Investment Securities - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 52,715,000	$ 45,684,000
Allowance for credit losses for investments	$ 0	$ 0
Number of securities in securities portfolio | security	439	503
Number of securities in securities portfolio, unrealized loss position | security	370	454
Marketable securities at fair value	$ 0	$ 2,990,000
Equity securities without readily determinable market value	25,191,000	22,496,000
Federal home loan bank stock	34,190,000	58,641,000
Net gain (loss) on change in fair value and sale of equity securities	101,000	(377,000)	$ 198,000
Collateral Pledged
Debt and Equity Securities, FV-NI [Line Items]
Securities pledged	929,546,000	1,191,021,000
Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 7,212,000	$ 5,470,000