ACQUISITION OF SUBSIDIARIES - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 25, 2025	Mar. 31, 2026	Mar. 31, 2025	Feb. 26, 2025
Business Combination [Line Items]
Income tax benefit		$ (3,523)	$ 41,514
Reclassification out of Accumulated Other Comprehensive Income | AOCI, Equity Method Investment, Including Noncontrolling Interest [Member]
Business Combination [Line Items]
Income tax benefit	$ 9,200
Long Ridge Energy & Power LLC
Business Combination [Line Items]
Percent interest acquired				49.90%
Business combination, step acquisition, gain	$ 120,000
Long Ridge Energy & Power LLC
Business Combination [Line Items]
Ownership Percentage	50.10%
Long Ridge Energy & Power LLC | GCM Grosvenor Inc
Business Combination [Line Items]
Ownership Percentage				49.90%