Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income and Expenses [Abstract]
Interest income	$ (230)	$ (1,701)	$ (509)	$ (3,959)
Foreign currency (gain) loss, net	681	3,461	1,300	3,232
Loss on debt retirement	0	0	0	428
Other	(547)	(293)	(798)	(549)
Other (income) expense, net	$ (96)	$ 1,467	$ (7)	$ (848)