Fair Value Measurements - Financial Assets and Liabilities Measured and Reported at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets:
Foreign currency forward exchange contracts	$ 15,002	$ 16,092
Available-for-sale	3,530	5,243
Total assets	18,532	21,335
Liabilities:
Foreign currency forward exchange contracts	2,976	2,910
Level 1
Assets:
Foreign currency forward exchange contracts	0	0
Available-for-sale	3,530	5,243
Total assets	3,530	5,243
Liabilities:
Foreign currency forward exchange contracts	0	0
Level 2
Assets:
Foreign currency forward exchange contracts	15,002	16,092
Available-for-sale	0	0
Total assets	15,002	16,092
Liabilities:
Foreign currency forward exchange contracts	2,976	2,910
Level 3
Assets:
Foreign currency forward exchange contracts	0	0
Available-for-sale	0	0
Total assets	0	0
Liabilities:
Foreign currency forward exchange contracts	$ 0	$ 0