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Loans, Troubled Debt Restructurings Segregated by Class (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 USD ($) Loan | Sep. 30, 2018 USD ($) Loan | Sep. 30, 2019 USD ($) Loan | Sep. 30, 2018 USD ($) Loan | Dec. 31, 2018 USD ($) Loan
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 5 | 7 | 28 | 36 | 40
Post-Modification Outstanding Balance | $ 302,000 | $ 2,692,000 | $ 7,601,000 | $ 7,157,000 | $ 9,017,000
Commitment to extend additional credit on loans modified in TDRs | $ 80,000 |  | $ 80,000 |  |
Defaulted restructured loans, number of loans | Loan | 2 | 3 | 2 | 5 |
Defaulted restructured loans, recorded balance | $ 64,000 | $ 153,000 | $ 64,000 | $ 195,000 |
Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 302,000 | 2,292,000 | 6,539,000 | 5,759,000 | 6,915,000
Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 0 | 0 | 0 | 0 | 0
Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | $ 0 | $ 400,000 | $ 1,062,000 | $ 1,398,000 | $ 2,102,000
Commercial [Member] | Construction [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan |  |  |  | 4 | 5
Post-Modification Outstanding Balance |  |  |  | $ 458,000 | $ 2,197,000
Defaulted restructured loans, number of loans | Loan | 1 | 2 | 0 | 2 |
Defaulted restructured loans, recorded balance | $ 0 | $ 147,000 | $ 0 | $ 147,000 |
Commercial [Member] | Construction [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  |  |  | 443,000 | 2,182,000
Commercial [Member] | Construction [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  |  |  | 0 | 0
Commercial [Member] | Construction [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  |  |  | $ 15,000 | $ 15,000
Commercial [Member] | Real Estate [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 3 | 6 | 13 | 23 | 24
Post-Modification Outstanding Balance | $ 270,000 | $ 2,428,000 | $ 5,463,000 | $ 5,970,000 | $ 5,387,000
Defaulted restructured loans, number of loans | Loan | 1 | 0 | 1 | 1 |
Defaulted restructured loans, recorded balance | $ 30,000 | $ 0 | $ 30,000 | $ 17,000 |
Commercial [Member] | Real Estate [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 270,000 | 2,028,000 | 4,784,000 | 4,587,000 | 4,004,000
Commercial [Member] | Real Estate [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 0 | 0 | 0 | 0 | 0
Commercial [Member] | Real Estate [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | $ 0 | $ 400,000 | $ 679,000 | $ 1,383,000 | $ 1,383,000
Commercial [Member] | Other [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 2 |  | 13 | 8 | 8
Post-Modification Outstanding Balance | $ 32,000 |  | $ 1,432,000 | $ 465,000 | $ 465,000
Defaulted restructured loans, number of loans | Loan | 1 | 1 | 1 | 2 |
Defaulted restructured loans, recorded balance | $ 34,000 | $ 6,000 | $ 34,000 | $ 31,000 |
Commercial [Member] | Other [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 32,000 |  | 1,292,000 | 465,000 | 465,000
Commercial [Member] | Other [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 0 |  | 0 | 0 | 0
Commercial [Member] | Other [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | $ 0 |  | $ 140,000 | $ 0 | $ 0
Residential [Member] | Real Estate [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan |  | 1 | 2 | 1 | 3
Post-Modification Outstanding Balance |  | $ 264,000 | $ 706,000 | $ 264,000 | $ 968,000
Residential [Member] | Real Estate [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  | 264,000 | 463,000 | 264,000 | 264,000
Residential [Member] | Real Estate [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  | 0 | 0 | 0 | 0
Residential [Member] | Real Estate [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  | $ 0 | $ 243,000 | $ 0 | $ 704,000

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