Goodwill and Intangibles (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017	$	177,090	$	(70,004	)	$	107,086
Business Combinations		36,948		—			36,948
Other		210		—			210
March 31, 2017	$	214,248	$	(70,004	)	$	144,244

Schedule of Gross Carrying Amount and Accumulated Amortization

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

	As of March 31, 2017						As of December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	108,983	$	29,659	$	79,324	$	80,909	$	27,533	$	53,376
Covenants not-to-compete		10,238		3,003		7,235		8,602		2,466		6,136
Trademarks and tradenames		52,698		11,227		41,471		37,303		10,498		26,805
Backlog		13,400		2,233		11,167		—		—		—
	$	185,319	$	46,122	$	139,197	$	126,814	$	40,497	$	86,317

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 2017	$	19,437
2018		21,140
2019		16,168
2020		15,568
2021		14,550
Thereafter		52,334