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Loans, Collateral Dependent Loans and Loans With/Without Specific Valuation Allowance (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 USD ($) Loan | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($)
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance |  | $ 1,631,000 | $ 1,212,000
Total loans [Abstract] |  |  |
Recorded balance |  | 50,355,000 | 57,771,000
Unpaid Contractual Principal Balance |  | 54,879,000 | 61,786,000
Specific Allowance |  | 1,631,000 | 1,212,000
Average Investment in Impaired Loans |  | 51,120,000 | 55,700,000
Interest Income Recognized |  | 581,000 | 2,371,000
Commercial [Member] | Collateral Pledged [Member] |  |  |
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance | $ 2,019,000 |  |
Total loans [Abstract] |  |  |
Number of Loans | Loan | 31 |  |
Recorded balance | $ 54,702,000 |  |
Specific Allowance | 2,019,000 |  |
Commercial [Member] | Hotel/Motel [Member] | Collateral Pledged [Member] |  |  |
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance | $ 250,000 |  |
Total loans [Abstract] |  |  |
Number of Loans | Loan | 3 |  |
Recorded balance | $ 14,712,000 |  |
Specific Allowance | 250,000 |  |
Commercial [Member] | Commercial Real Estate Residential [Member] | Collateral Pledged [Member] |  |  |
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance | $ 92,000 |  |
Total loans [Abstract] |  |  |
Number of Loans | Loan | 7 |  |
Recorded balance | $ 5,125,000 |  |
Specific Allowance | 92,000 |  |
Commercial [Member] | Commercial Real Estate Nonresidential [Member] | Collateral Pledged [Member] |  |  |
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance | $ 720,000 |  |
Total loans [Abstract] |  |  |
Number of Loans | Loan | 16 |  |
Recorded balance | $ 25,296,000 |  |
Specific Allowance | 720,000 |  |
Commercial [Member] | Commercial Other [Member] |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 8,903,000 | 7,829,000
Unpaid Contractual Principal Balance |  | 10,598,000 | 9,489,000
Average Investment in Impaired Loans |  | 8,866,000 | 9,889,000
Interest Income Recognized |  | 139,000 | 460,000
Loans with a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 1,154,000 | 3,244,000
Unpaid Contractual Principal Balance |  | 1,154,000 | 3,244,000
Specific Allowance |  | 620,000 | 886,000
Average Investment in Impaired Loans |  | 1,169,000 | 1,323,000
Interest Income Recognized |  | 17,000 | 29,000
Total loans [Abstract] |  |  |
Recorded balance |  | 10,057,000 | 11,073,000
Unpaid Contractual Principal Balance |  | 11,752,000 | 12,733,000
Specific Allowance |  | 620,000 | 886,000
Average Investment in Impaired Loans |  | 10,035,000 | 11,212,000
Interest Income Recognized |  | 156,000 | 489,000
Commercial [Member] | Commercial Other [Member] | Collateral Pledged [Member] |  |  |
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance | $ 957,000 |  |
Total loans [Abstract] |  |  |
Number of Loans | Loan | 5 |  |
Recorded balance | $ 9,569,000 |  |
Specific Allowance | 957,000 |  |
Commercial [Member] | Commercial Other [Member] | Collateral Pledged by Leasehold Mortgage [Member] |  |  |
Total loans [Abstract] |  |  |
Recorded balance | 5,100,000 |  |
Commercial [Member] | Commercial Other [Member] | Collateral Pledged by Underground Coal Mining Equipment and Junior Real Estate Liens [Member] |  |  |
Total loans [Abstract] |  |  |
Recorded balance | 4,100,000 |  |
Commercial [Member] | Commercial Other [Member] | Collateralized by Commercial Real Estate and Liens on Furniture, Fixtures, and Equipment [Member] |  |  |
Total loans [Abstract] |  |  |
Recorded balance | $ 400,000 |  |
Commercial [Member] | Construction [Member] |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 3,308,000 | 2,836,000
Unpaid Contractual Principal Balance |  | 3,308,000 | 2,837,000
Average Investment in Impaired Loans |  | 3,655,000 | 3,234,000
Interest Income Recognized |  | 46,000 | 170,000
Loans with a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 324,000 | 174,000
Unpaid Contractual Principal Balance |  | 324,000 | 174,000
Specific Allowance |  | 164,000 | 99,000
Average Investment in Impaired Loans |  | 324,000 | 215,000
Interest Income Recognized |  | 3,000 | 11,000
Total loans [Abstract] |  |  |
Recorded balance |  | 3,632,000 | 3,010,000
Unpaid Contractual Principal Balance |  | 3,632,000 | 3,011,000
Specific Allowance |  | 164,000 | 99,000
Average Investment in Impaired Loans |  | 3,979,000 | 3,449,000
Interest Income Recognized |  | 49,000 | 181,000
Commercial [Member] | Real Estate [Member] |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 32,407,000 | 40,346,000
Unpaid Contractual Principal Balance |  | 34,098,000 | 41,557,000
Average Investment in Impaired Loans |  | 32,811,000 | 36,976,000
Interest Income Recognized |  | 347,000 | 1,601,000
Loans with a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 1,922,000 | 1,033,000
Unpaid Contractual Principal Balance |  | 3,060,000 | 2,176,000
Specific Allowance |  | 847,000 | 227,000
Average Investment in Impaired Loans |  | 1,966,000 | 1,678,000
Interest Income Recognized |  | 10,000 | 15,000
Total loans [Abstract] |  |  |
Recorded balance |  | 34,329,000 | 41,379,000
Unpaid Contractual Principal Balance |  | 37,158,000 | 43,733,000
Specific Allowance |  | 847,000 | 227,000
Average Investment in Impaired Loans |  | 34,777,000 | 38,654,000
Interest Income Recognized |  | 357,000 | 1,616,000
Residential [Member] | Construction [Member] |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 0 |
Unpaid Contractual Principal Balance |  | 0 |
Average Investment in Impaired Loans |  | 0 |
Interest Income Recognized |  | 0 |
Residential [Member] | Real Estate [Member] |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |
Recorded Balance |  | 2,337,000 | 2,309,000
Unpaid Contractual Principal Balance |  | 2,337,000 | 2,309,000
Average Investment in Impaired Loans |  | 2,329,000 | 2,385,000
Interest Income Recognized |  | 19,000 | 85,000
Loans with a specific valuation allowance [Abstract] |  |  |
Specific Allowance |  | 0 | 0
Total loans [Abstract] |  |  |
Recorded balance |  | 2,337,000 | 2,309,000
Unpaid Contractual Principal Balance |  | 2,337,000 | 2,309,000
Specific Allowance |  | 0 | 0
Average Investment in Impaired Loans |  | 2,329,000 | 2,385,000
Interest Income Recognized |  | $ 19,000 | $ 85,000

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