Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest related to financial assets held at amortized cost	$ 342,400	$ 351,500	$ 342,400	$ 351,500	$ 332,800
Financial Asset, Amortized Cost, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable and other	Accrued interest receivable and other	Accrued interest receivable and other	Accrued interest receivable and other	Accrued interest receivable and other
Nonaccrual loans with no related allowance for credit losses	$ 66,400		$ 66,400
Provision for credit losses	21,800	$ 6,799	68,000	$ 68,389
Loan net charge-offs	24,600		50,500
Provision for credit losses	(2)		(61)
Foreclosed residential real estate properties	0		0
Commitments to lend	23,900	8,600	23,900	8,600
Financing Receivable | Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded investment, foreclosure proceedings in process	$ 67,000	$ 40,400	$ 67,000	$ 40,400