Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Other Commitments [Line Items]
Commitments and letters of credit	$ 2,447,111	$ 2,628,043
Commitments to extend credit
Other Commitments [Line Items]
Commitments and letters of credit	2,380,155	2,566,154
Standby letters of credit
Other Commitments [Line Items]
Commitments and letters of credit	$ 66,956	$ 61,889