Goodwill and Intangible Assets - Schedule of Amounts Related to Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross Balance	$ 248,597	$ 168,716
Accumulated Amortization	79,323	66,167
Total Intangible Assets—Net	169,274	102,549
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Balance	164,782	108,782
Accumulated Amortization	44,665	36,700
Total Intangible Assets—Net	$ 120,117	$ 72,082
Customer Relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	7 years	7 years
Customer Relationships | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	15 years	10 years
Covenants Not to Compete
Finite Lived Intangible Assets [Line Items]
Gross Balance	$ 29,832	$ 25,832
Accumulated Amortization	19,424	17,572
Total Intangible Assets—Net	$ 10,408	$ 8,260
Covenants Not to Compete | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	4 years	4 years
Covenants Not to Compete | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years	5 years
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross Balance	$ 16,943	$ 12,738
Accumulated Amortization	11,518	10,230
Total Intangible Assets—Net	$ 5,425	$ 2,508
Trade Names | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	1 year	1 year
Trade Names | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years	5 years
Proprietary Software
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life		3 years
Gross Balance	$ 19,561	$ 3,885
Accumulated Amortization	2,865	1,359
Total Intangible Assets—Net	$ 16,696	$ 2,526
Proprietary Software | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Proprietary Software | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Patent
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	16 years	16 years
Gross Balance	$ 17,479	$ 17,479
Accumulated Amortization	851	306
Total Intangible Assets—Net	$ 16,628	$ 17,173