Summary Of Significant Accounting Policies (Schedule Of Estimated Useful Lives Of Property And Equipment) (Details)	12 Months Ended
	Dec. 31, 2011
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	Lesser of life of lease or expected useful life
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	39
Equipment And Furniture [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum	3
Estimated useful lives, maximum	7
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum	5
Estimated useful lives, maximum	10
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum	3
Estimated useful lives, maximum	7