Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Changes To Goodwill

Changes to goodwill are as follows:

(in thousands)	Nine Months Ended September 30, 2014			Year Ended December 31, 2013
Balance at beginning of period	$	1,249,316		$	813,792
Additions	—			442,170
Disposals	(813		)	(2,834		)
Adjustments to purchase price allocations	(2,589		)	—
Currency translation and other	(22,261		)	(3,812		)
Balance at end of period	$	1,223,653		$	1,249,316

Changes To Intangible Assets

Changes to intangible assets are as follows:

(in thousands)	Nine Months Ended September 30, 2014			Year Ended December 31, 2013
Balance at beginning of period, net of accumulated amortization	$	408,923		$	125,913
Additions	—			301,800
Disposals	—			(311		)
Amortization expense	(29,685		)	(18,795		)
Currency translation and other	(7,671		)	316
Balance at end of period, net of accumulated amortization	$	371,567		$	408,923

Summary Of Intangible Assets

A summary of intangible assets follows:

	Weighted Average Amortization Period of Finite Lived Assets (in years)
		September 30, 2014						December 31, 2013
(in thousands)		Gross Asset		Accumulated Amortization		Net		Gross Asset		Accumulated Amortization		Net
Intellectual property rights	16.5	$	93,067	$	50,328	$	42,739	$	95,052	$	48,960	$	46,092
Customer relationships and backlog	13.8	412,752		108,292		304,460		420,951		86,556		334,395
Drawings	37.9	11,149		10,027		1,122		11,149		9,951		1,198
Other	12.8	64,125		40,879		23,246		64,800		37,562		27,238
Total	14.4	$	581,093	$	209,526	$	371,567	$	591,952	$	183,029	$	408,923