Goodwill and Intangibles (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Change in Carrying Amount of Goodwill

The change in carrying amount of goodwill was as follows (in thousands):

	Goodwill (Gross)		Accumulated Impairment Losses		Goodwill (Net)
January 1, 2021	$	286,874	$	(70,004)	$	216,870
Business Combinations	33,087		—		33,087
Other	25		—		25
June 30, 2021	$	319,986	$	(70,004)	$	249,982

Schedule of Gross Carrying Amount, Accumulated Amortization and Net Book Value

The following table provides the gross carrying amount, accumulated amortization and net book value for each major class of intangibles (in thousands):

	As of June 30,						As of December 31,
	2021						2020
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	225,509	$	100,942	$	124,567	$	197,641	$	89,137	$	108,504
Covenants not-to-compete	24,066		14,857		9,209		20,309		13,436		6,873
Trademarks and tradenames	87,547		29,809		57,738		79,657		27,245		52,412
Backlog	20,425		17,027		3,398		18,847		15,243		3,604
	$	357,547	$	162,635	$	194,912	$	316,454	$	145,061	$	171,393

Schedule of Estimated Aggregate Annual Amortization

Remaining estimated aggregate annual amortization expense is as follows (amounts, in thousands, are for the fiscal year ended):

Remainder of 2021	$	18,738
2022	34,136
2023	29,814
2024	26,301
2025	20,896
Thereafter	65,027