Quarterly report pursuant to Section 13 or 15(d)

Mortgage Notes Payable and Line of Credit - Company's Mortgage Notes Payable and Line of Credit (Detail)

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Mortgage Notes Payable and Line of Credit - Company's Mortgage Notes Payable and Line of Credit (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Property
Dec. 31, 2013
Debt Instrument [Line Items]    
Encumbered properties 91  
Carrying value $ 481,887 $ 447,002
Stated Interest Rates One month LIBOR was approximately 0.1552%.  
Libor rate 0.1552%  
Variable Rate Line of Credit [Member]
   
Debt Instrument [Line Items]    
Encumbered properties 16  
Carrying value 25,650 24,400
Stated Interest Rates LIBOR+3.00%  
Libor rate 3.00%  
Scheduled Maturity Dates Aug. 01, 2017  
Premiums and Discounts (Net) [Member]
   
Debt Instrument [Line Items]    
Carrying value 859 724
Fixed Rate Mortgage Loans [Member]
   
Debt Instrument [Line Items]    
Encumbered properties 71  
Carrying value 447,178 413,678
Variable Rate Mortgage Loans [Member]
   
Debt Instrument [Line Items]    
Encumbered properties 4  
Carrying value 8,200 8,200
Stated Interest Rates LIBOR+2.15%  
Libor rate 2.15%  
Scheduled Maturity Dates Dec. 01, 2016  
Mortgages Notes Payable [Member]
   
Debt Instrument [Line Items]    
Encumbered properties 75  
Carrying value $ 456,237 $ 422,602