Cash, Cash Equivalents and Investments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Abstract]
Cash balance included foreign bank balance	$ 142,009	$ 225,853
Interest Receivable	3,037	1,560
Gross realized losses	246	4,283	$ 1,581
Gross realized gains	$ 10	$ 164	$ 129