DISCONTINUED OPERATIONS - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended
	Sep. 30, 2023	Mar. 31, 2024	Jan. 01, 2024	Dec. 31, 2023	Dec. 13, 2023	Jun. 30, 2023
Centers for Medicare & Medicaid Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayment aggregate amount	$ 380,200
Repayment period	18 months
Interest rate	11.50%
Discontinued Operations | California Medicare Advantage Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration			$ 500,000		$ 500,000	$ 600,000
Total consideration subject to contingencies			167,326
Risk adjustment payable				$ 291,146
Total assets of discontinued operations			647,254
Discontinued Operations | California Medicare Advantage Business | Corporate & Eliminations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total assets of discontinued operations			$ 2,900
Discontinued Operations | California Medicare Advantage Business | Bright HealthCare - Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Risk adjustment payable		$ 279,922		291,146
Total assets of discontinued operations		149,352
Discontinued Operations | Bright HealthCare - Commercial | Level 1
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and short-term investments		111,100		157,800
Discontinued Operations | Bright HealthCare - Commercial | Level 2
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and short-term investments		$ 2,400		$ 22,600