Fair Values of Assets and Liabilities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value appraisal minimum period	18 months
Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Eligibility criteria of classified loans for appraisal by professional appraiser	$ 250,000