Summary of Significant Accounting Policies - Narrative (Details)		12 Months Ended
	Jan. 01, 2020 USD ($)	Dec. 31, 2021 USD ($) renewal_option Segment qtr	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
Accrued interest receivable on available-for-sale debt securities		2,200,000	$ 2,200,000
Accrued interest receivable		$ 13,300,000	$ 15,400,000
Period of delinquent loan		90 days
Number of quarters used in the mean loss calculation | qtr		8
DCF methodology, percentage (in percent)		88.40%	90.80%
WARM methodology, percentage (in percent)		11.60%	9.20%
Number of options to renew | renewal_option		1
Percentage of total loans (in percent)		1.000	1.000
Decrease to retained earnings		$ (260,582,000)	$ (218,727,000)
Allowance for credit losses on loans	$ 670,000
ASU No. 2016-13
Summary Of Significant Accounting Policies [Line Items]
Allowance for loan losses, period increase (decrease)	$ 5,000,000
Percentage of total loans (in percent)	0.255
Decrease to retained earnings	$ 3,400,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Reduced interest rate modification period		6 months
Maximum
Summary Of Significant Accounting Policies [Line Items]
Period of consumer loans charged off		180 days
Reduced interest rate modification period		12 months
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