Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Additional Information (Detail)

v2.4.0.8
Real Estate and Intangible Assets - Additional Information (Detail) (USD $)
0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 9 Months Ended
Jul. 07, 2014
Jun. 11, 2014
Sep. 30, 2014
Property
Sep. 30, 2013
Sep. 30, 2014
Concord Township, Ohio [Member]
Sep. 30, 2014
Newburyport, Massachusetts [Member]
Jun. 11, 2014
Burnsville, MN [Member]
Sep. 30, 2014
Burnsville, MN [Member]
May 06, 2014
Austin, Texas [Member]
Sep. 30, 2014
Austin, Texas [Member]
Sep. 30, 2014
San Antonio, Texas [Member]
Sep. 30, 2014
2014 Real Estate Activity [Member]
Property
Sep. 30, 2013
2013 Real Estate Activity [Member]
Property
Real Estate Properties [Line Items]                          
Number of properties acquired     8                 8 5
Number of properties expanded                         1
Lease expiration date           Apr. 30, 2015              
Option to extend lease term                 8 years        
Original lease expiration 2015-03               2015-06        
Extended lease expiration 2020-03               2022-06        
Amount of annualized straight line rents over the life of the lease                 $ 700,000        
Leasing commissions paid 200,000   898,000 1,008,000       500,000   200,000      
Tenant improvements payable     3,300,000             1,300,000      
Extended additional period of lease   3 years         8 years            
Extended lease expiration date             2023-01            
Lease expiration period, month and year     2016-11 2021-08     2015-06            
Annualized straight line rent escalations             1,000,000            
Annual increase in lease rental   14.00%                      
Annualized straight line rent escalations 600,000                        
Amount paid for tenant improvements $ 900,000                        
Modified lease payment description         The lease covering this property was adjusted to defer a portion of rental payments covering the period August 2014 through December 2014. The tenant will repay the deferred rent balance monthly during calendar year 2015.         The leases covering these respective properties were adjusted to defer rental payments covering the period September 1, 2014 through November 30, 2014. The leases covering these respective properties were adjusted to defer rental payments covering the period September 1, 2014 through November 30, 2014.