Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Feb. 02, 2024	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Unused commitments to extend credit			$ 5,472,000	$ 4,907,000	$ 5,472,000
Litigation settlement expense				6,500	100,750	$ 0
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Potential exposure to credit loss in the event of nonperformance			144,100	$ 125,400	144,100
Letters of credit, maturity term - maximum				3 years
Collateral held, fair value			15,400	$ 31,400	$ 15,400
Settlement Agreement [Member]
Loss Contingencies [Line Items]
Litigation settlement expense		$ 6,500	100,000
Legal fees			$ 750
Settlement Agreement [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
One-time cash payment of legal settlement	$ 100,000