CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 72,331	$ 58,711	$ 82,770
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(7,196)	8,368	3,418
Unrealized holding gains (losses) on short-term investments arising during period	(19)	(3)	14
Other comprehensive income (loss), net of tax	(7,215)	8,365	3,432
Total comprehensive income, net of tax	$ 65,116	$ 67,076	$ 86,202