Employee Benefit Plans - Net Period Benefit Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Retirement Benefits [Abstract]
Service cost	$ 956	$ 990
Interest cost	395	323
Expected return on plan assets	(263)	(228)
Amortization of actuarial (gain)/loss, gross of tax	(25)	155
Net gratuity cost	1,063	1,240
Income tax effects on above	(19)	(47)
Amortization of actuarial (gain)/loss, net of tax	$ (44)	$ 108