Intangible Assets

3 Months Ended

Mar. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

5. Intangible Assets

The following table sets forth the carrying amount of the Company’s intangible assets as of March 31, 2016 and December 31, 2015 (in thousands):

	March 31, 2016							December 31, 2015
			Accumulated							Accumulated
	Gross		Amortization			Net		Gross		Amortization			Net
Customer relationships	$	366,169	$	(156,458	)	$	209,711	$	365,777	$	(148,679	)	$	217,098
Technology		27,090		(26,364	)		726		27,003		(26,206	)		797
Tradenames subject to amortization		18,314		(16,787	)		1,527		18,293		(16,657	)		1,636
Backlog		95,029		(90,783	)		4,246		95,014		(89,427	)		5,587
Other		1,020		(615	)		405		1,020		(585	)		435
Total finite-lived intangible assets		507,622		(291,007	)		216,615		507,107		(281,554	)		225,553
Tradenames not subject to amortization		109,304		—			109,304		109,093		—			109,093
Total intangible assets	$	616,926	$	(291,007	)	$	325,919	$	616,200	$	(281,554	)	$	334,646