Intangible Assets - Schedule of Goodwill, Customer Relationships and Trademarks (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 120,343	$ 120,343
Total	19,047
Customer relationships—Acquired
Finite-Lived Intangible Assets [Line Items]
Cost	58,688	58,688
Accumulated amortization	(46,445)	(44,175)
Total	12,243	14,513
Customer relationships—Other
Finite-Lived Intangible Assets [Line Items]
Cost	8,898	8,988
Accumulated amortization	(6,415)	(5,733)
Total	2,483	3,255
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	7,570	7,570
Accumulated amortization	(3,249)	(2,972)
Total	$ 4,321	$ 4,598