Fair Value Measurements and Disclosures (Schedule of Quantitative Information about Level Three Fair Value Measurements - Nonrecurring Basis) (Details)	9 Months Ended
	Sep. 30, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Mortgage Servicing Rights [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs, Loan Servicing Costs, Loans in Foreclosure	$ 1,000
Mortgage Servicing Rights [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Input, Discount Rate	9.16%
Unobservable Input, Prepayment Speed	13.22%
Unobservable Input, Loan Servicing Costs, Performing Loans	$ 71
Unobservable Input, Loan Servicing Costs, Delinquent Loans	$ 200
Mortgage Servicing Rights [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Input, Discount Rate	9.30%
Unobservable Input, Prepayment Speed	14.80%
Unobservable Input, Loan Servicing Costs, Performing Loans	$ 72
Unobservable Input, Loan Servicing Costs, Delinquent Loans	$ 750
Mortgage Servicing Rights [Member] | Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Input, Discount Rate	9.28%	[1]
Unobservable Input, Prepayment Speed	14.58%	[1]
Unobservable Input, Loan Servicing Costs, Performing Loans	$ 72	[1]

[1] *Ranges and weighted averages based on interest rate tranches