Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Abstract]
Interest income	$ (1,016)	$ (1,269)	$ (4,975)	$ (4,931)
Foreign currency (gain) loss, net	3,069	(174)	6,301	(1,581)
Loss on debt retirement	491	179	919	8,535
Other	(129)	(496)	(678)	(1,382)
Other (income) expense, net	$ 2,415	$ (1,760)	$ 1,567	$ 641