BUSINESS SEGMENTS - Schedule of Service Revenue by Major Payor Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 1,036,285	$ 921,345	$ 2,046,457	$ 1,808,186
Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	991,285	884,200	1,960,887	1,735,123
Service revenue
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 1,030,574	$ 916,101	$ 2,035,059	$ 1,798,019
Service revenue \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	100.00%	100.00%	100.00%	100.00%
Service revenue \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 991,285	$ 884,200	$ 1,960,887	$ 1,735,123
Service revenue \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	39,289	31,901	74,172	62,896
Service revenue \| Total Medicaid and Medicare
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 733,598	$ 669,877	$ 1,452,653	$ 1,315,791
Service revenue \| Total Medicaid and Medicare \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	71.20%	73.10%	71.40%	73.20%
Service revenue \| Total Medicaid and Medicare \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 724,965	$ 662,476	$ 1,435,975	$ 1,301,571
Service revenue \| Total Medicaid and Medicare \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	8,633	7,401	16,678	14,220
Service revenue \| Medicaid
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 411,760	$ 359,781	$ 801,923	$ 700,045
Service revenue \| Medicaid \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	40.00%	39.30%	39.40%	38.90%
Service revenue \| Medicaid \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 403,127	$ 352,380	$ 785,245	$ 685,825
Service revenue \| Medicaid \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	8,633	7,401	16,678	14,220
Service revenue \| Medicare
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 258,869	$ 248,081	$ 524,452	$ 495,804
Service revenue \| Medicare \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	25.10%	27.10%	25.80%	27.60%
Service revenue \| Medicare \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 258,869	$ 248,081	$ 524,452	$ 495,804
Service revenue \| Medicare \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	0	0	0	0
Service revenue \| Medicaid-skilled
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 62,969	$ 62,015	$ 126,278	$ 119,942
Service revenue \| Medicaid-skilled \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	6.10%	6.70%	6.20%	6.70%
Service revenue \| Medicaid-skilled \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 62,969	$ 62,015	$ 126,278	$ 119,942
Service revenue \| Medicaid-skilled \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	0	0	0	0
Service revenue \| Managed care
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 191,022	$ 161,101	$ 379,126	$ 317,764
Service revenue \| Managed care \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	18.50%	17.60%	18.60%	17.70%
Service revenue \| Managed care \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 191,022	$ 161,101	$ 379,126	$ 317,764
Service revenue \| Managed care \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	0	0	0	0
Service revenue \| Private and other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 105,954	$ 85,123	$ 203,280	$ 164,464
Service revenue \| Private and other \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	10.30%	9.30%	10.00%	9.10%
Service revenue \| Private and other \| Operating Segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 75,298	$ 60,623	$ 145,786	$ 115,788
Service revenue \| Private and other \| All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 30,656	$ 24,500	$ 57,494	$ 48,676