Segment Information (Revenues By Client Services) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue from External Customer [Line Items]
Revenues	$ 360,165	$ 320,099	$ 1,070,767	$ 951,559
Housekeeping Services
Revenue from External Customer [Line Items]
Revenues	158,019	147,812	471,692	437,358
Laundry and Linen Services
Revenue from External Customer [Line Items]
Revenues	69,060	63,241	207,887	188,766
Dietary Services
Revenue from External Customer [Line Items]
Revenues	132,405	108,547	389,461	323,909
Maintenance Services and Other
Revenue from External Customer [Line Items]
Revenues	$ 681	$ 499	$ 1,727	$ 1,526