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Securities - Narrative (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 USD ($) Security | Dec. 31, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items] |  |
Gross realized gains on available for sale securities | $ |  |
Gross realized losses on available for sale securities | $ |  |
Carrying value of securities pledged as collateral | $ | $ 133,010 | $ 134,763
U.S. Government and agencies |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Number of available-for-sale securities, not in continuous loss position for 12 months or more | 40 |
Available-for-sale, Securities in Unrealized Loss Positions, Unrealized Losses as Percentage of Amortized Cost | 5.00% |
Schedule of Held-to-maturity Securities [Line Items] |  |
Number of held to maturity securities | 9 |
Held-to-maturity, Securities in Unrealized Loss Positions, Unrealized Losses as Percentage of Amortized Cost | 1.00% |
Mortgage-backed securities, residential |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Number of available-for-sale securities, not in continuous loss position for 12 months or more | 3 |
Available-for-sale, Securities in Unrealized Loss Positions, Unrealized Losses as Percentage of Amortized Cost | 3.00% |
Schedule of Held-to-maturity Securities [Line Items] |  |
Number of held to maturity securities | 14 |
Held-to-maturity, Securities in Unrealized Loss Positions, Unrealized Losses as Percentage of Amortized Cost | 4.00% |
State and municipal |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Number of available-for-sale securities, not in continuous loss position for 12 months or more | 12 |
Available-for-sale, Securities in Unrealized Loss Positions, Unrealized Losses as Percentage of Amortized Cost | 7.00% |
CRA Mutual Fund |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale, Securities in Unrealized Loss Positions, Unrealized Losses as Percentage of Amortized Cost | 1.00% |

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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