Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Accumulated other comprehensive income (loss):
Beginning balance	$ 1,193,651	$ 1,124,789	$ 1,047,849	$ 1,097,699	$ 1,010,904	$ 976,255
Other comprehensive income (loss)	(2,601)	(2,327)	(1,561)	(793)	(369)	1
Ending balance	1,231,313	1,193,651	1,124,789	1,113,903	1,097,699	1,010,904
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss):
Beginning balance	(5,205)	(2,878)	(1,317)	(227)	142	141
Other comprehensive income (loss)	(2,601)	(2,327)	(1,561)	(793)	(369)	1
Ending balance	(7,806)	(5,205)	(2,878)	(1,020)	(227)	142
Unrealized Gains (Losses) on Available-for-Sale Investments
Accumulated other comprehensive income (loss):
Beginning balance	(857)	(696)	(207)
Other comprehensive income (loss)	(326)	(161)	(489)
Ending balance	(1,183)	(857)	(696)
Foreign Currency Translation
Accumulated other comprehensive income (loss):
Beginning balance	(4,348)	(2,182)	(1,110)	(227)	142	141
Other comprehensive income (loss)	(2,275)	(2,166)	(1,072)	(793)	(369)	1
Ending balance	$ (6,623)	$ (4,348)	$ (2,182)	$ (1,020)	$ (227)	$ 142