NOTE 5 – 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		7,086		—			7,086
Other		471		—			471

June 30, 2018	$	233,027	$	(70,004	)	$	163,023

Other changes included in the above table represent minor adjustments for the allocation of certain acquisitions still under measurement and one immaterial acquisition completed during the six months ended June 30, 2018.

We test goodwill for impairment annually during the fourth quarter of our fiscal year or earlier if there is an impairment indicator. No impairment was recognized during either of the six month periods ended June 30, 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 June 30, 2018						As of December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	127,900	$	45,211	$	82,689	$	121,015	$	38,651	$	82,364
Covenants not-to-compete		12,715		6,120		6,595		11,807		4,773		7,034
Trademarks and trade names		61,068		16,119		44,949		58,136		14,076		44,060
Backlog		13,600		13,600		—		13,600		9,067		4,533

	$	215,283	$	81,050	$	134,233	$	204,558	$	66,567	$	137,991

The gross carrying amount of intangibles increased approximately $10.7 million during the six months ended June 30, 2018 primarily due to business combinations. See Note 14, Business Combinations, for more information. Remaining estimated aggregate annual amortization expense is as follows (amounts, in thousands, are for the fiscal year ended):


Remainder of 2018			10,084
2019			19,685
2020			18,893
2021			17,850
2022			16,932
Thereafter			50,789