Goodwill and Identifiable Intangible Assets - Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 72,614	$ 78,488
Accumulated Amortization	(29,623)	(33,476)
Net Carrying Amount	42,991	45,012
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	68,385	66,796
Accumulated Amortization	(26,174)	(22,714)
Net Carrying Amount	42,211	44,082
Developed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,643	5,048
Accumulated Amortization	(2,449)	(4,760)
Net Carrying Amount	194	288
Trade name and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,586	6,644
Accumulated Amortization	(1,000)	(6,002)
Net Carrying Amount	$ 586	$ 642