Discontinued operations - Schedule of ASB Sale Transaction (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss)		$ (1,424,119)	$ 201,128	$ 243,028
Discontinued operations		(103,486)	53,362	79,989
American Savings Bank (ASB) | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale proceeds received	$ 400,950
Sale proceeds not yet received	4,500
Investment retained in ASB	44,550
Transaction costs	(21,735)
Net assets derecognized	(546,458)
Loss from the sale of ASB	(118,193)
Income taxes	68,820
Income taxes - valuation allowance	(66,430)
Net deferred income tax asset (liability)	2,390	2,390	0	0
Net loss on the sale transaction	(115,803)
Net income (loss)	12,317	12,317	53,362	79,989
Discontinued operations	$ (103,486)	$ (103,486)	$ 53,362	$ 79,989