Derivatives and Hedging - Location of Gains and Losses in Consolidated Condensed Statements of Operations that were Recognized and Derivative Contract Type (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency exchange contracts, amount of gain (loss) recognized in income on derivatives not designated as hedging instruments		$ 2,910,000	$ 6,947,000	$ 10,085,000
Foreign Currency Transaction Gain (Loss), net		9,024,000	(5,838,000)	(2,824,000)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax		2,956,000	2,811,000	389,000
Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Settlement of cross-currency swap contract		18,510,000	11,212,000
Settlement of cross-currency swap contract		18,510,000	11,212,000
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		2,156,000	4,176,000	9,705,000
Other income (expense) | Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Settlement of cross-currency swap contract	$ 11,046,000	11,046,000	0	0
Settlement of cross-currency swap contract	$ 11,046,000	$ 11,046,000	$ 0	$ 0