Annual report pursuant to Section 13 and 15(d)

Mortgage Notes Payable and Line of Credit - Additional Information (Detail)

v3.3.1.900
Mortgage Notes Payable and Line of Credit - Additional Information (Detail)
 12 Months Ended
Nov. 10, 2015
USD ($)
Oct. 05, 2015
USD ($)
Jul. 01, 2015
USD ($)
Jun. 29, 2015
USD ($)
Dec. 31, 2015
USD ($)
Property
Mortgages
Lenders
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Feb. 17, 2016
USD ($)
Aug. 31, 2013
USD ($)
Debt Instrument [Line Items]                  
Number of mortgage notes payable | Mortgages         44        
Number of properties collateralized in mortgage notes payable | Property         97        
Net book value of collateralized mortgage properties         $ 5,900,000        
Number of long-term mortgages issued | Mortgages         8        
Number of properties to issue collateralized mortgage notes payable | Property         10        
Libor rate         0.43%        
Principal repayments on mortgage notes payable         $ 66,714,000 $ 8,144,000 $ 16,407,000    
Hedge contract, cost         151,000 31,000      
Fair value of mortgage notes payable outstanding         463,400,000        
Line of credit facility, maximum borrowing capacity   $ 85,000,000     $ 150,000,000       $ 100,000,000
Line of credit, maturity date   2019-08              
Line of credit facility, percentage of extension fee on initial maturity         0.25%        
Number of lenders added | Lenders         3        
Cost for modification of the credit facility agreement         $ 500,000        
Borrowings under line of credit         $ 45,300,000 $ 43,300,000      
Line of credit at an interest rate         2.91%        
Letters of credit, outstanding         $ 3,900,000        
Weighted average interest rate on debt outstanding         4.75%        
Line of credit facility, maximum additional amount drawn               $ 19,300,000  
Interest Rate Cap [Member]                  
Debt Instrument [Line Items]                  
Hedge contract, maturity date Dec. 01, 2020   Jul. 01, 2018            
Hedge contract, interest rate description     We will receive payments from Synovus Bank if the one month LIBOR rate increases above 3.0%.            
Synovus Bank [Member] | Interest Rate Cap [Member]                  
Debt Instrument [Line Items]                  
Hedge contract, cost     $ 70,000            
First Niagara Bank [Member] | Interest Rate Cap [Member]                  
Debt Instrument [Line Items]                  
Hedge contract, cost $ 50,000                
Hedge contract, interest rate description We will receive payments from First Niagara Bank if the one month LIBOR rate increases above 3.0%.                
LIBOR [Member] | Interest Rate Cap [Member]                  
Debt Instrument [Line Items]                  
LIBOR Cap     3.00%            
LIBOR [Member] | First Niagara Bank [Member] | Interest Rate Cap [Member]                  
Debt Instrument [Line Items]                  
LIBOR Cap 3.00%                
5-Year Term Loan Facility [Member]                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity         $ 25,000,000        
Line of credit, maturity date         2020-10        
Line of credit facility, percentage of extension fee on initial maturity         0.05%        
Letter of Credit [Member]                  
Debt Instrument [Line Items]                  
Weighted average interest rate on debt outstanding         2.50%        
Mortgage Notes Payable [Member]                  
Debt Instrument [Line Items]                  
Number of properties collateralized in mortgage notes payable | Property         75        
Debt instrument stated percentage       5.30%          
Debt instrument balloon payment to be paid       $ 19,100,000          
Debt instrument original maturity date Dec. 11, 2015   Sep. 01, 2015   Sep. 01, 2015        
Principal repayments on mortgage notes payable $ 3,900,000   $ 11,300,000            
Excess of LIBOR rate         3.00%        
Carrying value of mortgage notes payable outstanding         $ 460,800,000        
Weighted average interest rate on debt outstanding         5.02%        
Mortgage Notes Payable [Member] | Synovus Bank [Member]                  
Debt Instrument [Line Items]                  
Long-term notes payable     $ 1,700,000 $ 19,800,000          
Debt instrument, frequency of periodic payment         Monthly        
Libor rate       2.25%          
Debt instrument maturity date description         Maturity date of July 1, 2018, with one, two-year extension option.        
Extension period subject to payment of fee         2 years        
Maturity Date         Jul. 01, 2018        
Mortgage Notes Payable [Member] | First Niagara Bank [Member]                  
Debt Instrument [Line Items]                  
Long-term notes payable $ 3,600,000                
Mortgage Notes Payable [Member] | LIBOR [Member] | Synovus Bank [Member] | Interest Rate Cap [Member]                  
Debt Instrument [Line Items]                  
LIBOR Cap         3.00%