costs capitalized subsequent to acquisition 769      
Land, total cost 3,562      
Buildings & improvements, total cost 7,441      
Total 11,003      
Accumulated depreciation 2,697      
Net real estate $ 8,306      
Year construction/ improvements 1956      
Year construction/improvements one 1992      
Date acquired Mar. 09, 2007      
Mason, Ohio Retail Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,201      
Buildings & improvements, initial cost 4,961      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,201      
Buildings & improvements, total cost 4,961      
Total 6,162      
Accumulated depreciation 1,749      
Net real estate $ 4,413      
Year construction/ improvements 2007      
Date acquired Jul. 01, 2007      
Cicero, New York Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 299      
Buildings & improvements, initial cost 5,019      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 299      
Buildings & improvements, total cost 5,019      
Total 5,318      
Accumulated depreciation 1,714      
Net real estate $ 3,604      
Year construction/ improvements 2005      
Date acquired Sep. 06, 2007      
Grand Rapids, Michigan Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,886      
Land, initial cost 1,629      
Buildings & improvements, initial cost 10,500      
Improvement costs capitalized subsequent to acquisition 308      
Land, total cost 1,629      
Buildings & improvements, total cost 10,808      
Total 12,437      
Accumulated depreciation 3,819      
Net real estate $ 8,618      
Year construction/ improvements 2001      
Date acquired Sep. 28, 2007      
Bollingbrook, Illinois Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,272      
Buildings & improvements, initial cost 5,003      
Improvement costs capitalized subsequent to acquisition 991      
Land, total cost 1,272      
Buildings & improvements, total cost 5,994      
Total 7,266      
Accumulated depreciation 2,287      
Net real estate $ 4,979      
Year construction/ improvements 2002      
Date acquired Sep. 28, 2007      
Decatur, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 783      
Buildings & improvements, initial cost 3,241      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 783      
Buildings & improvements, total cost 3,241      
Total 4,024      
Accumulated depreciation 1,140      
Net real estate $ 2,884      
Year construction/ improvements 1989      
Date acquired Dec. 13, 2007      
Decatur, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 205      
Buildings & improvements, initial cost 847      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 205      
Buildings & improvements, total cost 847      
Total 1,052      
Accumulated depreciation 298      
Net real estate $ 754      
Year construction/ improvements 1989      
Date acquired Dec. 13, 2007      
Decatur, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 257      
Buildings & improvements, initial cost 1,062      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 257      
Buildings & improvements, total cost 1,062      
Total 1,319      
Accumulated depreciation 374      
Net real estate $ 945      
Year construction/ improvements 1989      
Date acquired Dec. 13, 2007      
Lawrenceville, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 678      
Buildings & improvements, initial cost 2,807      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 678      
Buildings & improvements, total cost 2,807      
Total 3,485      
Accumulated depreciation 988      
Net real estate $ 2,497      
Year construction/ improvements 2005      
Date acquired Dec. 13, 2007      
Snellville, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 176      
Buildings & improvements, initial cost 727      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 176      
Buildings & improvements, total cost 727      
Total 903      
Accumulated depreciation 256      
Net real estate $ 647      
Year construction/ improvements 1986      
Date acquired Dec. 13, 2007      
Covington, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 232      
Buildings & improvements, initial cost 959      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 232      
Buildings & improvements, total cost 959      
Total 1,191      
Accumulated depreciation 338      
Net real estate $ 853      
Year construction/ improvements 2000      
Date acquired Dec. 13, 2007      
Conyers Georgia Office Building [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 296      
Buildings & improvements, initial cost 1,228      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 296      
Buildings & improvements, total cost 1,228      
Total 1,524      
Accumulated depreciation 432      
Net real estate $ 1,092      
Year construction/ improvements 1994      
Date acquired Dec. 13, 2007      
Cumming, Georgia Medical Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,634      
Land, initial cost 738      
Buildings & improvements, initial cost 3,055      
Improvement costs capitalized subsequent to acquisition 2,524      
Land, total cost 741      
Buildings & improvements, total cost 5,576      
Total 6,317      
Accumulated depreciation 1,621      
Net real estate $ 4,696      
Year construction/ improvements 2004      
Date acquired Dec. 13, 2007      
Reading, Pennsylvania Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,337      
Land, initial cost 491      
Buildings & improvements, initial cost 6,202      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 491      
Buildings & improvements, total cost 6,202      
Total 6,693      
Accumulated depreciation 2,062      
Net real estate $ 4,631      
Year construction/ improvements 2007      
Date acquired Jan. 29, 2008      
Fridley, Minnesota Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,380      
Land, initial cost 1,354      
Buildings & improvements, initial cost 8,074      
Improvement costs capitalized subsequent to acquisition 1,768      
Land, total cost 1,383      
Buildings & improvements, total cost 9,813      
Total 11,196      
Accumulated depreciation 3,390      
Net real estate $ 7,806      
Year construction/ improvements 1985      
Year construction/improvements one 2006      
Date acquired Feb. 26, 2008      
Pineville, North Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 1,940      
Land, initial cost 669      
Buildings & improvements, initial cost 3,028      
Improvement costs capitalized subsequent to acquisition 293      
Land, total cost 669      
Buildings & improvements, total cost 3,321      
Total 3,990      
Accumulated depreciation 1,097      
Net real estate $ 2,893      
Year construction/ improvements 1985      
Date acquired Apr. 30, 2008      
Marietta, Ohio Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,734      
Land, initial cost 829      
Buildings & improvements, initial cost 6,607      
Improvement costs capitalized subsequent to acquisition 529      
Land, total cost 829      
Buildings & improvements, total cost 7,136      
Total 7,965      
Accumulated depreciation 2,265      
Net real estate $ 5,700      
Year construction/ improvements 1992      
Year construction/improvements one 2007      
Date acquired Aug. 29, 2008      
Chalfont, Pennsylvania Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,275      
Land, initial cost 1,249      
Buildings & improvements, initial cost 6,420      
Improvement costs capitalized subsequent to acquisition 854      
Land, total cost 1,249      
Buildings & improvements, total cost 7,274      
Total 8,523      
Accumulated depreciation 2,365      
Net real estate $ 6,158      
Year construction/ improvements 1987      
Date acquired Aug. 29, 2008      
Orange City, Iowa Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 5,353      
Land, initial cost 258      
Buildings & improvements, initial cost 5,861      
Improvement costs capitalized subsequent to acquisition 6      
Land, total cost 258      
Buildings & improvements, total cost 5,867      
Total 6,125      
Accumulated depreciation 1,843      
Net real estate $ 4,282      
Year construction/ improvements 1990      
Date acquired Dec. 15, 2010      
Hickory, North Carolina Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 5,728      
Land, initial cost 1,163      
Buildings & improvements, initial cost 6,605      
Improvement costs capitalized subsequent to acquisition 357      
Land, total cost 1,163      
Buildings & improvements, total cost 6,962      
Total 8,125      
Accumulated depreciation 2,911      
Net real estate $ 5,214      
Year construction/ improvements 2008      
Date acquired Apr. 04, 2011      
Springfield, Missouri Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,700      
Buildings & improvements, initial cost 12,038      
Improvement costs capitalized subsequent to acquisition 924      
Land, total cost 1,845      
Buildings & improvements, total cost 12,817      
Total 14,662      
Accumulated depreciation 3,600      
Net real estate $ 11,062      
Year construction/ improvements 2006      
Date acquired Jun. 20, 2011      
Boston Heights, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,263      
Land, initial cost 449      
Buildings & improvements, initial cost 3,010      
Improvement costs capitalized subsequent to acquisition 10      
Land, total cost 449      
Buildings & improvements, total cost 3,020      
Total 3,469      
Accumulated depreciation 1,145      
Net real estate $ 2,324      
Year construction/ improvements 2011      
Date acquired Oct. 20, 2011      
Parsippany, New Jersey Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,696      
Buildings & improvements, initial cost 7,077      
Improvement costs capitalized subsequent to acquisition 252      
Land, total cost 1,696      
Buildings & improvements, total cost 7,329      
Total 9,025      
Accumulated depreciation 2,454      
Net real estate $ 6,571      
Year construction/ improvements 1984      
Date acquired Oct. 28, 2011      
Dartmouth, Massachusetts Retail Location        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,304      
Land, initial cost 0      
Buildings & improvements, initial cost 4,236      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 0      
Buildings & improvements, total cost 4,236      
Total 4,236      
Accumulated depreciation 1,078      
Net real estate $ 3,158      
Year construction/ improvements 2011      
Date acquired Nov. 18, 2011      
Springfield, Missouri Retail Location        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 1,222      
Land, initial cost 0      
Buildings & improvements, initial cost 2,275      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 0      
Buildings & improvements, total cost 2,275      
Total 2,275      
Accumulated depreciation 742      
Net real estate $ 1,533      
Year construction/ improvements 2005      
Date acquired Dec. 13, 2011      
Pittsburgh, Pennsylvania Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,326      
Land, initial cost 281      
Buildings & improvements, initial cost 3,205      
Improvement costs capitalized subsequent to acquisition 743      
Land, total cost 281      
Buildings & improvements, total cost 3,948      
Total 4,229      
Accumulated depreciation 1,271      
Net real estate $ 2,958      
Year construction/ improvements 1968      
Date acquired Dec. 28, 2011      
Ashburn, Virginia Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 6,052      
Land, initial cost 706      
Buildings & improvements, initial cost 7,858      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 705      
Buildings & improvements, total cost 7,859      
Total 8,564      
Accumulated depreciation 2,314      
Net real estate $ 6,250      
Year construction/ improvements 2002      
Date acquired Jan. 25, 2012      
Ottumwa, Iowa Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,708      
Land, initial cost 212      
Buildings & improvements, initial cost 5,072      
Improvement costs capitalized subsequent to acquisition 310      
Land, total cost 212      
Buildings & improvements, total cost 5,382      
Total 5,594      
Accumulated depreciation 1,515      
Net real estate $ 4,079      
Year construction/ improvements 1970      
Date acquired May 30, 2012      
New Albany, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 6,908      
Land, initial cost 1,658      
Buildings & improvements, initial cost 8,746      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,658      
Buildings & improvements, total cost 8,746      
Total 10,404      
Accumulated depreciation 2,760      
Net real estate $ 7,644      
Year construction/ improvements 2007      
Date acquired Jun. 05, 2012      
Columbus, Georgia Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,779      
Land, initial cost 1,378      
Buildings & improvements, initial cost 4,520      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,378      
Buildings & improvements, total cost 4,520      
Total 5,898      
Accumulated depreciation 1,592      
Net real estate $ 4,306      
Year construction/ improvements 2012      
Date acquired Jun. 21, 2012      
Columbus, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 542      
Buildings & improvements, initial cost 2,453      
Improvement costs capitalized subsequent to acquisition 134      
Land, total cost 542      
Buildings & improvements, total cost 2,587      
Total 3,129      
Accumulated depreciation 993      
Net real estate $ 2,136      
Year construction/ improvements 1981      
Date acquired Jun. 28, 2012      
Jupiter, Florida Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,160      
Buildings & improvements, initial cost 11,994      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,160      
Buildings & improvements, total cost 11,994      
Total 13,154      
Accumulated depreciation 3,026      
Net real estate $ 10,128      
Year construction/ improvements 2011      
Date acquired Sep. 26, 2012      
Fort Worth, Texas Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 10,321      
Land, initial cost 963      
Buildings & improvements, initial cost 15,647      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 963      
Buildings & improvements, total cost 15,647      
Total 16,610      
Accumulated depreciation 3,881      
Net real estate $ 12,729      
Year construction/ improvements 2005      
Date acquired Nov. 08, 2012      
Columbia, South Carolina Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 14,890      
Land, initial cost 1,905      
Buildings & improvements, initial cost 20,648      
Improvement costs capitalized subsequent to acquisition 438      
Land, total cost 1,905      
Buildings & improvements, total cost 21,086      
Total 22,991      
Accumulated depreciation 7,224      
Net real estate $ 15,767      
Year construction/ improvements 2010      
Date acquired Nov. 21, 2012      
Egg Harbor, New Jersey Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,949      
Land, initial cost 1,627      
Buildings & improvements, initial cost 3,017      
Improvement costs capitalized subsequent to acquisition 315      
Land, total cost 1,627      
Buildings & improvements, total cost 3,332      
Total 4,959      
Accumulated depreciation 964      
Net real estate $ 3,995      
Year construction/ improvements 1985      
Date acquired Mar. 28, 2013      
Vance, Alabama Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 457      
Buildings & improvements, initial cost 10,529      
Improvement costs capitalized subsequent to acquisition 6,692      
Land, total cost 457      
Buildings & improvements, total cost 17,221      
Total 17,678      
Accumulated depreciation 3,440      
Net real estate $ 14,238      
Year construction/ improvements 2013      
Date acquired May 09, 2013      
Blaine, Minnesota Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 7,193      
Land, initial cost 1,060      
Buildings & improvements, initial cost 10,518      
Improvement costs capitalized subsequent to acquisition (1,702)      
Land, total cost 842      
Buildings & improvements, total cost 9,034      
Total 9,876      
Accumulated depreciation 3,327      
Net real estate $ 6,549      
Year construction/ improvements 2009      
Date acquired May 10, 2013      
Austin, Texas Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 30,827      
Land, initial cost 2,330      
Buildings & improvements, initial cost 44,021      
Improvement costs capitalized subsequent to acquisition 134      
Land, total cost 2,330      
Buildings & improvements, total cost 44,155      
Total 46,485      
Accumulated depreciation 16,922      
Net real estate $ 29,563      
Year construction/ improvements 1999      
Date acquired Jul. 09, 2013      
Allen, Texas Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 7,620      
Land, initial cost 2,699      
Buildings & improvements, initial cost 7,945      
Improvement costs capitalized subsequent to acquisition 1,467      
Land, total cost 2,699      
Buildings & improvements, total cost 9,412      
Total 12,111      
Accumulated depreciation 3,357      
Net real estate $ 8,754      
Year construction/ improvements 1998      
Date acquired Jul. 10, 2013      
Englewood, Colorado Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,503      
Buildings & improvements, initial cost 11,739      
Improvement costs capitalized subsequent to acquisition 208      
Land, total cost 1,503      
Buildings & improvements, total cost 11,947      
Total 13,450      
Accumulated depreciation 3,652      
Net real estate $ 9,798      
Year construction/ improvements 2008      
Date acquired Dec. 11, 2013      
Novi, Michigan Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,701      
Land, initial cost 352      
Buildings & improvements, initial cost 5,626      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 352      
Buildings & improvements, total cost 5,626      
Total 5,978      
Accumulated depreciation 1,365      
Net real estate $ 4,613      
Year construction/ improvements 1988      
Date acquired Dec. 27, 2013      
Allen, Texas Retail Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,728      
Land, initial cost 874      
Buildings & improvements, initial cost 3,634      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 874      
Buildings & improvements, total cost 3,634      
Total 4,508      
Accumulated depreciation 849      
Net real estate $ 3,659      
Year construction/ improvements 2004      
Date acquired Mar. 27, 2014      
Colleyville, Texas Retail Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,518      
Land, initial cost 1,277      
Buildings & improvements, initial cost 2,424      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,277      
Buildings & improvements, total cost 2,424      
Total 3,701      
Accumulated depreciation 591      
Net real estate $ 3,110      
Year construction/ improvements 2000      
Date acquired Mar. 27, 2014      
Rancho Cordova, California Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,486      
Land, initial cost 752      
Buildings & improvements, initial cost 6,176      
Improvement costs capitalized subsequent to acquisition (541)      
Land, total cost 641      
Buildings & improvements, total cost 5,746      
Total 6,387      
Accumulated depreciation 1,509      
Net real estate $ 4,878      
Year construction/ improvements 1986      
Date acquired Apr. 22, 2014      
Coppell, Texas Retail Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,900      
Land, initial cost 1,448      
Buildings & improvements, initial cost 3,349      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,448      
Buildings & improvements, total cost 3,349      
Total 4,797      
Accumulated depreciation 765      
Net real estate $ 4,032      
Year construction/ improvements 2005      
Date acquired May 08, 2014      
Columbus, Ohio (3) Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 990      
Buildings & improvements, initial cost 8,017      
Improvement costs capitalized subsequent to acquisition 2,860      
Land, total cost 990      
Buildings & improvements, total cost 10,877      
Total 11,867      
Accumulated depreciation 3,058      
Net real estate $ 8,809      
Year construction/ improvements 1986      
Date acquired May 13, 2014      
Taylor, Pennsylvania Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 21,600      
Land, initial cost 3,101      
Buildings & improvements, initial cost 25,405      
Improvement costs capitalized subsequent to acquisition 1,248      
Land, total cost 3,101      
Buildings & improvements, total cost 26,653      
Total 29,754      
Accumulated depreciation 5,283      
Net real estate $ 24,471      
Year construction/ improvements 2000      
Year construction/improvements one 2006      
Date acquired Jun. 09, 2014      
Aurora, Colorado Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 2,882      
Buildings & improvements, initial cost 3,917      
Improvement costs capitalized subsequent to acquisition 96      
Land, total cost 2,882      
Buildings & improvements, total cost 4,013      
Total 6,895      
Accumulated depreciation 1,028      
Net real estate $ 5,867      
Year construction/ improvements 1983      
Date acquired Jul. 01, 2014      
Indianapolis, Indiana Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 5,455      
Land, initial cost 502      
Buildings & improvements, initial cost 6,422      
Improvement costs capitalized subsequent to acquisition 1,859      
Land, total cost 498      
Buildings & improvements, total cost 8,285      
Total 8,783      
Accumulated depreciation 2,152      
Net real estate $ 6,631      
Year construction/ improvements 1981      
Year construction/improvements one 2014      
Date acquired Sep. 03, 2014      
Denver, Colorado Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,621      
Buildings & improvements, initial cost 7,071      
Improvement costs capitalized subsequent to acquisition 243      
Land, total cost 1,621      
Buildings & improvements, total cost 7,314      
Total 8,935      
Accumulated depreciation 1,646      
Net real estate $ 7,289      
Year construction/ improvements 1985      
Date acquired Oct. 31, 2014      
Monroe, Michigan Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 9,632      
Land, initial cost 658      
Buildings & improvements, initial cost 14,607      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 657      
Buildings & improvements, total cost 14,608      
Total 15,265      
Accumulated depreciation 2,761      
Net real estate $ 12,504      
Year construction/ improvements 2004      
Date acquired Dec. 23, 2014      
Monroe, Michigan Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 6,742      
Land, initial cost 460      
Buildings & improvements, initial cost 10,225      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 460      
Buildings & improvements, total cost 10,225      
Total 10,685      
Accumulated depreciation 1,933      
Net real estate $ 8,752      
Year construction/ improvements 2004      
Date acquired Dec. 23, 2014      
Richardson, Texas Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 12,991      
Land, initial cost 2,728      
Buildings & improvements, initial cost 15,372      
Improvement costs capitalized subsequent to acquisition 1,135      
Land, total cost 2,728      
Buildings & improvements, total cost 16,507      
Total 19,235      
Accumulated depreciation 4,086      
Net real estate $ 15,149      
Year construction/ improvements 1985      
Year construction/improvements one 2008      
Date acquired Mar. 06, 2015      
Birmingham, Alabama Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 650      
Buildings & improvements, initial cost 2,034      
Improvement costs capitalized subsequent to acquisition 60      
Land, total cost 650      
Buildings & improvements, total cost 2,094      
Total 2,744      
Accumulated depreciation 567      
Net real estate $ 2,177      
Year construction/ improvements 1982      
Year construction/improvements one 2010      
Date acquired Mar. 20, 2015      
Dublin, Ohio Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,800      
Land, initial cost 1,338      
Buildings & improvements, initial cost 5,058      
Improvement costs capitalized subsequent to acquisition 1,086      
Land, total cost 1,338      
Buildings & improvements, total cost 6,144      
Total 7,482      
Accumulated depreciation 1,374      
Net real estate $ 6,108      
Year construction/ improvements 1980      
Date acquired May 28, 2015      
Draper, Utah Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 11,930      
Land, initial cost 3,248      
Buildings & improvements, initial cost 13,129      
Improvement costs capitalized subsequent to acquisition 74      
Land, total cost 3,248      
Buildings & improvements, total cost 13,203      
Total 16,451      
Accumulated depreciation 2,998      
Net real estate $ 13,453      
Year construction/ improvements 2008      
Date acquired May 29, 2015      
Hapeville, Georgia Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 6,845      
Land, initial cost 2,272      
Buildings & improvements, initial cost 8,778      
Improvement costs capitalized subsequent to acquisition 263      
Land, total cost 2,272      
Buildings & improvements, total cost 9,041      
Total 11,313      
Accumulated depreciation 1,801      
Net real estate $ 9,512      
Year construction/ improvements 1999      
Year construction/improvements one 2007      
Date acquired Jul. 15, 2015      
Villa Rica, Georgia Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,477      
Land, initial cost 293      
Buildings & improvements, initial cost 5,277      
Improvement costs capitalized subsequent to acquisition 18      
Land, total cost 293      
Buildings & improvements, total cost 5,295      
Total 5,588      
Accumulated depreciation 1,030      
Net real estate $ 4,558      
Year construction/ improvements 2000      
Year construction/improvements one 2014      
Date acquired Oct. 20, 2015      
Taylorsville, Utah Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 8,867      
Land, initial cost 3,008      
Buildings & improvements, initial cost 10,659      
Improvement costs capitalized subsequent to acquisition 435      
Land, total cost 3,008      
Buildings & improvements, total cost 11,094      
Total 14,102      
Accumulated depreciation 2,703      
Net real estate $ 11,399      
Year construction/ improvements 1997      
Date acquired May 26, 2016      
Fort Lauderdale, Florida Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 12,625      
Land, initial cost 4,117      
Buildings & improvements, initial cost 15,516      
Improvement costs capitalized subsequent to acquisition 3,378      
Land, total cost 4,117      
Buildings & improvements, total cost 18,894      
Total 23,011      
Accumulated depreciation 3,664      
Net real estate $ 19,347      
Year construction/ improvements 1984      
Date acquired Sep. 12, 2016      
King of Prussia, Pennsylvania Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 14,401      
Land, initial cost 3,681      
Buildings & improvements, initial cost 15,739      
Improvement costs capitalized subsequent to acquisition 473      
Land, total cost 3,681      
Buildings & improvements, total cost 16,212      
Total 19,893      
Accumulated depreciation 2,918      
Net real estate $ 16,975      
Year construction/ improvements 2001      
Date acquired Dec. 14, 2016      
Conshohocken Pennsylvania Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 10,095      
Land, initial cost 1,996      
Buildings & improvements, initial cost 10,880      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,996      
Buildings & improvements, total cost 10,880      
Total 12,876      
Accumulated depreciation 1,532      
Net real estate $ 11,344      
Year construction/ improvements 1996      
Date acquired Jun. 22, 2017      
Philadelphia Pennsylvania, Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 14,924      
Land, initial cost 5,896      
Buildings & improvements, initial cost 16,282      
Improvement costs capitalized subsequent to acquisition 27      
Land, total cost 5,906      
Buildings & improvements, total cost 16,299      
Total 22,205      
Accumulated depreciation 2,669      
Net real estate $ 19,536      
Year construction/ improvements 1994      
Year construction/improvements one 2011      
Date acquired Jul. 07, 2017      
Maitland Florida Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 15,356      
Land, initial cost 3,073      
Buildings & improvements, initial cost 19,661      
Improvement costs capitalized subsequent to acquisition 431      
Land, total cost 3,091      
Buildings & improvements, total cost 20,074      
Total 23,165      
Accumulated depreciation 3,714      
Net real estate $ 19,451      
Year construction/ improvements 1998      
Date acquired Jul. 31, 2017      
Maitland Florida Office Building Three        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 7,699      
Land, initial cost 2,095      
Buildings & improvements, initial cost 9,339      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 2,095      
Buildings & improvements, total cost 9,339      
Total 11,434      
Accumulated depreciation 1,328      
Net real estate $ 10,106      
Year construction/ improvements 1999      
Date acquired Jul. 31, 2017      
Columbus Ohio Office Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 8,939      
Land, initial cost 1,926      
Buildings & improvements, initial cost 11,410      
Improvement costs capitalized subsequent to acquisition (1)      
Land, total cost 1,925      
Buildings & improvements, total cost 11,410      
Total 13,335      
Accumulated depreciation 1,723      
Net real estate $ 11,612      
Year construction/ improvements 2007      
Date acquired Dec. 01, 2017      
Salt Lake City Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 4,446      
Buildings & improvements, initial cost 9,938      
Improvement costs capitalized subsequent to acquisition 771      
Land, total cost 4,446      
Buildings & improvements, total cost 10,709      
Total 15,155      
Accumulated depreciation 1,606      
Net real estate $ 13,549      
Year construction/ improvements 2007      
Date acquired Dec. 01, 2017      
Vance, Alabama Industrial Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 459      
Buildings & improvements, initial cost 12,224      
Improvement costs capitalized subsequent to acquisition 44      
Land, total cost 469      
Buildings & improvements, total cost 12,258      
Total 12,727      
Accumulated depreciation 1,260      
Net real estate $ 11,467      
Year construction/ improvements 2018      
Date acquired Mar. 09, 2018      
Columbus, Ohio Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,524      
Land, initial cost 681      
Buildings & improvements, initial cost 6,401      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 681      
Buildings & improvements, total cost 6,401      
Total 7,082      
Accumulated depreciation 756      
Net real estate $ 6,326      
Year construction/ improvements 1990      
Date acquired Sep. 20, 2018      
Detroit, Michigan Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 6,389      
Land, initial cost 1,458      
Buildings & improvements, initial cost 10,092      
Improvement costs capitalized subsequent to acquisition 10      
Land, total cost 1,468      
Buildings & improvements, total cost 10,092      
Total 11,560      
Accumulated depreciation 793      
Net real estate $ 10,767      
Year construction/ improvements 1997      
Date acquired Oct. 30, 2018      
Detroit, Michigan Industrial Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 662      
Buildings & improvements, initial cost 6,681      
Improvement costs capitalized subsequent to acquisition 10      
Land, total cost 672      
Buildings & improvements, total cost 6,681      
Total 7,353      
Accumulated depreciation 534      
Net real estate $ 6,819      
Year construction/ improvements 2002      
Year construction/improvements one 2016      
Date acquired Oct. 30, 2018      
Lake Mary, Florida Office Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 10,316      
Land, initial cost 3,018      
Buildings & improvements, initial cost 11,756      
Improvement costs capitalized subsequent to acquisition 87      
Land, total cost 3,020      
Buildings & improvements, total cost 11,841      
Total 14,861      
Accumulated depreciation 1,023      
Net real estate $ 13,838      
Year construction/ improvements 1997      
Year construction/improvements one 2018      
Date acquired Dec. 27, 2018      
Moorestown, New Jersey Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 471      
Buildings & improvements, initial cost 1,825      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 471      
Buildings & improvements, total cost 1,825      
Total 2,296      
Accumulated depreciation 213      
Net real estate $ 2,083      
Year construction/ improvements 1991      
Date acquired Feb. 08, 2019      
Indianapolis, Indiana Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 255      
Buildings & improvements, initial cost 2,809      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 255      
Buildings & improvements, total cost 2,809      
Total 3,064      
Accumulated depreciation 203      
Net real estate $ 2,861      
Year construction/ improvements 1989      
Year construction/improvements one 2019      
Date acquired Feb. 28, 2019      
Ocala, Florida Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,286      
Buildings & improvements, initial cost 8,535      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,286      
Buildings & improvements, total cost 8,535      
Total 9,821      
Accumulated depreciation 505      
Net real estate $ 9,316      
Year construction/ improvements 2001      
Date acquired Apr. 05, 2019      
Ocala, Florida Industrial Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 725      
Buildings & improvements, initial cost 4,814      
Improvement costs capitalized subsequent to acquisition 253      
Land, total cost 725      
Buildings & improvements, total cost 5,067      
Total 5,792      
Accumulated depreciation 285      
Net real estate $ 5,507      
Year construction/ improvements 1965      
Year construction/improvements one 2007      
Date acquired Apr. 05, 2019      
Delaware, Ohio Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 316      
Buildings & improvements, initial cost 2,355      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 316      
Buildings & improvements, total cost 2,355      
Total 2,671      
Accumulated depreciation 165      
Net real estate $ 2,506      
Year construction/ improvements 2005      
Date acquired Apr. 30, 2019      
Tifton, Georgia Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 8,467      
Land, initial cost 0      
Buildings & improvements, initial cost 15,190      
Improvement costs capitalized subsequent to acquisition 1,725      
Land, total cost 1,725      
Buildings & improvements, total cost 15,190      
Total 16,915      
Accumulated depreciation 785      
Net real estate $ 16,130      
Year construction/ improvements 1995      
Year construction/improvements one 2003      
Date acquired Jun. 18, 2019      
Denton, Texas Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,497      
Buildings & improvements, initial cost 4,151      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,496      
Buildings & improvements, total cost 4,152      
Total 5,648      
Accumulated depreciation 262      
Net real estate $ 5,386      
Year construction/ improvements 2012      
Date acquired Jul. 30, 2019      
Temple, Texas Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 200      
Buildings & improvements, initial cost 4,335      
Improvement costs capitalized subsequent to acquisition 65      
Land, total cost 200      
Buildings & improvements, total cost 4,400      
Total 4,600      
Accumulated depreciation 225      
Net real estate $ 4,375      
Year construction/ improvements 1973      
Year construction/improvements one 2006      
Date acquired Sep. 26, 2019      
Temple, Texas Industrial Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 296      
Buildings & improvements, initial cost 6,425      
Improvement costs capitalized subsequent to acquisition 99      
Land, total cost 296      
Buildings & improvements, total cost 6,524      
Total 6,820      
Accumulated depreciation 334      
Net real estate $ 6,486      
Year construction/ improvements 1978      
Year construction/improvements one 2006      
Date acquired Sep. 26, 2019      
Indianapolis, Indiana Industrial Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 1,158      
Buildings & improvements, initial cost 5,162      
Improvement costs capitalized subsequent to acquisition 4      
Land, total cost 1,162      
Buildings & improvements, total cost 5,162      
Total 6,324      
Accumulated depreciation 354      
Net real estate $ 5,970      
Year construction/ improvements 1967      
Year construction/improvements one 1998      
Date acquired Nov. 14, 2019      
Jackson, Tennessee Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,656      
Land, initial cost 311      
Buildings & improvements, initial cost 7,199      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 311      
Buildings & improvements, total cost 7,199      
Total 7,510      
Accumulated depreciation 250      
Net real estate $ 7,260      
Year construction/ improvements 2019      
Date acquired Dec. 16, 2019      
Carrollton, Georgia Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 4,138      
Land, initial cost 291      
Buildings & improvements, initial cost 6,720      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 292      
Buildings & improvements, total cost 6,719      
Total 7,011      
Accumulated depreciation 225      
Net real estate $ 6,786      
Year construction/ improvements 2015      
Year construction/improvements one 2019      
Date acquired Dec. 17, 2019      
New Orleans, Louisiana Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,706      
Land, initial cost 2,168      
Buildings & improvements, initial cost 4,667      
Improvement costs capitalized subsequent to acquisition (2)      
Land, total cost 2,166      
Buildings & improvements, total cost 4,667      
Total 6,833      
Accumulated depreciation 256      
Net real estate $ 6,577      
Year construction/ improvements 1975      
Date acquired Dec. 17, 2019      
San Antonio, Texas Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,804      
Land, initial cost 775      
Buildings & improvements, initial cost 6,877      
Improvement costs capitalized subsequent to acquisition (2)      
Land, total cost 773      
Buildings & improvements, total cost 6,877      
Total 7,650      
Accumulated depreciation 268      
Net real estate $ 7,382      
Year construction/ improvements 1985      
Date acquired Dec. 17, 2019      
Port Allen, Louisiana Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,819      
Land, initial cost 292      
Buildings & improvements, initial cost 3,411      
Improvement costs capitalized subsequent to acquisition (2)      
Land, total cost 291      
Buildings & improvements, total cost 3,410      
Total 3,701      
Accumulated depreciation 168      
Net real estate $ 3,533      
Year construction/ improvements 1983      
Year construction/improvements one 2005      
Date acquired Dec. 17, 2019      
Albuquerque, New Mexico Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 1,824      
Land, initial cost 673      
Buildings & improvements, initial cost 2,291      
Improvement costs capitalized subsequent to acquisition (3)      
Land, total cost 671      
Buildings & improvements, total cost 2,290      
Total 2,961      
Accumulated depreciation 93      
Net real estate $ 2,868      
Year construction/ improvements 1998      
Year construction/improvements one 2017      
Date acquired Dec. 17, 2019      
Tucson, Arizona Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,414      
Land, initial cost 819      
Buildings & improvements, initial cost 4,636      
Improvement costs capitalized subsequent to acquisition (2)      
Land, total cost 817      
Buildings & improvements, total cost 4,636      
Total 5,453      
Accumulated depreciation 176      
Net real estate $ 5,277      
Year construction/ improvements 1987      
Year construction/improvements one 1995      
Year construction/improvements two 2005      
Date acquired Dec. 17, 2019      
Albuquerque, New Mexico Industrial Building Two        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 3,453      
Land, initial cost 818      
Buildings & improvements, initial cost 5,219      
Improvement costs capitalized subsequent to acquisition (4)      
Land, total cost 815      
Buildings & improvements, total cost 5,218      
Total 6,033      
Accumulated depreciation 195      
Net real estate $ 5,838      
Year construction/ improvements 2000      
Date acquired Dec. 17, 2019      
Indianapolis, Indiana Industrial Building Three        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 489      
Buildings & improvements, initial cost 3,956      
Improvement costs capitalized subsequent to acquisition 206      
Land, total cost 493      
Buildings & improvements, total cost 4,158      
Total 4,651      
Accumulated depreciation 137      
Net real estate $ 4,514      
Year construction/ improvements 1987      
Date acquired Jan. 08, 2020      
Houston, Texas Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 9,772      
Land, initial cost 1,714      
Buildings & improvements, initial cost 14,170      
Improvement costs capitalized subsequent to acquisition 3      
Land, total cost 1,717      
Buildings & improvements, total cost 14,170      
Total 15,887      
Accumulated depreciation 385      
Net real estate $ 15,502      
Year construction/ improvements 2000      
Year construction/improvements one 2018      
Date acquired Jan. 27, 2020      
Charlotte, North Carolina Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 5,279      
Land, initial cost 1,458      
Buildings & improvements, initial cost 6,778      
Improvement costs capitalized subsequent to acquisition 4      
Land, total cost 1,461      
Buildings & improvements, total cost 6,779      
Total 8,240      
Accumulated depreciation 234      
Net real estate $ 8,006      
Year construction/ improvements 1995      
Year construction/improvements one 1999      
Year construction/improvements two 2006      
Date acquired Jan. 27, 2020      
St. Charles, Missouri Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 2,920      
Land, initial cost 924      
Buildings & improvements, initial cost 3,749      
Improvement costs capitalized subsequent to acquisition 4      
Land, total cost 928      
Buildings & improvements, total cost 3,749      
Total 4,677      
Accumulated depreciation 105      
Net real estate $ 4,572      
Year construction/ improvements 2012      
Date acquired Jan. 27, 2020      
Crandall, Georgia Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 17,224      
Land, initial cost 2,711      
Buildings & improvements, initial cost 26,632      
Improvement costs capitalized subsequent to acquisition 115      
Land, total cost 2,711      
Buildings & improvements, total cost 26,747      
Total 29,458      
Accumulated depreciation 641      
Net real estate $ 28,817      
Year construction/ improvements 2020      
Date acquired Mar. 09, 2020      
Terre Haute, Indiana Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 502      
Buildings & improvements, initial cost 8,076      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 502      
Buildings & improvements, total cost 8,076      
Total 8,578      
Accumulated depreciation 81      
Net real estate $ 8,497      
Year construction/ improvements 2010      
Date acquired Sep. 01, 2020      
Montgomery, Alabama Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 0      
Land, initial cost 599      
Buildings & improvements, initial cost 11,290      
Improvement costs capitalized subsequent to acquisition 3      
Land, total cost 602      
Buildings & improvements, total cost 11,290      
Total 11,892      
Accumulated depreciation 96      
Net real estate $ 11,796      
Year construction/ improvements 1990      
Year construction/improvements one 1997      
Date acquired Oct. 14, 2020      
Huntsville, Alabama Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 10,348      
Land, initial cost 1,445      
Buildings & improvements, initial cost 15,040      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,445      
Buildings & improvements, total cost 15,040      
Total 16,485      
Accumulated depreciation 21      
Net real estate $ 16,464      
Year construction/ improvements 2001      
Date acquired Dec. 18, 2020      
Pittsburg, Pennsylvania Industrial Building        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances, initial cost $ 6,375      
Land, initial cost 1,422      
Buildings & improvements, initial cost 10,094      
Improvement costs capitalized subsequent to acquisition 0      
Land, total cost 1,422      
Buildings & improvements, total cost 10,094      
Total 11,516      
Accumulated depreciation 13      
Net real estate $ 11,503      
Year construction/ improvements 1994      
Date acquired Dec. 21, 2020