Disclosures About Fair Value of Assets and Liabilities, Quantitative Information (Details) - Nonrecurring Basis [Member] $ in Thousands	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements [Abstract]
Collateral-dependent impaired loans	$ 506	$ 1,021
Foreclosed assets held for sale	110	100
Level 3 [Member]
Quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements [Abstract]
Collateral-dependent impaired loans	506	1,021
Foreclosed assets held for sale	$ 110	$ 100
Level 3 [Member] | Appraisals from Comparable Properties [Member] | Estimated Cost to Sell [Member] | Minimum [Member]
Quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements [Abstract]
Collateral-dependent impaired loans, measurement input	0.07	0.07
Foreclosed assets held for sale, measurement input	0.07	0.07
Level 3 [Member] | Appraisals from Comparable Properties [Member] | Estimated Cost to Sell [Member] | Maximum [Member]
Quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements [Abstract]
Collateral-dependent impaired loans, measurement input	0.1	0.1
Foreclosed assets held for sale, measurement input	0.1	0.1