Summary Of Significant Accounting Policies (Schedule Of Estimated Useful Lives Of Assets) (Details)	12 Months Ended
	Dec. 31, 2011
Building And Improvements [Member]
Estimated Useful Lives Of Assets [Line Items]
Estimated useful lives of assets, minimum	1
Estimated useful lives of assets, maximum	39
Medical Rental Equipment [Member]
Estimated Useful Lives Of Assets [Line Items]
Estimated useful lives of assets, minimum	1.5
Estimated useful lives of assets, maximum	11
Other Equipment And Furniture [Member]
Estimated Useful Lives Of Assets [Line Items]
Estimated useful lives of assets, minimum	3
Estimated useful lives of assets, maximum	25