Goodwill and Identifiable Intangible Assets - Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 70,223	$ 78,930
Accumulated Amortization	(23,852)	(27,559)
Net Carrying Amount	46,371	51,371
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	60,718	67,897
Accumulated Amortization	(15,565)	(18,191)
Net Carrying Amount	45,153	49,706
Developed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,257	4,734
Accumulated Amortization	(3,744)	(4,124)
Net Carrying Amount	513	610
Trade name and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,248	6,299
Accumulated Amortization	(4,543)	(5,244)
Net Carrying Amount	$ 705	$ 1,055