INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) company project	Dec. 31, 2021 USD ($) company	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated affiliates, net of impairment	$ 22,900	$ 14,200	$ 14,200
Dividends received from equity method investees	$ 26,200	$ 21,600	21,800
Number of offshore wind projects | project	3
Number of companies that transmit hydro electricity imported from The Hydro-Quebec System in Canada | company	2	2
Payments to acquire investments	$ 742,496	$ 327,385	239,673
Offshore Wind Business - North East Offshore
Schedule of Equity Method Investments [Line Items]
Carrying amount of equity method investments in excess of the underlying equity in net assets	343,100	$ 300,400
Goodwill	$ 168,900
Ownership interest (in percent)	50.00%
Revolution Wind And South Fork Wind
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	50.00%
Hydro-Quebec System
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	14.50%	14.50%
Payments to acquire investments	$ 9,300	$ 9,000
Renewable Energy Fund
Schedule of Equity Method Investments [Line Items]
Other-than-temporary impairment		$ 2,800	$ 2,800