SEGMENT INFORMATION - Operating Income of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net service revenue	$ 492,984	$ 411,603	$ 960,324	$ 810,865
Cost of service, excluding depreciation and amortization	290,752	242,564	566,026	480,873
General and administrative expenses	152,300	123,100	297,100	244,500
Depreciation and amortization	5,179	3,125	8,074	6,718
Operating expenses	448,233	368,775	871,249	732,032
Operating income	44,751	42,828	89,075	78,833
Home Health
Segment Reporting Information [Line Items]
Net service revenue	318,600	291,500	628,700	575,600
Cost of service, excluding depreciation and amortization	187,800	176,500	373,500	350,900
General and administrative expenses	74,000	68,400	145,400	136,400
Depreciation and amortization	1,100	800	2,100	1,600
Operating expenses	262,900	245,700	521,000	488,900
Operating income	55,700	45,800	107,700	86,700
Hospice
Segment Reporting Information [Line Items]
Net service revenue	153,200	101,400	290,200	198,700
Cost of service, excluding depreciation and amortization	87,300	51,700	161,400	101,800
General and administrative expenses	34,900	20,300	63,900	40,300
Depreciation and amortization	400	300	800	500
Operating expenses	122,600	72,300	226,100	142,600
Operating income	30,600	29,100	64,100	56,100
Personal Care
Segment Reporting Information [Line Items]
Net service revenue	21,200	18,700	41,400	36,600
Cost of service, excluding depreciation and amortization	15,600	14,400	31,100	28,200
General and administrative expenses	3,200	3,300	6,300	6,500
Depreciation and amortization	0	0	100	100
Operating expenses	18,800	17,700	37,500	34,800
Operating income	2,400	1,000	3,900	1,800
Other
Segment Reporting Information [Line Items]
Net service revenue	0	0	0	0
Cost of service, excluding depreciation and amortization	0	0	0	0
General and administrative expenses	40,200	31,100	81,500	61,300
Depreciation and amortization	3,700	2,000	5,100	4,500
Operating expenses	43,900	33,100	86,600	65,800
Operating income	$ (43,900)	$ (33,100)	$ (86,600)	$ (65,800)