Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets

Schedule of changes in goodwill

Balance as of January 1, 2013	$	384,341
OTSS acquisition		1,388
Morehead adjustments		21
Balance as of December 31, 2013	$	385,750
OTSS adjustments		375
DCS acquisition		2,162
NDNQI acquisition		14,647
Balance as of December 31, 2014	$	402,934
HPI acquisition		8,269
Balance as of December 31, 2015	$	411,203

Schedule of intangible assets

		December 31, 2015						December 31, 2014
	Weighted
	Average	Gross				Net		Gross				Net
	Remaining	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Useful Life	Amount		Amortization		Amount		Amount		Amortization		Amount
Trade name (indefinite life)	—	$	200,000	$	—	$	200,000	$	200,000	$	—	$	200,000
Trade names (finite life)	4.2		2,410		(1,509)		901		2,130		(1,167)		963
Customer relationships	12.3		237,620		(94,851)		142,769		235,300		(82,010)		153,290
Proprietary technology	9.0		32,240		(14,849)		17,391		32,240		(11,645)		20,595
Other	7.9		3,180		(1,776)		1,404		2,090		(1,547)		543
		$	475,450	$	(112,985)	$	362,465	$	471,760	$	(96,369)	$	375,391

Schedule of estimated remaining amortization expense related to finite-lived intangible assets

2016	$	16,470
2017		15,527
2018		13,939
2019		13,393
2020		12,965
Thereafter		90,171
	$	162,465