Goodwill and Intangibles (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Intangible assets and accumulated amortization balances
Gross Carrying Amount	$ 156,111	$ 155,682
Accumulated Amortization	(35,086)	(23,991)
Net Carrying Amount	121,025	131,691
Weighted Average Useful Life (Years)	7 years 4 months 24 days	8 years 1 month 6 days
Customer Relationships [Member]
Intangible assets and accumulated amortization balances
Gross Carrying Amount	136,006	138,576
Accumulated Amortization	(30,902)	(21,267)
Net Carrying Amount	105,104	117,309
Weighted Average Useful Life (Years)	7 years 10 months 24 days	8 years 7 months 6 days
Developed technology [Member]
Intangible assets and accumulated amortization balances
Gross Carrying Amount	9,469	9,503
Accumulated Amortization	(3,702)	(2,521)
Net Carrying Amount	5,767	6,982
Weighted Average Useful Life (Years)	4 years 1 month 6 days	4 years 9 months 18 days
Other [Member]
Intangible assets and accumulated amortization balances
Gross Carrying Amount	10,636	7,603
Accumulated Amortization	(482)	(203)
Net Carrying Amount	$ 10,154	$ 7,400