Derivative Financial Instruments - Derivatives Instruments Designated as Cash Flow Hedges - (Detail) - Cash Flow Hedging [Member] - Foreign Exchange Contract [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI	$ 0	$ 1,280	$ 121	$ 1,798
Cost of revenue [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0	107	611	71
Selling, General and Administrative Expenses [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0	52	351	34
Research and development [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	$ 0	$ 111	$ 668	$ 73