Goodwill and Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 341,659	$ 316,454
Accumulated Amortization	153,457	145,061
Net Book Value	188,202	171,393
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	215,841	197,641
Accumulated Amortization	94,790	89,137
Net Book Value	121,051	108,504
Covenants not-to-compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	22,914	20,309
Accumulated Amortization	14,127	13,436
Net Book Value	8,787	6,873
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	84,057	79,657
Accumulated Amortization	28,488	27,245
Net Book Value	55,569	52,412
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,847	18,847
Accumulated Amortization	16,052	15,243
Net Book Value	$ 2,795	$ 3,604