Summary of Significant Accounting Policies (Details 1) (Trademarks, local brands, and non-compete agreements [Member])	12 Months Ended
	Dec. 31, 2011 years
Trademarks, local brands, and non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Minimum useful life of finite-lived intangible assets (in years)	5
Maximum useful life of finite-lived intangible assets (in years)	40