Summary Of Significant Accounting Policies (Major Client's Percentage Contribution To Revenues And Accounts Receivable Balances) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenue, Major Client [Line Items]
Total Revenues, Percentage	9.00%	11.00%	12.00%
Amounts due at December 31, % of accounts receivable balance	less than 1%	less than 1%	less than 1%
Housekeeping Segment [Member]
Revenue, Major Client [Line Items]
Reportable Segment Revenue	11.00%	11.00%	13.00%
Dietary Segment [Member]
Revenue, Major Client [Line Items]
Reportable Segment Revenue	5.00%	9.00%	11.00%