Segment Information (Revenues By Client Services) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue from External Customer [Line Items]
Revenues	$ 355,356	$ 319,295	$ 710,602	$ 631,460
Housekeeping Services
Revenue from External Customer [Line Items]
Revenues	157,086	148,606	313,673	289,546
Laundry and Linen Services
Revenue from External Customer [Line Items]
Revenues	69,339	62,255	138,827	125,525
Dietary Services
Revenue from External Customer [Line Items]
Revenues	128,391	107,938	257,056	215,362
Maintenance Services and Other
Revenue from External Customer [Line Items]
Revenues	$ 540	$ 496	$ 1,046	$ 1,027