Exit and Realignment Costs - Accrual for Exit and Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Reserve [Roll Forward]
Accrued exit and realignment costs, beginning of period	$ 3,146	$ 8,162
Cash payments	(2,915)	(5,799)
Accrued exit and realignment costs, end of period	2,388	4,192
Severance
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:		1,391
Information system restructuring costs
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:	1,029	183
Lease obligations
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:	347	202
Other
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:	$ 781	$ 53