INCOME TAXES - Operating Loss and Tax Credit Carryforwards (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Carryforwards
Taxable loss	$ 97.6
Federal
Carryforwards
Net operating loss carryforwards	809.2
Net operating loss carryforwards, subject to expiration	444.5
Net operating loss carryforwards, not subject to expiration	364.7
State
Carryforwards
Net operating loss carryforwards	585.5
Net operating loss carryforwards, subject to expiration	552.4
Net operating loss carryforwards, not subject to expiration	$ 33.1