Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2011 Y Entities	Dec. 31, 2010	Dec. 31, 2009
Accounting Policies [Abstract]
Variable Interest Entity, Unavailability of Information, Number of Entities		1
Maximum Maturity Period Of Temporary Cash and Cash Equivalents		3
Property, Plant and Equipment, Useful Life, Minimum		1
Property, Plant and Equipment, Useful Life, Maximum		7
Finite-Lived Intangible Assets, Useful Life, Minimum		1
Finite-Lived Intangible Assets, Useful Life, Maximum		25
Capitalized Computer Software, Amortization		$ 0	$ 200,000	$ 100,000
Capitalized Computer Software, Impairments			100,000	100,000
Capitalized Computer Software, Net		0	0
Goodwill, Impairment Loss	$ 0
Probability Threshold For Recognized Tax Benefit		50.00%
Software Development [Member]
Goodwill and Other Intangibles [Line Items]
Finite-Lived Intangible Assets, Useful Life		5