Goodwill and Other Acquisition-Related Intangible Assets Schedule of Net Book Value (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011 Y	Dec. 31, 2010	Dec. 31, 2009
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill, Gross	$ 3,376	$ 3,376
Goodwill, Net	3,376	3,376	3,376
Finite-Lived Intangible Assets, Gross	50,503	48,653
Finite-Lived Intangible Assets, Accumulated Amortization	(28,700)	(22,597)
Finite-Lived Intangible Assets, Net	21,803	26,056
Intangible Assets Finite and Indefinite Lived, Gross (Excluding Goodwill)	51,432	50,018
Intangible Assets, Accumulated Amortization	(28,700)	(22,597)
Intangible Assets, Net (Excluding Goodwill)	22,732	27,421
Intangible Assets Gross Including Goodwill	54,808	53,394	53,094
Intangible Assets Including Goodwill, Accumulated Amortization	(28,700)	(22,597)
Intangible Assets Net Including Goodwill	26,108	30,797
Intangible asset amortization period - minimum (in years)	3
Intangible asset amortization period - maximum (in years)	15
In process research and development-non-amortizing [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets, Gross (Excluding Goodwill)	929	1,365
Indefinite-lived Intangible Assets	929	1,365	2,330
In process research and development-amortizing [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	850	600	0
Finite-Lived Intangible Assets, Accumulated Amortization	(270)	(50)
Finite-Lived Intangible Assets, Net	580	550
Intangible asset amortization period - minimum (in years)	3
Intangible asset amortization period - maximum (in years)	5
Patents trademarks and other [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	49,653	48,053	47,388
Finite-Lived Intangible Assets, Accumulated Amortization	(28,430)	(22,547)
Finite-Lived Intangible Assets, Net	$ 21,223	$ 25,506
Intangible asset amortization period - minimum (in years)	4
Intangible asset amortization period - maximum (in years)	15

Indefinite-Lived Intangible Assets, Gross (Excluding Goodwill)

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Intangible Assets (Excluding Goodwill), Accumulated Amortization

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Intangible Assets Finite and Indefinite Lived, Gross (Excluding Goodwill)

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Intangible Assets Gross (Including Goodwill).

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Intangible Assets Including Goodwill, Accumulated Amortization

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Intangible Assets Net (Including Goodwill).

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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The minimum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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Carrying amount of intangible assets, excluding goodwill, which have a projected indefinite period of benefit (hence are not amortized), allocated to the reportable segment. These assets, acquired either individually or as part of a group of assets, in either an asset acquisition or business combination, are assessed at least annually for impairment. Examples may include trade secrets, contractual rights, trade names, and licensing agreements.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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