Commitments, Contingencies, and Financial Guarantees - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Term of standby letters of credit, years		1 year
Percent of unfunded loan commitments with fixed rates		4.00%
Loan commitments floating rate, minimum		2.10%
Loan commitments floating rate, maximum		22.49%
Allowance for unfunded loan commitments	$ 31,200,000	$ 31,200,000	$ 32,200,000
Visa
Loss Contingencies [Line Items]
Investment owned, balance, shares (in shares)	65,466	65,466
Realized gain (loss)	$ 21,600,000
Investment owned, at cost	0	$ 0
Interest Rate Swap
Loss Contingencies [Line Items]
Notional	$ 557,800,000	$ 557,800,000	$ 398,900,000