Goodwill and Intangible Assets Finite-lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,730	$ 13,059
Accumulated Amortization	(824)	(13,059)
Net Carrying Amount	7,906
Total intangible amortization expense	824	255	254
Developed and core technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,400	8,718
Accumulated Amortization	(330)	(8,718)
Net Carrying Amount	4,070
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,000	1,455
Accumulated Amortization	(225)	(1,455)
Net Carrying Amount	2,775
Patents and trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	510	2,886
Accumulated Amortization	(115)	(2,886)
Net Carrying Amount	395
Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	410
Accumulated Amortization	(154)
Net Carrying Amount	256
In-process research and development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	410
Accumulated Amortization
Net Carrying Amount	$ 410
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	2 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years