Segment Information (Revenues And Income Before Income Taxes) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Revenues	$ 218,929,000		$ 195,114,000		$ 638,826,000		$ 571,868,000
Income before income taxes	15,189,000		13,424,000		42,245,000		39,682,000
Housekeeping Services [Member]
Revenues	164,095,000		151,265,000		479,238,000		441,680,000
Income before income taxes	14,707,000		14,040,000		48,097,000		43,390,000
Dietary Services [Member]
Revenues	54,582,000		43,771,000		159,136,000		130,145,000
Income before income taxes	2,663,000		1,558,000		8,653,000		5,867,000
Corporate And Eliminations [Member]
Revenues	252,000	[1]	78,000	[1]	452,000	[1]	43,000	[1]
Income before income taxes	$ (2,181,000)	[1]	$ (2,174,000)	[1]	$ (14,505,000)	[1]	$ (9,575,000)	[1]

[1] Represents primarily corporate office cost and related overhead, recording of transactions at the reportable segment level which use methods other than U.S. GAAP and consolidated subsidiaries' operating expenses that are not allocated to the reportable segments, net of investment and interest income (loss).