Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) ShareBasedCompensationPlan employee	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Held-to-maturity securities	$ 0	$ 0
Trading securities	0	0
Unrecognized tax benefits	0	0	$ 0
Unrecognized tax benefits, accrued interest and penalties	$ 0	$ 0	$ 0
Number of share based compensation plans | ShareBasedCompensationPlan	2
Number of individuals with split dollar life insurance arrangement | employee	4
Minimum [Member] | Residential Mortgages [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Amortization term length	10 years
Maximum [Member] | Residential Mortgages [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Residential mortgage term	30 years
Amortization term length	30 years