Accumulated Other Comprehensive Income (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Accumulated Other Comprehensive Income
Balance	$ 419,476
Balance	398,101
Amounts reclassified from AOCI	0
Unrealized Gain (Loss) on Marketable Securities, net of tax
Accumulated Other Comprehensive Income
Balance	(702)
Other comprehensive loss	(1,782)
Balance	(2,484)
Foreign Currency Items
Accumulated Other Comprehensive Income
Balance	2,596
Balance	2,596
Accumulated Other Comprehensive Income.
Accumulated Other Comprehensive Income
Balance	1,894
Other comprehensive loss	(1,782)
Balance	$ 112