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Fair Value Disclosures - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Securities available for sale |  |
Securities available for sale | $ 355,981 | $ 250,603
Equity securities |  |
Equity securities | 4,981 | 5,006
Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 355,981 | 250,603
Loans held for sale |  |
Loans held for sale | 683 |
Mutual Fund |  |
Equity securities |  |
Equity securities | 4,981 | 5,006
Mutual Fund | Fair Value, Measurements, Recurring [Member] |  |
Equity securities |  |
Equity securities | 4,981 | 5,006
US Government Agency Obligations [Member] |  |
Securities available for sale |  |
Securities available for sale | 94,774 | 109,890
US Government Agency Obligations [Member] | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 94,774 | 109,890
U.S. Treasury Notes |  |
Securities available for sale |  |
Securities available for sale | 1,905 | 1,934
U.S. Treasury Notes | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 1,905 | 1,934
Mortgage-backed Securities, Residential |  |
Securities available for sale |  |
Securities available for sale | 30,581 | 33,663
Mortgage-backed Securities, Residential | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 30,581 | 33,663
Asset Backed Securities |  |
Securities available for sale |  |
Securities available for sale | 10,805 | 11,845
Asset Backed Securities | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 10,805 | 11,845
State and Municipal |  |
Securities available for sale |  |
Securities available for sale | 144,062 | 74,391
State and Municipal | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 144,062 | 74,391
Corporate Bonds |  |
Securities available for sale |  |
Securities available for sale | 68,986 | 15,320
Corporate Bonds | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 68,986 | 15,320
SBA Pooled Securities |  |
Securities available for sale |  |
Securities available for sale | 4,868 | 3,560
SBA Pooled Securities | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 4,868 | 3,560
Level 1 | Mutual Fund | Fair Value, Measurements, Recurring [Member] |  |
Equity securities |  |
Equity securities | 4,981 | 5,006
Level 2 | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 355,981 | 250,603
Loans held for sale |  |
Loans held for sale | 683 |
Level 2 | US Government Agency Obligations [Member] | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 94,774 | 109,890
Level 2 | U.S. Treasury Notes | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 1,905 | 1,934
Level 2 | Mortgage-backed Securities, Residential | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 30,581 | 33,663
Level 2 | Asset Backed Securities | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 10,805 | 11,845
Level 2 | State and Municipal | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 144,062 | 74,391
Level 2 | Corporate Bonds | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | 68,986 | 15,320
Level 2 | SBA Pooled Securities | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale |  |
Securities available for sale | $ 4,868 | $ 3,560

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