Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) segment renewal_option qtr	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reportable operating segment | segment	1
Accrued interest reversed against interest income	$ 0	$ 0
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable and other assets	Accrued interest receivable and other assets
Accrued interest receivable on available-for-sale debt securities	$ 1,400,000	$ 1,500,000
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable and other assets	Accrued interest receivable and other assets
Accrued interest receivable on held-to-maturity debt securities	$ 1,300,000	$ 1,300,000
Accrued interest receivable	$ 21,600,000	$ 17,300,000
Period of delinquent loan	90 days
Number of quarters used in the mean loss calculation | qtr	8
DCF methodology, percentage (in percent)	85.90%	86.00%
WARM methodology, percentage (in percent)	14.10%	14.00%
Credit losses on OBS credit exposures	$ 759,000	$ 603,000	$ 0	$ 0
Number of options to renew | renewal_option	1
Premises and Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	3 years
Premises and Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	39 years
Furniture, Fixtures and Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	3 years
Furniture, Fixtures and Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	10 years
Buildings and Building Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	15 years
Buildings and Building Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	39 years
Core Deposit | FC Banc Corp
Summary Of Significant Accounting Policies [Line Items]
Amortization of intangible assets	4 years
Core Deposit | Lake National Bank
Summary Of Significant Accounting Policies [Line Items]
Amortization of intangible assets	10 years