Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 604	$ 700	$ (4,184)	$ 1,669
Product revenues | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives		435		675
Other comprehensive income (loss) | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	1,458	297	(3,337)	1,063
Cost of sales | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(796)		(718)
Foreign currency loss | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ (58)	$ (32)	$ (129)	$ (69)