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Derivative Instruments - Summary of Derivatives (Detail) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]    
(Loss) on derivative instruments - unrealized $ (2,889,000) $ (1,380,000)
Gain (loss) on derivative instruments - realized (156,000) 6,083,000
Total (3,045,000) 4,703,000
Foreign Currency Contract [Member] | Gain (Loss) on Derivative Instruments [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
(Loss) on derivative instruments - unrealized (2,883,000) (1,310,000)
Gain (loss) on derivative instruments - realized (156,000) 6,083,000
Interest Rate Cap [Member] | Gain (Loss) on Derivative Instruments [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
(Loss) on derivative instruments - unrealized (6,000) (70,000)
Aggregate notional amount $ 44,153,000 $ 48,722,000