SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Service Fee Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue from External Customer [Line Items]
Total consolidated revenues	$ 1,829,664	$ 1,616,630	$ 1,430,061
Commercial insurance
Revenue from External Customer [Line Items]
Total consolidated revenues	1,018,327	879,792	769,753
Medicare
Revenue from External Customer [Line Items]
Total consolidated revenues	410,072	356,506	305,031
Medicaid
Revenue from External Customer [Line Items]
Total consolidated revenues	44,736	42,302	37,530
Workers' compensation/personal injury
Revenue from External Customer [Line Items]
Total consolidated revenues	43,666	46,406	50,333
Other payors
Revenue from External Customer [Line Items]
Total consolidated revenues	104,888	87,675	65,911
Management fee revenue
Revenue from External Customer [Line Items]
Total consolidated revenues	24,676	17,936	22,235
Other revenue
Revenue from External Customer [Line Items]
Total consolidated revenues	46,724	32,580	27,223
Revenue under capitation arrangements
Revenue from External Customer [Line Items]
Total consolidated revenues	$ 136,575	$ 153,433	$ 152,045