Segment Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Sales revenue
Net service revenues	$ 194,302	$ 160,421	$ 596,347	$ 470,114
Operating income before corporate expenses	21,383	20,209	69,327	57,285
Operating income (loss) before noncontrolling interest	5,358	8,560	17,293	23,180
Corporate expenses	9,329	6,843	27,072	21,277
Deal transition and other	4,467	2,257	17,122	7,455
Operating income	7,587	11,109	25,133	28,553
Interest expense, net	1,668	1,537	5,794	4,684
Net income attributable to noncontrolling interests	561	1,012	2,046	689
Net income before income taxes	5,358	8,560	17,293	23,180
Home Health
Sales revenue
Net service revenues	141,434	108,138	440,962	327,899
Operating income before corporate expenses	16,992	12,657	57,087	42,964
Interest expense, net	643	384	2,274	1,183
Other Home Based Care
Sales revenue
Net service revenues	46,378	41,975	138,495	121,871
Operating income before corporate expenses	3,579	2,501	11,444	9,223
Interest expense, net			705	1,183
Personal Care
Sales revenue
Interest expense, net	204	384
Healthcare Innovations
Sales revenue
Net service revenues	6,490	10,308	16,890	20,344
Operating income before corporate expenses	812	5,051	796	5,098
Interest expense, net	$ 154	$ 248	$ 508	$ 960
Medicare program
Segment data
Segment revenues (as a percent)	93.00%		93.00%
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)	80.00%		80.00%