Segment Information - Reconciliation of Segment Measure to (Loss) Income Before (Expense) Benefit from Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting [Abstract]
Total	$ 20,963	$ 13,895	$ 37,762	$ 19,448
Interest expense, net	(6,798)	(5,260)	(9,486)	(7,853)
Income tax (expense) benefit	256	1,759	254	4,911
Depreciation and amortization	(10,905)	(9,784)	(21,674)	(17,344)
Stock-based compensation	(2,417)	(1,140)	(4,222)	(2,290)
Start-up losses and investment in new services	(1,123)	(296)	(2,090)	(675)
Acquisition costs	(506)	(2,454)	(743)	(3,761)
Fair value changes in financial instruments	(518)	21,842	(1,120)	(7,783)
Fair value changes in business acquisitions contingent consideration	(12,971)	(3,983)	(24,035)	(3,983)
Short term purchase accounting fair value adjustment to deferred revenue				(243)
Initial public offering expense				(531)
Discontinued services		(1,078)		(7,496)
Expenses related to financing transactions		(277)	(50)	(277)
Other losses or expenses	(464)		(675)	(147)
Net (loss) income	$ (14,483)	$ 13,224	$ (26,079)	$ (28,024)