Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
Accumulated other comprehensive income (loss):
Beginning balance	$ 1,124,789	$ 1,047,849	$ 1,010,904	$ 976,255
Other comprehensive income (loss)	(2,327)	(1,561)
Ending balance	1,193,651	1,124,789	1,097,699	1,010,904
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss):
Beginning balance	(2,878)	(1,317)	142	141
Other comprehensive income (loss)	(2,327)	(1,561)	(369)	1
Ending balance	(5,205)	(2,878)	(227)	142
Unrealized Gains (Losses) on Available-for-Sale Investments
Accumulated other comprehensive income (loss):
Beginning balance	(696)	(207)
Other comprehensive income (loss)	(161)	(489)
Ending balance	(857)	(696)
Foreign Currency Translation
Accumulated other comprehensive income (loss):
Beginning balance	(2,182)	(1,110)	142	141
Other comprehensive income (loss)	(2,166)	(1,072)	(369)	1
Ending balance	$ (4,348)	$ (2,182)	$ (227)	$ 142