Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

At December 31, 2015, the Company had the following intangible assets subject to amortization:


(in thousands)
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Patents	$	268	$	(177	)	$	91
Trade names		14,981		(2,884	)		12,097
Customer relationships		28,901		(4,488	)		24,413
Customer contracts and backlog		4,822		(4,481	)		341
Technology		1,953		(248	)		1,705
Favorable lease		334		(140	)		194
Non-compete agreements		1,113		(369	)		744
Product certification and licensing costs		72		(62	)		10

	$	52,444	$	(12,849	)	$	39,595

At December 31, 2014, the Company had the following intangible assets subject to amortization:


(in thousands)
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Patents	$	268	$	(153	)	$	115
Trade names		11,358		(1,280	)		10,078
Customer relationships		24,455		(2,942	)		21,513
Customer contracts and backlog		4,496		(4,038	)		458
Technology		1,953		(196	)		1,757
Favorable lease		334		(64	)		270
Non-compete agreements		740		(151	)		589
Product certification and licensing costs		61		(57	)		4

	$	43,665	$	(8,881	)	$	34,784

Amortization expense during the years ended December 31, 2015, 2014 and 2013 is as follows:


(in thousands)	Estimated useful life	2015		2014		2013
Patents and trade names	12 to 17 years	$	939	$	688	$	388
Customer relationships	10 to 15 years		2,094		1,694		761
Customer contracts and backlog	1 to 3 years		443		2,425		1,613
Technology	10 years		195		129		67
Favorable Leases	10 years		77		61		3
Non-compete agreement	6 years		215		141		10
Product certification and licensing costs	3 years		5		11		17


Total		$	3,968	$	5,149	$	2,859

Amortization expense for intangible assets for the next 5 years is estimated as follows:


(in thousands)	2016		2017		2018		2019		2020
Patents	$	23	$	23	$	23	$	22	$	—
Trade names		1,135		1,135		1,135		1,135		1,080
Customer relationships		2,267		2,267		2,200		2,166		2,166
Customer contracts and backlog		246		56		39		—		—
Technology		195		195		195		195		195
Favorable Leases		43		22		22		22		22
Non-compete agreement		283		222		171		68		—
Product certification and licensing costs		4		3		3		—		—

Total	$	4,196	$	3,923	$	3,788	$	3,608	$	3,463