Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated other comprehensive income loss
Beginning balance	$ 976,255	$ 543,495	$ 467,324
Other comprehensive income (loss)	(1,458)	1,237	417
Ending balance	1,047,849	976,255	543,495
Accumulated Other Comprehensive Income (loss).
Accumulated other comprehensive income loss
Beginning balance	141	(1,096)	(1,513)
Other comprehensive income (loss)	(1,458)	1,237	417
Ending balance	(1,317)	141	(1,096)
Unrealized Gains (Losses) on Available-for-Sale Investments
Accumulated other comprehensive income loss
Other comprehensive income (loss)	(207)
Ending balance	(207)
Foreign Currency Translation
Accumulated other comprehensive income loss
Beginning balance	141	(1,096)
Other comprehensive income (loss)	(1,251)	1,237
Ending balance	$ (1,110)	$ 141	$ (1,096)