Goodwill and Intangibles

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

NOTE 6

–

GOODWILL AND INTANGIBLES

Goodwill

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


	Goodwill (Gross)		Accumulated Impairment Losses			Goodwill (Net)
January 1, 2018	$	225,470	$	(70,004	)	$	155,466
Business combinations		17,023		—			17,023
Other		560		—			560

December 31, 2018		243,053		(70,004	)		173,049
Business combinations		22,405		—			22,405
Other		198		—			198

December 31, 2019	$	265,656	$	(70,004	)	$	195,652

Other changes included in the above table for the years ended December 31, 2019 and 2018 include minor adjustments for the allocation of certain acquisitions still under measurement as well as several immaterial

tuck-in

acquisitions. For additional information regarding changes to goodwill resulting from acquisitions, see Note 16, Business Combinations.

At October 1, 2019, our measurement date, we

tested goodwill for

impairment

by performing a “step one” test in conformity with generally accepted accounting principles

and determined that no impairment of goodwill

was required

. As such, no impairment of goodwill was recognized for the year ended December 31, 2019. In addition,

impairment of goodwill was recognized for the years ended December 31, 2018 or 2017.

Intangibles, net

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


	As of December 31,
	2019						2018
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	169,334	$	69,388	$	99,946	$	148,635	$	52,514	$	96,121
Covenants not-to-compete		16,959		10,617		6,342		14,682		7,572		7,110
Trademarks and tradenames		69,718		22,609		47,109		64,432		18,256		46,176
Backlog		14,080		13,915		165		14,060		13,677		383

	$	270,091	$	116,529	$	153,562	$	241,809	$	92,019	$	149,790

There was

intangible asset impairment loss for the years ended December 31, 2019, 2018 and 2017.

The gross carrying amount of intangibles increased approximately $28.3 million and $

37.3

million during the years ended December 31, 2019 and 2018, respectively. Intangibles associated with business combinations accounted for approximately $

28.0

million and $

36.1

million of the increases during the years ended

December 31, 2019 and 2018, respectively. For more information, see Note 16, Business Combinations. Amortization expense on intangible

assets totaled approximately $

24.5

million, $

25.4

million and $

26.9

million during the years ended December 31, 2019, 2018 and 2017, respectively. Remaining estimated aggregate annual amortization expense is as follows (in thousands):


2020	$	25,741
2021		24,399
2022		23,479
2023		20,568
2024		17,053
Thereafter		42,322