Fair Value Measurements - Financial Assets and Liabilities Measured and Reported at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Assets:
Derivative asset			$ 28,280
Liabilities:
Derivative liability	$ 8,045
Level 1
Assets:
Derivative asset			0
Liabilities:
Derivative liability	0
Level 2
Assets:
Derivative asset			28,280
Liabilities:
Derivative liability	8,045
Level 3
Assets:
Derivative asset			0
Liabilities:
Derivative liability	0
Foreign Exchange Forward
Assets:
Derivative asset	9,075	$ 18,106	22,992
Liabilities:
Derivative liability	6,513	3,720	8,261
Foreign Exchange Forward | Level 1
Assets:
Derivative asset	0	0	0
Liabilities:
Derivative liability	0	0	0
Foreign Exchange Forward | Level 2
Assets:
Derivative asset	9,075	18,106	22,992
Liabilities:
Derivative liability	6,513	3,720	8,261
Foreign Exchange Forward | Level 3
Assets:
Derivative asset	0	0	0
Liabilities:
Derivative liability	0	$ 0	0
Currency Swap
Assets:
Derivative asset			5,288
Liabilities:
Derivative liability	1,532
Currency Swap | Level 1
Assets:
Derivative asset			0
Liabilities:
Derivative liability	0
Currency Swap | Level 2
Assets:
Derivative asset			5,288
Liabilities:
Derivative liability	1,532
Currency Swap | Level 3
Assets:
Derivative asset			$ 0
Liabilities:
Derivative liability	$ 0