Segment Information (Revenues By Client Services) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue from External Customer [Line Items]
Revenues	$ 273,604	$ 267,108	$ 547,508	$ 527,715
Housekeeping Services [Member]
Revenue from External Customer [Line Items]
Revenues	123,351	121,897	248,944	243,550
Laundry and Linen Services [Member]
Revenue from External Customer [Line Items]
Revenues	59,404	60,245	120,302	118,775
Dietary Services [Member]
Revenue from External Customer [Line Items]
Revenues	89,850	83,816	176,124	163,206
Maintenance Services and Other [Member]
Revenue from External Customer [Line Items]
Revenues	$ 999	$ 1,150	$ 2,138	$ 2,184