DISCONTINUED OPERATIONS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	$ 1,285	$ 2,793	$ 1,586	$ 9,657
Discontinued Operations, Held-for-Sale | Brand New Day and Central Health Plan
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration	600,000		600,000
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Risk adjustment payable	1,954,815		1,954,815		$ 1,943,890
Discontinued Operations | Bright HealthCare - Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Risk adjustment payable	1,953,502		1,953,502		1,942,643
Discontinued Operations | Bright HealthCare
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Risk adjustment payable	1,313		1,313		1,247
Discontinued Operations | Fair Value, Inputs, Level 1 | Bright HealthCare - Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and short-term investments	1,500,000		1,500,000		1,300,000
Discontinued Operations | Fair Value, Inputs, Level 2 | Bright HealthCare - Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and short-term investments	$ 53,200		$ 53,200		$ 826,000