Goodwill and Identifiable Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Identifiable Intangible Assets, Net

Schedule of changes in the carrying amount of goodwill

The changes in the carrying amount of goodwill are as follows (in thousands):

	December 31,
	2017		2016
Balance at beginning of year	$	149,208	$	143,874
Additions (See Note 4)		52,481		5,334
Impairment adjustment		(1,105)		—
Balance at end of year	$	200,584	$	149,208

Schedule of components of identifiable intangible assets

Identifiable intangible assets consist of the following (dollars in thousands):

	Estimated	2017				2016
	Useful Lives	Gross Book		Accumulated		Gross Book		Accumulated
	in Years	Value		Amortization		Value		Amortization
Customer relationships	1 - 15	$	98,244	$	(47,057)	$	57,230	$	(36,758)
Backlog	1 - 2		6,300		(5,478)		3,600		(3,433)
Noncompete agreements	2 - 7		—		—		2,890		(2,890)
Tradenames	2 - 25		35,340		(11,305)		31,640		(9,844)
Total		$	139,884	$	(63,840)	$	95,360	$	(52,925)

Schedule of future amortization expense of identifiable intangible assets

At December 31, 2017, future amortization expense of identifiable intangible assets is as follows (in thousands):

Year ended December 31—
2018	$	13,786
2019		11,320
2020		9,252
2021		7,651
2022		6,041
Thereafter		27,994
Total	$	76,044