Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Commitments and Contingencies (Textual) [Abstract]
Rent expense	$ 1.1	$ 0.5	$ 1.9	$ 1.8
Commitments and Contingencies (Additional Textual) [Abstract]
Termination fee				0.7
Cost of revenues [Member]
Commitments and Contingencies (Textual) [Abstract]
Rent expense	$ 3.0	$ 1.5	$ 5.7	$ 2.7