Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	$ 147,381		$ 147,381		$ 147,092
Accumulated amortization of customer relationships and intellectual property bundles	(9,994)		(9,994)		(6,827)
Intangible Assets, Net (Excluding Goodwill)	137,387		137,387		140,265
Amortization [Abstract]
Amortization of Acquired Intangible Assets, Change in Period due to Purchase Accounting Adjustments		121		279
Amortization of intangible assets	1,584	1,583	3,167	3,129
Customer relationships
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	49,188		49,188		49,188
Intellectual property bundles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	77,476		77,476		77,476
Patents
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	1,376		1,376		1,087
Trademarks
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 19,341		$ 19,341		$ 19,341