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Derivative Instruments - Weighted Average Maturities and Interest Rates (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability $ 0 $ (156)
Derivative Liability, Fair Value, Gross Asset 0 1
Estimated Fair Value (155)  
Interest Rate Swap [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability 0 (156)
Derivative Liability, Fair Value, Gross Asset 0 0
Interest Rate Cap [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability 0 0
Derivative Liability, Fair Value, Gross Asset 0 1
Derivative Financial Instruments, Liabilities [Member] | Interest Rate Swap [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Value 80,881  
Derivative Liability, Fair Value, Gross Liability (156)  
Derivative Financial Instruments, Liabilities [Member] | Interest Rate Cap [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Value 203,248  
Derivative Liability, Fair Value, Gross Asset $ 1