Segment Information - Schedule of Information of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 496,408	$ 506,871	$ 503,732	$ 501,810	$ 499,410	$ 491,355	$ 470,876	$ 404,490	$ 2,008,821	$ 1,866,131	$ 1,562,662
Income before income taxes	35,007	$ 32,982	$ 33,316	$ (1,395)	34,678	$ 32,930	$ 33,078	$ 32,279	99,910	132,965	120,387
Depreciation and amortization									9,272	8,886	7,496
Total assets	692,603				676,003				692,603	676,003	528,446
Capital expenditures									4,940	5,397	5,442
Customer Concentration Risk | Revenue from Contract with Customer | Genesis
Segment Reporting Information [Line Items]
Revenues									$ 386,700	$ 327,500
Concentration risk, percentage									19.30%	17.50%
Housekeeping services
Segment Reporting Information [Line Items]
Revenues									$ 973,800	$ 979,600	957,100
Dietary services
Segment Reporting Information [Line Items]
Revenues									1,035,000	886,500	605,500
Operating Segments | Housekeeping services
Segment Reporting Information [Line Items]
Revenues									973,826	979,610	957,148
Income before income taxes									108,305	95,505	90,756
Depreciation and amortization									6,315	6,547	6,535
Total assets	291,117				304,303				291,117	304,303	266,464
Capital expenditures									3,996	4,287	4,612
Operating Segments | Dietary services
Segment Reporting Information [Line Items]
Revenues									1,034,995	886,521	605,514
Income before income taxes									60,562	46,008	34,641
Depreciation and amortization									2,433	1,813	439
Total assets	235,183				242,874				235,183	242,874	127,187
Capital expenditures									690	663	410
Corporate and eliminations
Segment Reporting Information [Line Items]
Revenues									0	0	0
Income before income taxes									(68,957)	(8,548)	(5,010)
Depreciation and amortization									524	526	522
Total assets	$ 166,303				$ 128,826				166,303	128,826	134,795
Capital expenditures									$ 254	$ 447	$ 420