Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

5. Goodwill and Intangible Assets

Goodwill

The change in the carrying amounts of goodwill was as follows by segment (in thousands):

	Commercial		Public Sector		Canada		Total
Balance at December 31, 2015	$	69,335	$	8,322	$	2,895	$	80,552
Goodwill related to Acrodex acquisition		—		—		329		329
Goodwill related to Systemax asset acquisition		400		—		—		400
Foreign currency translation		—		—		153		153
Balance at September 30, 2016	$	69,735	$	8,322	$	3,377	$	81,434

Intangible Assets

The following table sets forth the amounts recorded for intangible assets (in thousands):

	Weighted Average Estimated		At September 30, 2016							At December 31, 2015
	Useful Lives (years)		Gross Amount			Accumulated Amortization		Net Amount		Gross Amount			Accumulated Amortization		Net Amount
Patent, trademarks, trade names & URLs		4	$	7,705	(1)	$	1,590	$	6,115	$	7,675	(1)	$	585	$	7,090
Customer relationships		15		13,425			4,519		8,906		13,299			1,587		11,712
Non-compete agreements		4		2,366			816		1,550		2,354			349		2,005
Total intangible assets			$	23,496		$	6,925	$	16,571	$	23,328		$	2,521	$	20,807

(1) Includes $2.9 million of trademarks with indefinite useful lives that are not amortized.

Amortization expense for intangible assets was approximately $1.4 million and $0.4 million for the three months ended September 30, 2016 and 2015 and $4.4 million and $0.9 million for the nine months ended September 30, 2016 and 2015. Estimated amortization expense for intangible assets in each of the next five years and thereafter is as follows as of September 30, 2016: $1.4 million in the remainder of 2016, $4.1 million in 2017, $3.0 million in 2018, $1.8 million in 2019 and $3.3 million thereafter.