INVESTMENTS (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Variable Interest Entity [Line Items]
Minimum ownership percentage for controlling interest (percent)		50.00%
Maximum ownership percentage for equity method investment (percent)		50.00%
Equity method investment, aggregate cost		$ 45,900		$ 40,500
Maximum ownership percentage for cost method investment (percent)		20.00%
Purchase of cost method investment	$ 15,000	$ 0	$ 15,000
Investment Owned, at Cost		20,000		20,000
Cash and cash equivalents		95,377		40,540
Patient accounts receivable		278,785		296,785
Other current assets		22,824		26,415
Total current assets		426,544		388,961
Property and equipment		36,399		16,026
Operating lease right of use assets		85,142		102,856
Goodwill		1,244,679		1,287,399
Intangible assets		104,744		101,167
Other assets		84,894		79,836
Total assets		1,982,402		1,976,245
Accounts payable		38,557		43,735
Payroll and employee benefits		123,234		125,387
Accrued expenses		137,359		137,390
Operating lease liabilities		25,786		33,521
Total liabilities		921,645		869,672
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents		9,400		15,600
Patient accounts receivable		5,000		6,100
Other current assets		200		600
Total current assets		14,600		22,300
Property and equipment		100		100
Operating lease right of use assets		100		100
Goodwill		8,500		8,500
Intangible assets		400		400
Other assets		200		200
Total assets		23,900		31,600
Accounts payable		500		100
Payroll and employee benefits		800		500
Accrued expenses		6,800		5,800
Operating lease liabilities		0		100
Current portion of long-term obligations		200		200
Total liabilities		$ 8,300		$ 6,700