Summary of Significant Accounting Policies (Details) $ in Thousands		12 Months Ended
	Jan. 01, 2020 USD ($)	Dec. 31, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reportable operating segment | Segment		1
Accrued interest receivable on available-for-sale debt securities		$ 2,200
Accrued interest receivable		$ 15,400
Period of delinquent loan		90 days
DCF methodology, percentage		90.80%
WARM methodology, percentage		9.20%
Allowance for loan losses, period increase (decrease)		$ 5,000	$ 0
Percentage of total loans	0.255	1.000	1.000
Decrease to retained earnings		$ 3,400
Allowance for credit losses on loans	$ 670
Maximum
Summary Of Significant Accounting Policies [Line Items]
Period of consumer loans charged off		180 days
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