SEGMENT INFORMATION - Operating Income of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net service revenue	$ 553,485	$ 544,070	$ 1,654,795	$ 1,520,814
Other operating income	(4)	4,812	13,300	27,592
Cost of service, excluding depreciation and amortization	310,294	297,668	916,188	878,633
General and administrative expenses	178,900	179,700	526,400	492,800
Depreciation and amortization	7,487	8,283	21,763	19,955
Operating expenses	496,709	485,569	1,464,339	1,391,291
Operating income (loss)	56,772	63,313	203,756	157,115
Home Health [Member]
Segment Reporting Information [Line Items]
Net service revenue	338,600	326,000	1,016,500	919,800
Other operating income	0	2,600	7,300	17,700
Cost of service, excluding depreciation and amortization	190,100	180,000	563,500	543,800
General and administrative expenses	82,400	78,800	243,800	226,700
Depreciation and amortization	1,100	1,000	3,300	2,900
Operating expenses	273,600	259,800	810,600	773,400
Operating income (loss)	65,000	68,800	213,200	164,100
Hospice [Member]
Segment Reporting Information [Line Items]
Net service revenue	197,500	199,700	586,900	546,200
Other operating income	0	1,700	6,000	8,900
Cost of service, excluding depreciation and amortization	107,600	104,100	314,400	293,100
General and administrative expenses	49,500	47,800	144,400	127,400
Depreciation and amortization	700	600	2,000	1,700
Operating expenses	157,800	152,500	460,800	422,200
Operating income (loss)	39,700	48,900	132,100	132,900
Personal Care [Member]
Segment Reporting Information [Line Items]
Net service revenue	15,900	18,400	49,900	54,800
Other operating income	0	500	0	1,000
Cost of service, excluding depreciation and amortization	11,700	13,500	37,400	41,700
General and administrative expenses	2,600	3,200	8,800	9,500
Depreciation and amortization	100	0	200	100
Operating expenses	14,400	16,700	46,400	51,300
Operating income (loss)	1,500	2,200	3,500	4,500
High Acuity Care
Segment Reporting Information [Line Items]
Net service revenue	1,500	0	1,500	0
Other operating income	0	0	0	0
Cost of service, excluding depreciation and amortization	900	0	900	0
General and administrative expenses	3,900	0	3,900	0
Depreciation and amortization	500	0	500	0
Operating expenses	5,300	0	5,300	0
Operating income (loss)	(3,800)	0	(3,800)	0
Other
Segment Reporting Information [Line Items]
Net service revenue	0	0	0	0
Other operating income	0	0	0	0
Cost of service, excluding depreciation and amortization	0	0	0	0
General and administrative expenses	40,500	49,900	125,500	129,200
Depreciation and amortization	5,100	6,700	15,800	15,200
Operating expenses	45,600	56,600	141,300	144,400
Operating income (loss)	$ (45,600)	$ (56,600)	$ (141,300)	$ (144,400)