Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amounts	$ 125,428	$ 95,841
Accumulated Amortization	(49,630)	(57,888)
Net Carrying Amounts	75,798	37,953
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amounts	100,682	82,431
Accumulated Amortization	(39,978)	(49,716)
Net Carrying Amounts	60,704	32,715
Non-compete agreements
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amounts	1,523	1,264
Accumulated Amortization	(738)	(601)
Net Carrying Amounts	785	663
Customer backlog
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amounts	9,083	1,102
Accumulated Amortization	(720)	(987)
Net Carrying Amounts	8,363	115
Trade name
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amounts	419	60
Accumulated Amortization	(55)	(37)
Net Carrying Amounts	364	23
Developed software
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amounts	13,721	10,984
Accumulated Amortization	(8,139)	(6,547)
Net Carrying Amounts	$ 5,582	$ 4,437