Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Estimated Useful Lives

The Company's intangible assets and estimated useful lives are classified as follows:

	December 31, 2015					December 31, 2014
(in thousands)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Finite-lived intangible assets:
Developed software and core technologies (3 – 11 years)	$	336,262	$	(251,201	)	$	321,076	$	(227,298	)
Customer lists and contract backlog (5 – 15 years)	159,885		(76,160		)	221,159		(121,380		)
Trade names (2 – 10 years)	127,903		(76,493		)	114,432		(63,082		)
Non-compete agreement	—		—			300		(52		)
Total	$	624,050	$	(403,854	)	$	656,967	$	(411,812	)
Indefinite-lived intangible assets:
Trade names	$	357				$	14,157

Estimated Future Amortization Expense for Intangible Assets

As of December 31, 2015, estimated future amortization expense for the intangible assets reflected above is as follows:

(in thousands)
2016	$	50,574
2017	47,714
2018	34,368
2019	20,887
2020	19,787
Thereafter	46,866
Total intangible assets subject to amortization	220,196
Indefinite-lived trade name	357
Other intangible assets, net	$	220,553

Changes in Goodwill

The changes in goodwill during the years ended December 31, 2015 and 2014 are as follows:

(in thousands)	2015			2014
Beginning balance - January 1	$	1,312,182		$	1,255,704
Acquisitions	28,561			60,484
Adjustments(1)	(4,573		)	619
Currency translation	(3,822		)	(4,625		)
Ending balance - December 31	$	1,332,348		$	1,312,182