Fair Value Measurements, Quantitative Information About Unobservable Inputs Used In Recurring And Nonrecurring Level 3 Inputs (Details) - Nonrecurring [Member] $ in Thousands	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 998
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	998
Impaired Loans, Fair Value Calculated Using Estimated Sales Price [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	71	$ 1,753
Other Real Estate Owned [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	35	0
Impaired Loans, Fair Value Calculated Using Disounted Cash Flows [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 892	$ 1,606
Measurement Input, Discount Rate [Member] | Impaired loans [Member] | High [Member] | Level 3 [Member] | Discounted Cash Flows [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	0.0825	0.0825
Measurement Input, Discount Rate [Member] | Impaired loans [Member] | Low [Member] | Level 3 [Member] | Discounted Cash Flows [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	0.0450	0.0325
Measurement Input, Discount Rate [Member] | Impaired loans [Member] | Weighted Average [Member] | Level 3 [Member] | Discounted Cash Flows [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	0.0694	0.0627