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Regulatory Capital Requirements (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2015
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Retained earnings from prior two years available for dividends | $ 21,391,000 |  |
Capital conservation buffer phase in, minimum (as a percentage) | 2.25% |  | 0.00%
Capital conservation buffer phase in, maximum (as a percentage) |  |  | 2.50%
Capital conservation buffer (as a percentage) | 7.11% |  |
Tier 1 capital to risk-weighted assets [Abstract] |  |  |
Actual | $ 165,117,000 | $ 153,114,000 |
Actual | 165,117,000 | 153,114,000 |
For capital adequacy purposes |  | $ 48,415,000 |
Risk-weighted assets [Abstract] |  |  |
Actual (in hundredths) |  | 14.23% |
For capital adequacy purposes (in hundredths) |  | 4.50% |
Non Consolidated |  |  |
Tier 2 capital to risk-weighted asets [Abstract] |  |  |
Actual | 175,448,000 | $ 162,355,000 |
For capital adequacy purposes | 92,892,000 | 86,063,000 |
To be well-capitalized under prompt corrective action provisions | 116,115,000 | 107,579,000 |
Tier 1 capital to risk-weighted assets [Abstract] |  |  |
Actual | 164,116,000 | 151,526,000 |
For capital adequacy purposes | 69,669,000 | 64,548,000 |
To be well-capitalized under prompt corrective action provisions | 92,892,000 | 86,063,000 |
Actual | 164,116,000 | 151,526,000 |
For capital adequacy purposes | 52,252,000 | 48,411,000 |
To be well-capitalized under prompt corrective action provisions | $ 75,474,000 | $ 69,926,000 |
Risk-weighted assets [Abstract] |  |  |
Actual (in hundredths) | 15.11% | 15.09% |
For capital adequacy purposes (in hundredths) | 8.00% | 8.00% |
To be well-capitalized under prompt corrective action provisions (in hundredths) | 10.00% | 10.00% |
Actual (in hundredths) | 14.13% | 14.09% |
For capital adequacy purposes (in hundredths) | 6.00% | 6.00% |
To be well-capitalized under prompt corrective action provisions (in hundredths) | 8.00% | 8.00% |
Actual (in hundredths) | 14.13% | 14.09% |
For capital adequacy purposes (in hundredths) | 4.50% | 4.50% |
To be well-capitalized under prompt corrective action provisions (in hundredths) | 6.50% | 6.50% |
Tier 1 capital to average assets [Abstract] |  |  |
Actual | $ 164,116,000 | $ 151,526,000 |
For capital adequacy purpose | 77,269,000 | 71,386,000 |
To be well-capitalized under prompt corrective action provisions | $ 96,586,000 | $ 89,233,000 |
Average assets [Abstract] |  |  |
Actual (in hundredths) | 8.51% | 8.49% |
For capital adequacy purpose (in hundredths) | 4.00% | 4.00% |
To be well-capitalized under prompt corrective action provisions (in hundredths) | 5.00% | 5.00% |
Consolidated |  |  |
Tier 2 capital to risk-weighted asets [Abstract] |  |  |
Actual | $ 176,349,000 | $ 163,943,000 |
For capital adequacy purposes | 92,892,000 | 86,070,000 |
Tier 1 capital to risk-weighted assets [Abstract] |  |  |
For capital adequacy purposes | 69,669,000 | $ 64,553,000 |
For capital adequacy purposes | $ 52,252,000 |  |
Risk-weighted assets [Abstract] |  |  |
Actual (in hundredths) | 15.19% | 15.24% |
For capital adequacy purposes (in hundredths) | 8.00% | 8.00% |
Actual (in hundredths) | 14.22% | 14.23% |
For capital adequacy purposes (in hundredths) | 6.00% | 6.00% |
Actual (in hundredths) | 14.22% |  |
For capital adequacy purposes (in hundredths) | 4.50% |  |
Tier 1 capital to average assets [Abstract] |  |  |
Actual | $ 165,117,000 | $ 153,114,000 |
For capital adequacy purpose | $ 76,810,000 | $ 71,435,000 |
Average assets [Abstract] |  |  |
Actual (in hundredths) | 8.60% | 8.57% |
For capital adequacy purpose (in hundredths) | 4.00% | 4.00% |

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