Segment Information - Schedule Of Information Of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues									$ 1,562,662	$ 1,436,849	$ 1,293,183
Income before income taxes	$ 30,529	$ 30,571	$ 29,683	$ 29,604	$ 11,712	$ 26,741	$ 26,257	$ 25,054	120,387	89,764	31,708
Depreciation and amortization									7,496	7,660	7,269
Total assets	528,446				480,949				528,446	480,949	469,579
Capital expenditures									5,442	4,998	5,795
Operating Segments | Housekeeping services
Segment Reporting Information [Line Items]
Revenues									957,148	909,709	846,610
Income before income taxes									90,756	84,471	70,390
Depreciation and amortization									6,535	6,488	6,114
Total assets	266,464				228,116				266,464	228,116	223,440
Capital expenditures									4,612	3,586	4,375
Operating Segments | Dietary services
Segment Reporting Information [Line Items]
Revenues									605,514	527,140	446,573
Income before income taxes									34,641	31,612	26,343
Depreciation and amortization									439	685	662
Total assets	127,187				104,797				127,187	104,797	95,861
Capital expenditures									410	336	391
Corporate and eliminations
Segment Reporting Information [Line Items]
Revenues									0	0	0
Income before income taxes									(5,010)	(26,319)	(65,025)
Depreciation and amortization									522	487	493
Total assets	$ 134,795				$ 148,036				134,795	148,036	150,278
Capital expenditures									$ 420	$ 1,076	$ 1,029