Intangible Assets

9 Months Ended

Sep. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

6. Intangible Assets

The following table sets forth the carrying amount of the Company’s intangible assets as of September 30, 2015 and December 31, 2014 (in thousands):

	September 30, 2015							December 31, 2014
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Customer relationships	$	404,042	$	(153,228	)	$	250,814	$	405,021	$	(128,510	)	$	276,511
Technology		27,561		(26,515	)		1,046		27,832		(23,442	)		4,390
Tradenames subject to amortization		24,206		(20,128	)		4,078		24,505		(18,513	)		5,992
Backlog		95,015		(87,434	)		7,581		95,015		(80,447	)		14,568
Other		1,020		(555	)		465		1,020		(465	)		555
Total finite-lived intangible assets		551,844		(287,860	)		263,984		553,393		(251,377	)		302,016
Tradenames not subject to amortization		115,802		—			115,802		115,808		—			115,808
Total intangible assets	$	667,646	$	(287,860	)	$	379,786	$	669,201	$	(251,377	)	$	417,824