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Derivative Instruments - Summary of Derivatives (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]        
Unrealized gains (loss) on derivative instruments $ (10,297) $ 2,096 $ 1,731 $ (4,144)
Total 4,815 2,096 22,831 (4,144)
Foreign Currency Contract [Member] | Gain (Loss) on Derivative Instruments [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Unrealized gains (loss) on derivative instruments (10,304) 2,240 1,812 (3,938)
Realized gain (loss) on derivative instruments 15,112 0 21,100 0
Interest Rate Cap [Member] | Gain (Loss) on Derivative Instruments [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Unrealized gains (loss) on derivative instruments $ 7 $ (144) $ (81) $ (206)