Segment Information - Revenues by Client Services (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue from External Customer [Line Items]
Revenues	$ 386,556	$ 355,356	$ 771,363	$ 710,602
Housekeeping Services
Revenue from External Customer [Line Items]
Revenues	169,362	157,086	338,278	313,673
Dietary Services
Revenue from External Customer [Line Items]
Revenues	148,265	128,391	294,793	257,056
Laundry and Linen Services
Revenue from External Customer [Line Items]
Revenues	68,452	69,339	137,166	138,827
Maintenance Services and Other
Revenue from External Customer [Line Items]
Revenues	$ 477	$ 540	$ 1,126	$ 1,046