Borrowings - Narrative (Details)	1 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($)	Dec. 31, 2023 USD ($) line_of_credit	Dec. 31, 2022 USD ($) line_of_credit	Dec. 31, 2007 USD ($) security
Debt Instrument [Line Items]
Federal home loan balance		$ 250,000,000
Loans pledged		1,800,000,000	$ 1,600,000,000
Remaining borrowing capacity		993,800,000	757,800,000
Advances from federal home loan banks		0	132,396,000
Naming applicable municipalities as beneficiaries		155,700,000	75,500,000
Unamortized debt issuance costs		$ 700,000	$ 1,000,000
Unsecured Debt
Debt Instrument [Line Items]
Number of unsecured lines of credit issued | line_of_credit		1	1
Pledge on certain loan amount		$ 10,000,000	$ 10,000,000
Line of credit, outstanding amount		$ 0	$ 0
Subordinated Debt
Debt Instrument [Line Items]
Number of preferred trust securities | security				2
Floating rate trust preferred securities				$ 10,000,000
Effective percentage		7.20%	6.32%
Trust preferred securities, interest payment deferment period		5 years
Subordinated Debt | LIBOR
Debt Instrument [Line Items]
Line of credit, basis spread on variable rate		1.55%
Subordinated Debt | SOFR
Debt Instrument [Line Items]
Line of credit, basis spread on variable rate		1.55%
Credit spread adjustment (percent)		0.26161%
Overnight Borrowing Agreements | Subordinated Debt
Debt Instrument [Line Items]
Proceeds from issuance of subordinated long-term debt	$ 83,500,000
Overnight Borrowing Agreements | Subordinated Debt | SOFR
Debt Instrument [Line Items]
Line of credit, basis spread on variable rate	2.58%
Notes Maturing In June 2031 | Subordinated Debt
Debt Instrument [Line Items]
Floating rate trust preferred securities	$ 85,000,000
Interest rate, percentage	3.25%
Federal Reserve Borrower In Custody Program | Federal Reserve Bank Advances
Debt Instrument [Line Items]
Federal home loan balance		$ 255,500,000
Federal Reserve Borrower In Custody Program | Federal Reserve Bank Advances | Qualifying loans pledged as collateral
Debt Instrument [Line Items]
Loans pledged		282,700,000
Federal Reserve Borrower In Custody Program | Federal Reserve Bank Advances | Securities pledged as collateral
Debt Instrument [Line Items]
Loans pledged		$ 78,500,000
Line of Credit | Unsecured Debt | SOFR
Debt Instrument [Line Items]
Line of credit, basis spread on variable rate		2.85%
Line of Credit | Overnight Borrowing Agreements
Debt Instrument [Line Items]
Line of credit, outstanding amount		$ 0	$ 0