INCOME TAXES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
ITC carryforward	$ 191,600	$ 191,200
Effective term	20 years
Potential net capital loss	$ 56,600
Unrecognized tax benefits	4,993	4,978		$ 0
Operating loss carryforward, valuation allowance	600			$ 17,200
Reversal of a valuation allowance for certain deferred tax assets		15,800
Investment tax credit, solar property, percentage			26.00%		26.00%	26.00%
Capital Loss Carryforward
Income Tax Contingency [Line Items]
Tax credit carryforward, valuation allowance	5,100	5,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 634,700	$ 631,200
State and Local Jurisdiction | Minimum
Income Tax Contingency [Line Items]
Effective term	7 years
State and Local Jurisdiction | Maximum
Income Tax Contingency [Line Items]
Effective term	20 years