Income Taxes - Components of Comprehensive Provision for Income Taxes Allocation (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Comprehensive provision (benefit) for income taxes allocable to:
Net income (loss)	$ 2,505	$ (3,263)
Additional paid-in capital		(100)
Other comprehensive income (loss):
Currency translation	100	(2,700)
Total	2,900	(5,800)
Defined Benefit Pension Plans
Other comprehensive income (loss):
Defined benefit plans	$ 300	$ 300