Exit and Realignment Costs - Accrual for Exit and Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Restructuring Reserve [Roll Forward]
Accrued exit and realignment costs, beginning of period	$ 2,560	$ 2,388	$ 3,146	$ 4,320	$ 4,192	$ 8,162
Cash payments	(4,199)	(2,302)	(2,915)	(7,083)	(2,072)	(5,799)
Accrued exit and realignment costs, end of period	3,116	2,560	2,388	2,828	4,320	4,192
Severance
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:				1,950	809	1,391
Information system restructuring costs
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:	1,506	1,611	1,029	77	671	183
Lease obligations
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:	107	(126)	347	848	219	202
Other
Restructuring Reserve [Roll Forward]
Provision for exit and realignment activities:	$ 3,142	$ 989	$ 781	$ 2,716	$ 501	$ 53