Segment Information (Revenues By Client Services) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue from External Customer [Line Items]
Revenues	$ 298,549	$ 272,681	$ 846,057	$ 800,396
Housekeeping Services [Member]
Revenue from External Customer [Line Items]
Revenues	132,340	124,049	381,284	367,599
Laundry and Linen Services [Member]
Revenue from External Customer [Line Items]
Revenues	60,480	60,846	180,782	179,621
Dietary Services [Member]
Revenue from External Customer [Line Items]
Revenues	105,023	86,528	281,147	249,735
Maintenance Services and Other [Member]
Revenue from External Customer [Line Items]
Revenues	$ 706	$ 1,258	$ 2,844	$ 3,441