Nature of Banking Activities and Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) Loan shares	Dec. 31, 2021 USD ($) Loan shares	Jan. 01, 2023 USD ($)	Jul. 11, 2022 shares
Property Plant And Equipment [Line Items]
Ownership percentage in subsidiaries	100.00%
Sale of Non Mortgage Loans | $	$ 156,000,000
Period interest on mortgage loans is discontinued	120 days
Period Interest on commercial loans discontinued	90 days
Credit card loans and other personal loans are charged off	180 days
Limit of the estimated appraised value of the furnished home	80.00%
Authorized issuance of shares of common stock | shares	500,000
"More likely than not" threshold	50.00%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares	0	0
Number of shares of common stock able to be repurchased | shares				150,000
Treasury Stock, Shares, Retired | shares	4,442	4,749
Stock Repurchased and Retired During Period, Value | $	$ 34.79	$ 31.26
Maximum numbers of shares that may yet be purchased under plan | shares	148,969
Minimum [Member]
Property Plant And Equipment [Line Items]
Adjustment to retained earnings, net of deferred income taxes, and adjustments to the allowance for credit losses on loans | $			$ 1,500,000
Maximum [Member]
Property Plant And Equipment [Line Items]
Adjustment to retained earnings, net of deferred income taxes, and adjustments to the allowance for credit losses on loans | $			$ 2,500,000
Building [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	10 years
Building [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	39 years
Furniture and equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	3 years
Furniture and equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	10 years
Paycheck Protection Program Loans [Member]
Property Plant And Equipment [Line Items]
Number of loans | Loan	1	152
Total outstanding balance of loans | $	$ 74,000	$ 15,900,000