Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Interest income	$ (256)	$ (1,016)	$ (765)	$ (4,975)
Foreign currency (gain) loss, net	(53)	3,069	1,247	6,301
Loss on debt retirement	0	491	0	919
Other	(192)	(129)	(990)	(678)
Other (income) expense, net	$ (501)	$ 2,415	$ (508)	$ 1,567