SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information3 (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2021	Dec. 31, 2022	Jan. 20, 2022
Property, Plant and Equipment [Line Items]
Goodwill	$ 679,463,000	$ 513,820,000	$ 677,665,000
Indefinite lived intangible assets	9,000,000		24,100,000
Lease abandonment charges	5,100,000	19,700,000
Workers' compensation liability, current	3,400,000		3,900,000
Medical malpractice deductible per incidence	10,000
Blue Shield | Minimum
Property, Plant and Equipment [Line Items]
Stop loss policy claim amount	250,000
Blue Shield | Maximum
Property, Plant and Equipment [Line Items]
Stop loss policy claim amount	1,000,000
Reinsurance Policy, Type [Axis]: Health Insurance Member
Property, Plant and Equipment [Line Items]
Self-insurance accrual	7,200,000		$ 7,400,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Impairment of long lived asset	2,500,000	7,100,000
Impairment loss	2,700,000	$ 12,600,000
Aidence
Property, Plant and Equipment [Line Items]
Goodwill				$ 22,900,000
Impairment of intangible assets	$ 3,900,000