DISCONTINUED OPERATIONS - Narrative (Details) - Bright Healthcare – Commercial Segment - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts payable	$ 1,200	$ 47,100
Discontinued Operations | Broker Commissions Payable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Broker commissions payable	200	21,100
Discontinued Operations | Contract Termination Costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract termination costs	28,500	28,500
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Risk adjustment payable	1,948,043	1,943,890
Discontinued Operations | Level 1
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and short-term investments	1,200,000	940,500
Discontinued Operations | Level 2
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and short-term investments	$ 206,200	$ 802,700