Goodwill and Other Acquisition-Related Intangible Assets Schedule of Net Book Value (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill	$ 4,391	$ 3,376
Finite-Lived Intangible Assets, Gross	57,522	50,503
Finite-Lived Intangible Assets, Accumulated Amortization	(35,209)	(28,700)
Finite-Lived Intangible Assets, Net	22,313	21,803
Intangible Assets Finite and Indefinite Lived, Gross (Excluding Goodwill)	58,372	51,432
Intangible Assets, Accumulated Amortization	(35,209)	(28,700)
Intangible Assets, Net (Excluding Goodwill)	23,163	22,732
Intangible Assets Gross Including Goodwill	62,763	54,808	53,394
Intangible Assets Including Goodwill, Accumulated Amortization	(35,209)	(28,700)
Intangible Assets Net Including Goodwill	27,554	26,108
Maximum [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	15 years
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)	850	929	1,365
Indefinite-lived Intangible Assets	850	929
Goodwill
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill, Gross	4,391	3,376	3,376
Goodwill	4,391	3,376
In process research and development-amortizing [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,779	850	600
Finite-Lived Intangible Assets, Accumulated Amortization	(658)	(270)
Finite-Lived Intangible Assets, Net	1,121	580
Finite-Lived Intangible Assets, Useful Life	3 years
In process research and development-amortizing [Member] | Minimum [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	3 years
In process research and development-amortizing [Member] | Maximum [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	5 years
Patents, trademarks, developed technology and other
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	55,743	49,653	48,053
Finite-Lived Intangible Assets, Accumulated Amortization	(34,551)	(28,430)
Finite-Lived Intangible Assets, Net	$ 21,192	$ 21,223
Patents, trademarks, developed technology and other | Minimum [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	4 years
Patents, trademarks, developed technology and other | Maximum [Member]
Goodwill And Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	15 years