Segment Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Sales revenue
Net service revenues	$ 200,733	$ 155,996	$ 402,045	$ 309,694
Operating income before corporate expenses	24,591	19,038	47,944	37,077
Operating income (loss) before noncontrolling interest	7,527	8,027	11,935	14,621
Corporate expenses	9,336	6,951	18,394	14,645
Deal transition and other	5,424	2,589	12,655	5,198
Operating income	9,831	9,498	16,895	17,234
Interest expense, net	1,579	1,604	3,475	2,936
Net income (loss) attributable to noncontrolling interests	725	(133)	1,485	(323)
Income before income taxes	7,527	8,027	11,935	14,621
Home Health
Sales revenue
Net service revenues	148,373	110,340	299,528	219,762
Operating income before corporate expenses	20,213	15,267	40,095	30,308
Interest expense, net	686	440	1,631	798
Other Home Based Care
Sales revenue
Net service revenues	46,519	40,012	92,117	79,896
Operating income before corporate expenses	4,051	3,051	7,865	6,722
Interest expense, net			501	798
Personal Care
Sales revenue
Interest expense, net	212	440
Healthcare Innovations
Sales revenue
Net service revenues	5,841	5,644	10,400	10,036
Operating income before corporate expenses	327	720	(16)	47
Interest expense, net	$ 160	$ 333	$ 354	$ 711
Medicare program
Segment data
Segment revenues (as a percent)	92.00%		92.00%
Medicare program | Home Health
Segment data
Segment revenues (as a percent)	95.00%		95.00%
Medicaid and other government programs | Personal Care
Segment data
Segment revenues (as a percent)	79.00%		79.00%