Restructuring Charges (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Restructuring Costs
Expenses, net	$ 7,733	$ 8,739
Cash payments	$ (8,825)	(11,365)
Minimum
Restructuring Costs
Restructuring reserve, expected payment period	12 months
Maximum
Restructuring Costs
Restructuring reserve, expected payment period	24 months
Severance and other exit costs
Restructuring Costs
Balance Beginning	$ 10,063	12,006
Expenses, net	7,733	8,739
Cash payments	(8,825)	(11,365)
Noncash activity	(541)	(1,836)
Balance Ending	$ 8,430	$ 7,544