Investment Securities - Narrative (Details)	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 52,228,000	$ 52,715,000
Trade date receivables settled after period end	365,000	0
Trade date payables settled after period end	0	0
Allowance for credit losses on investments	$ 0	$ 0
Number of securities in securities portfolio | security	266	439
Number of securities in securities portfolio, unrealized loss position | security	207	370
Equity securities without readily determinable market value	$ 23,301,000	$ 25,191,000
Equity method investments	20,000,000
Federal home loan bank stock	32,859,000	34,190,000
Collateral Pledged
Debt and Equity Securities, FV-NI [Line Items]
Securities pledged	1,057,384,000	929,546,000
Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 5,848,000	$ 7,212,000