Goodwill and Other Intangible Assets Finite life intangibles Gross and Net at balance sheet dates (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 90,052	$ 6,249
Finite-Lived Intangible Assets, Accumulated Amortization	3,818	2,018
Finite-Lived Intangible Assets, Net	86,234	4,231	[1]
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	54,330	4,230
Finite-Lived Intangible Assets, Accumulated Amortization	2,539	1,591
Finite-Lived Intangible Assets, Net	51,791	2,639
acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	27,580	980
Finite-Lived Intangible Assets, Accumulated Amortization	760	175
Finite-Lived Intangible Assets, Net	26,820	805
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,192	889
Finite-Lived Intangible Assets, Accumulated Amortization	214	190
Finite-Lived Intangible Assets, Net	978	699
Finite-Lived Intangible Asset, Useful Life	20 years
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	6,890	90
Finite-Lived Intangible Assets, Accumulated Amortization	265	37
Finite-Lived Intangible Assets, Net	6,625	53
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	60	60
Finite-Lived Intangible Assets, Accumulated Amortization	40	25
Finite-Lived Intangible Assets, Net	$ 20	$ 35
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member] | acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years
Maximum [Member] | acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Maximum [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years

[1] Information derived from our December 31, 2011 audited Consolidated Financial Statements.