Goodwill and Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 357,547	$ 316,454
Accumulated Amortization	162,635	145,061
Net Book Value	194,912	171,393
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	225,509	197,641
Accumulated Amortization	100,942	89,137
Net Book Value	124,567	108,504
Covenants not-to-compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,066	20,309
Accumulated Amortization	14,857	13,436
Net Book Value	9,209	6,873
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	87,547	79,657
Accumulated Amortization	29,809	27,245
Net Book Value	57,738	52,412
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,425	18,847
Accumulated Amortization	17,027	15,243
Net Book Value	$ 3,398	$ 3,604