ACQUISITION OF SUBSIDIARIES - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Feb. 26, 2025
Business Combination [Line Items]
Goodwill	$ 365,703	$ 365,703
Power and Gas
Business Combination [Line Items]
Cash and cash equivalents			$ 17,205
Restricted cash			218,422
Accounts receivable			12,364
Property, plant and equipment			1,516,873
Intangible assets			1,000
Other assets			11,855
Total assets acquired			1,777,719
Accounts payable and accrued liabilities			54,699
Debt			1,115,200
Pension and other postretirement benefits			197,795
Other liabilities			15,628
Total liabilities assumed			1,383,322
Goodwill			90,337
Total purchase consideration			$ 484,734