Intangible Assets

6 Months Ended

Jun. 30, 2017

Finite-Lived Intangible Assets, Net [Abstract]

Intangible Assets

Intangible Assets

Intangible assets at the balance sheet dates are comprised of the following:

	June 30, 2017
(Dollars in thousands, lives in years)	Useful Life	Historical Cost		Accumulated Amortization			Net Balance
Customer relationships	9.3	$	62,401	$	(30,713	)	$	31,688
Trade names and trademarks	7.4	6,786		(2,486		)	4,300
Non-compete agreements	5.0	574		(543		)	31
Other intangibles	6.0	572		(78		)	494
		$	70,333	$	(33,820	)	$	36,513
	December 31, 2016
(Dollars in thousands, lives in years)	Useful Life	Historical Cost		Accumulated Amortization			Net Balance
Customer relationships	9.3	$	62,401	$	(27,364	)	$	35,037
Trade names and trademarks	7.4	6,786		(1,972		)	4,814
Non-compete agreements	5.0	574		(512		)	62
Other intangibles	6.0	572		—			572
		$	70,333	$	(29,848	)	$	40,485

For the three months ended June 30, 2017 and 2016, intangible assets amortization expense was $2.1 million and $1.2 million, respectively. For the six months ended June 30, 2017 and 2016, intangible assets amortization expense was $4.0 million and $2.5 million, respectively. The increase in the 2017 periods was due to the additional amortization expense attributable to intangible assets associated with the acquisition of Manchester Industries in December 2016.