Significant Accounting Policies (Useful Lives Of Each Class Of Assets) (Details)	12 Months Ended
	Dec. 31, 2011 years
Building And Site Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life, minimum	2
Property and equipment useful life, maximum	31
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life, minimum	2
Property and equipment useful life, maximum	11
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life, minimum	5
Property and equipment useful life, maximum	10
Computer Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life, minimum	3
Property and equipment useful life, maximum	10