Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Changes in accumulated other comprehensive income, net of tax
Balance at December 31, 2020			$ 3,435
Other comprehensive income and pension reclassification	$ 586	$ 893	(766)	$ (162)
Balance at June 30, 2021	2,669		2,669
Foreign currency
Changes in accumulated other comprehensive income, net of tax
Balance at December 31, 2020			3,945
Other comprehensive income and pension reclassification			(820)
Balance at June 30, 2021	3,125		3,125
Defined benefit pension plan
Changes in accumulated other comprehensive income, net of tax
Balance at December 31, 2020			(510)
Other comprehensive income and pension reclassification			54
Balance at June 30, 2021	$ (456)		$ (456)