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Loans, Troubled Debt Restructurings Segregated by Class (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) Loan | Jun. 30, 2017 USD ($) Loan | Jun. 30, 2018 USD ($) Loan | Jun. 30, 2017 USD ($) Loan | Dec. 31, 2017 USD ($) Loan
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 13 | 14 | 29 | 18 | 43
Post-Modification Outstanding Balance | $ 2,467 | $ 1,900 | $ 4,465 | $ 2,325 | $ 5,547
Commitment to extend additional credit on loans modified in TDRs | $ 100 |  | $ 100 |  |
Defaulted restructured loans, number of loans | Loan | 2 | 0 | 2 | 0 |
Defaulted restructured loans, recorded balance | $ 42 | $ 0 | $ 42 | $ 0 |
Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 2,467 | 1,458 | 3,467 | 1,883 | 5,105
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 | $ 442 | $ 998 | $ 442 | $ 442
Commercial [Member] | Construction [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 2 | 2 | 4 | 2 | 2
Post-Modification Outstanding Balance | $ 411 | $ 114 | $ 458 | $ 114 | $ 114
Commercial [Member] | Construction [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 411 | 0 | 443 | 0 | 0
Commercial [Member] | Construction [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 0 | 0 | 0 | 0 | 0
Commercial [Member] | Construction [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | $ 0 | $ 114 | $ 15 | $ 114 | $ 114
Commercial [Member] | Real Estate [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 8 | 4 | 17 | 5 | 15
Post-Modification Outstanding Balance | $ 1,773 | $ 722 | $ 3,542 | $ 771 | $ 2,391
Defaulted restructured loans, number of loans | Loan | 1 | 0 | 1 | 0 |
Defaulted restructured loans, recorded balance | $ 17 | $ 0 | $ 17 | $ 0 |
Commercial [Member] | Real Estate [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 1,773 | 530 | 2,559 | 579 | 2,199
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 | $ 192 | $ 983 | $ 192 | $ 192
Commercial [Member] | Other [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan | 3 | 7 | 8 | 9 | 22
Post-Modification Outstanding Balance | $ 283 | $ 218 | $ 465 | $ 271 | $ 1,208
Defaulted restructured loans, number of loans | Loan | 1 | 0 | 1 | 0 |
Defaulted restructured loans, recorded balance | $ 25 | $ 0 | $ 25 | $ 0 |
Commercial [Member] | Other [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 283 | 82 | 465 | 135 | 1,072
Commercial [Member] | Other [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | 0 | 0 | 0 | 0 | 0
Commercial [Member] | Other [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance | $ 0 | $ 136 | $ 0 | $ 136 | $ 136
Residential [Member] | Construction [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan |  | 1 |  | 1 | 1
Post-Modification Outstanding Balance |  | $ 846 |  | $ 846 | $ 846
Residential [Member] | Construction [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  | 846 |  | 846 | 846
Residential [Member] | Construction [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  | 0 |  | 0 | 0
Residential [Member] | Construction [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  | $ 0 |  | $ 0 | $ 0
Residential [Member] | Real Estate [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Number of Loans | Loan |  |  |  | 1 | 3
Post-Modification Outstanding Balance |  |  |  | $ 323 | $ 988
Residential [Member] | Real Estate [Member] | Term Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  |  |  | 323 | 988
Residential [Member] | Real Estate [Member] | Rate Modification [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  |  |  | 0 | 0
Residential [Member] | Real Estate [Member] | Combination [Member] |  |  |  |  |
Troubled Debt Restructurings Segregated by Class [Abstract] |  |  |  |  |
Post-Modification Outstanding Balance |  |  |  | $ 0 | $ 0

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