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Derivative Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]    
Unrealized gains (losses) on derivative instruments $ 0 $ 72
Total 0 0
Interest Rate Swap [Member] | Gain (Loss) on Derivative Instruments [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Loss on derivative instruments-realized 0 (72)
Unrealized gains (losses) on derivative instruments 0 72
Interest Rate Cap [Member] | Gain (Loss) on Derivative Instruments [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Unrealized gains (losses) on derivative instruments $ 0 $ 0