SEGMENT INFORMATION - Operating Income of Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net service revenue	$ 2,214,112	$ 2,071,519	$ 1,955,633
Other operating income	13,300	34,372	0
Cost of service, excluding depreciation and amortization	1,233,356	1,185,369	1,150,337
General and administrative expenses	711,200	668,200	607,900
Depreciation and amortization	30,901	28,802	18,428
Asset impairment charge	0	4,152	1,470
Operating expenses	1,975,497	1,886,623	1,778,161
Operating income (loss)	251,915	219,268	177,472
Home Health [Member] | Reportable Business Segments [Member]
Segment Reporting Information [Line Items]
Net service revenue	1,353,800	1,249,200	1,256,400
Other operating income	7,300	20,200
Cost of service, excluding depreciation and amortization	756,600	729,900	754,100
General and administrative expenses	328,500	307,200	297,200
Depreciation and amortization	4,300	3,900	4,200
Asset impairment charge		3,400	1,500
Operating expenses	1,089,400	1,044,400	1,057,000
Operating income (loss)	271,700	225,000	199,400
Hospice [Member] | Reportable Business Segments [Member]
Segment Reporting Information [Line Items]
Net service revenue	791,800	750,100	617,200
Other operating income	6,000	13,100
Cost of service, excluding depreciation and amortization	425,200	400,600	335,100
General and administrative expenses	198,400	175,400	137,500
Depreciation and amortization	2,700	2,200	1,600
Asset impairment charge		800	0
Operating expenses	626,300	579,000	474,200
Operating income (loss)	171,500	184,200	143,000
Personal Care [Member]
Segment Reporting Information [Line Items]
Other operating income		1,000
Personal Care [Member] | Reportable Business Segments [Member]
Segment Reporting Information [Line Items]
Net service revenue	65,000	72,200	82,000
Other operating income	0	1,100
Cost of service, excluding depreciation and amortization	49,100	54,900	61,100
General and administrative expenses	11,200	12,400	12,300
Depreciation and amortization	200	200	200
Asset impairment charge		0	0
Operating expenses	60,500	67,500	73,600
Operating income (loss)	4,500	5,800	8,400
High Acuity Care [Member] | Reportable Business Segments [Member]
Segment Reporting Information [Line Items]
Net service revenue	3,500	0	0
Other operating income	0	0
Cost of service, excluding depreciation and amortization	2,500	0	0
General and administrative expenses	10,000	0	0
Depreciation and amortization	1,300	0	0
Asset impairment charge		0	0
Operating expenses	13,800	0	0
Operating income (loss)	(10,300)	0	0
Other [Member] | Other Segment [Member]
Segment Reporting Information [Line Items]
Net service revenue	0	0	0
Other operating income	0	0
Cost of service, excluding depreciation and amortization	0	0	0
General and administrative expenses	163,100	173,200	160,900
Depreciation and amortization	22,400	22,500	12,400
Asset impairment charge		0	0
Operating expenses	185,500	195,700	173,300
Operating income (loss)	$ (185,500)	$ (195,700)	$ (173,300)