Goodwill and Intangibles (Tables)

3 Months Ended

Mar. 31, 2020

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, 2020	$	265,656		$	(70,004	)	$	195,652
Business Combinations		3,192			—			3,192
Other		(180	)		—			(180	)
March 31, 2020	$	268,668		$	(70,004	)	$	198,664

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 March 31,						As of December 31,
	2020						2019
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	171,945	$	74,061	$	97,884	$	169,334	$	69,388	$	99,946
Covenants not-to-compete		17,189		11,391		5,798		16,959		10,617		6,342
Trademarks and tradenames		70,891		23,752		47,139		69,718		22,609		47,109
Backlog		14,610		14,005		605		14,080		13,915		165
	$	274,635	$	123,209	$	151,426	$	270,091	$	116,529	$	153,562

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 2020	$	19,737
2021		25,086
2022		23,930
2023		21,019
2024		17,504
Thereafter		44,150