BUSINESS SEGMENTS - Schedule of Service Revenue by Major Payor Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 1,289,779	$ 1,076,092	$ 3,678,233	$ 3,111,151
Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	100.00%	100.00%	100.00%	100.00%
Total Medicaid and Medicare
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 896,888	$ 755,143	$ 2,560,202	$ 2,207,796
Total Medicaid and Medicare \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	69.50%	70.20%	69.60%	71.00%
Medicaid
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 515,157	$ 425,642	$ 1,454,845	$ 1,227,565
Medicaid \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	39.90%	39.60%	39.60%	39.50%
Medicare
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 303,281	$ 263,594	$ 882,149	$ 788,046
Medicare \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	23.50%	24.50%	24.00%	25.30%
Medicaid-skilled
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 78,450	$ 65,907	$ 223,208	$ 192,185
Medicaid-skilled \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	6.10%	6.10%	6.00%	6.20%
Managed care
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 237,978	$ 202,528	$ 694,690	$ 581,654
Managed care \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	18.50%	18.80%	18.90%	18.70%
Private and other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 154,913	$ 118,421	$ 423,341	$ 321,701
Private and other \| Revenue \| Customer Concentration Risk
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue %	12.00%	11.00%	11.50%	10.30%
Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 1,239,096	$ 1,033,113	$ 3,536,226	$ 2,994,000
Operating segments \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	1,239,096	1,033,113	3,536,226	2,994,000
Operating segments \| Total Medicaid and Medicare \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	883,453	745,691	2,524,394	2,181,666
Operating segments \| Medicaid \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	501,722	416,190	1,419,037	1,201,435
Operating segments \| Medicare \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	303,281	263,594	882,149	788,046
Operating segments \| Medicaid-skilled \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	78,450	65,907	223,208	192,185
Operating segments \| Managed care \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	237,978	202,528	694,690	581,654
Operating segments \| Private and other \| Skilled Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	117,665	84,894	317,142	230,680
All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	50,683	42,979	142,007	117,151
All Other \| Total Medicaid and Medicare
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	13,435	9,452	35,808	26,130
All Other \| Medicaid
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	13,435	9,452	35,808	26,130
All Other \| Medicare
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	0	0	0	0
All Other \| Medicaid-skilled
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	0	0	0	0
All Other \| Managed care
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	0	0	0	0
All Other \| Private and other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Service Revenue	$ 37,248	$ 33,527	$ 106,199	$ 91,021