Employee Benefit Plans - Summary of Change in Projected Benefit Obligation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in projected benefit obligation:
Projected benefit obligation at the beginning of the year	$ 11,044	$ 10,305
Business acquisition	0	326
Service cost	1,953	1,735	$ 1,933
Interest cost	875	714	645
Benefits paid	(960)	(1,066)
Actuarial loss/(gain)	2,577	(134)
Effect of exchange rate changes	(178)	(836)
Projected benefit obligation at the end of the year	15,311	11,044	$ 10,305
Unfunded amount–non-current	6,517	3,616
Unfunded amount–current	10	8
Total accrued liability	6,527	3,624
Accumulated benefit obligation	$ 10,743	$ 7,239