Goodwill and Other Acquision-Related Intangible Assets Schedule of Changes in Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Intangible Assets Including Goodwill [Roll Forward]
Goodwill	$ 3,376	$ 3,376
Finite-Lived Intangible Assets, Net	48,653
Intangible Assets Gross Including Goodwill	53,394	53,094
Goodwill, Period Increase (Decrease)	0	0
Intangible Assets Including Goodwill, Period Increase (Decrease)	1,414	300
Goodwill	3,376	3,376
Finite-Lived Intangible Assets, Net	50,503	48,653
Intangible Assets Gross Including Goodwill	54,808	53,394
In process research and development-non-amortizing [Member]
Intangible Assets Including Goodwill [Roll Forward]
Indefinite-lived Intangible Assets	1,365	2,330
Indefinite-lived Intangible Assets, Period Increase (Decrease)	(436)	(965)
Indefinite-lived Intangible Assets	929	1,365
In process research and development-amortizing [Member]
Intangible Assets Including Goodwill [Roll Forward]
Finite-Lived Intangible Assets, Net	600	0
Finite-lived Intangible Assets, Period Increase (Decrease)	250	600
Finite-Lived Intangible Assets, Net	850	600
Patents trademarks and other [Member]
Intangible Assets Including Goodwill [Roll Forward]
Finite-Lived Intangible Assets, Net	48,053	47,388
Finite-lived Intangible Assets, Period Increase (Decrease)	1,600	665
Finite-Lived Intangible Assets, Net	$ 49,653	$ 48,053

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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-Publisher FASB

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-Number 141R

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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+ Details

- Definition

The change during the reporting period in the carrying value of goodwill. The change could be the result of new goodwill acquired, goodwill impairment during the period, goodwill written off related to the sale of a business or other adjustments to goodwill.

+ References+ Details