Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2012

Changes To Goodwill

Changes to goodwill are as follows:

(in thousands)	Six Months Ended June  30, 2012			Year Ended December 31, 2011
Balance at beginning of period	$	820,824		$	810,285
Additions		—			10,900
Disposals		(13,966	)		—
Adjustments to purchase price allocations		—			3,932
Currency translation		(688	)		(4,293	)
Balance at end of period	$	806,170		$	820,824

Changes To Intangible Assets

Changes to intangible assets are as follows:

(in thousands)	Six Months Ended June  30, 2012			Year Ended December 31, 2011
Balance at beginning of period, net of accumulated amortization	$	146,227		$	162,636
Additions		—			5,980
Disposals		(3,789	)		—
Amortization expense		(9,767	)		(21,646	)
Currency translation and other		(1,205	)		(743	)
Balance at end of period, net of accumulated amortization	$	131,466		$	146,227

Summary Of Intangible Assets

A summary of intangible assets follows:

	Weighted Average
	Amortization
(in thousands)	Period of Finite	June 30, 2012						December 31, 2011
	Lived Assets (in years)	Gross Asset		Accumulated Amortization		Net		Gross Asset		Accumulated Amortization		Net
Intellectual property rights	17.9	$	87,630	$	45,739	$	41,891	$	89,619	$	46,286	$	43,333
Customer relationships and backlog	11.9		138,501		68,754		69,747		146,291		66,256		80,035
Drawings	9.5		11,149		9,910		1,239		11,824		10,423		1,401
Other	14.3		49,684		31,095		18,589		52,155		30,697		21,458
Total	14.2	$	286,964	$	155,498	$	131,466	$	299,889	$	153,662	$	146,227