SEGMENT INFORMATION - Operating Income of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net service revenue	$ 564,166	$ 485,059	$ 1,101,310	$ 976,744
Other operating income	4,603	22,780	13,304	22,780
Cost of service, excluding depreciation and amortization	308,691	295,228	605,894	580,965
General and administrative expenses	175,300	156,300	347,400	313,000
Depreciation and amortization	6,721	6,334	14,276	11,672
Operating expenses	490,634	457,907	967,630	905,722
Operating income (loss)	78,135	49,932	146,984	93,802
Home Health [Member]
Segment Reporting Information [Line Items]
Net service revenue	349,300	290,200	677,900	593,800
Other operating income	2,300	15,100	7,300	15,100
Cost of service, excluding depreciation and amortization	190,400	184,000	373,400	363,800
General and administrative expenses	81,300	72,200	161,400	147,900
Depreciation and amortization	1,200	900	2,200	1,900
Operating expenses	272,900	257,100	537,000	513,600
Operating income (loss)	78,700	48,200	148,200	95,300
Hospice [Member]
Segment Reporting Information [Line Items]
Net service revenue	197,900	177,100	389,400	346,500
Other operating income	2,300	7,200	6,000	7,200
Cost of service, excluding depreciation and amortization	105,200	97,200	206,800	189,000
General and administrative expenses	48,400	40,900	94,900	79,600
Depreciation and amortization	700	500	1,300	1,100
Operating expenses	154,300	138,600	303,000	269,700
Operating income (loss)	45,900	45,700	92,400	84,000
Personal Care [Member]
Segment Reporting Information [Line Items]
Net service revenue	17,000	17,700	34,000	36,400
Other operating income	0	500	0	500
Cost of service, excluding depreciation and amortization	13,100	14,100	25,700	28,200
General and administrative expenses	3,200	2,900	6,200	6,300
Depreciation and amortization	0	100	100	100
Operating expenses	16,300	17,100	32,000	34,600
Operating income (loss)	700	1,100	2,000	2,300
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	42,400	40,300	84,900	79,200
Depreciation and amortization	4,800	4,800	10,700	8,600
Operating expenses	47,200	45,100	95,600	87,800
Operating income (loss)	$ (47,200)	$ (45,100)	$ (95,600)	$ (87,800)