Summary Of Significant Accounting Policies (Schedule Of Property, Software And Equipment Depreciation Periods) (Details)	12 Months Ended
	Dec. 31, 2011 years
Buildings And Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed Asset - Depreciation Period, Minimum, Years	5
Fixed Asset - Depreciation Period, Maximum, Years	40
Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Fixed Asset - Depreciation Period, Minimum, Years	3
Fixed Asset - Depreciation Period, Maximum, Years	10
Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Fixed Asset - Depreciation Period, Minimum, Years	5
Fixed Asset - Depreciation Period, Maximum, Years	10
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed Asset - Depreciation Period, Minimum, Years	1
Fixed Asset - Depreciation Period, Maximum, Years	20