Securities - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) security $ / shares shares	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Private mortgage-backed security fair value	$ 700,000	$ 800,000
Number of securities | security	657	666
Number of securities in an unrealized loss position | security	632	644
Investment securities, pledged as collateral for public deposits	$ 820,900,000
Proceeds from sales of securities available for sale	111,863,000	$ 0	$ 106,484,000
Losses on sales of securities available for sale, net	0	0	$ (1,237,000)
FHLB stock and FRB stock, cost	54,500,000	39,600,000
FHLB, cost	21,700,000	14,700,000
FRB stock	32,800,000	24,900,000
Collateral For Public Deposits
Debt and Equity Securities, FV-NI [Line Items]
Investment securities, pledged as collateral for public deposits	971,300,000	758,000,000
Collateral For FRB Borrowings
Debt and Equity Securities, FV-NI [Line Items]
Investment securities, pledged as collateral for public deposits	$ 679,000,000	$ 0
Visa, Inc | Common Class B
Debt and Equity Securities, FV-NI [Line Items]
Stock owned (in shares) | shares	12,356
Carrying value of shares	$ 0
Visa, Inc | Common Class A
Debt and Equity Securities, FV-NI [Line Items]
Conversion price (in usd per share) | $ / shares	$ 1.59
Conversion of stock (in shares) | shares	19,615