Loans and Allowance for Credit Losses - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) segment portfolio	Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan participations	$ 2,800,000,000
Loan participations sold	1,200,000,000
Loan participations retained	$ 1,600,000,000
Number of loan portfolios | portfolio	4
Number of loan segments | segment	7
Accrued interest receivable on loans	$ 169,800,000	$ 137,700,000
Loan placed on nonaccrual when past due, number of days	90 days
Unfunded commitments on TDRs	$ 0	$ 0
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Percentage of risk-based capital	244.00%
Regulatory guideline limit	300.00%
Maximum
Financing Receivable, Allowance for Credit Losses [Line Items]
Aggregate amount of loans to related parties	5.00%	5.00%