Derivatives and Hedging - Location of Gains and Losses in Consolidated Condensed Statements of Operations that were Recognized and Derivative Contract Type (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency exchange contracts, amount of gain (loss) recognized in income on derivatives not designated as hedging instruments	$ 10,085,000	$ (7,688,000)	$ (2,917,000)
Foreign Currency Transaction Gain (Loss), net	(2,824,000)	808,000	226,000
Other income (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency exchange contracts, amount of gain (loss) recognized in income on derivatives not designated as hedging instruments	$ 9,705,000	$ (7,958,000)	$ (6,563,000)