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Investment Securities (Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position) (Details) $ in Thousands | Sep. 30, 2017 USD ($) security | Dec. 31, 2016 USD ($) security
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Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 30 | 149
Available-for-sale securities, Less than 12 Months: Fair Value | $ 40,924 | $ 118,601
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 419 | $ 4,453
Available-for-sale securities, 12 Months or More: Number of Securities | security | 59 | 2
Available-for-sale securities, 12 Months or More: Fair Value | $ 50,119 | $ 1,056
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 1,285 | $ 112
Available-for-sale securities, Total: Number of Securities | security | 89 | 151
Available-for-sale securities, Total: Fair Value | $ 91,043 | $ 119,657
Available-for-sale securities, Total: Unrealized Losses | $ 1,704 | $ 4,565
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 33 |
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 31,220 |
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 150 |
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 0 |
Held-to-maturity securities, Total: Number of Securities | security | 33 |
Held-to-maturity securities, Total: Fair Value | $ 31,220 |
Held-to-maturity securities, Total: Unrealized Losses | $ 150 |
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 63 |
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value | $ 72,144 |
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 569 |
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security | 59 |
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Fair Value | $ 50,119 |
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 1,285 |
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security | 122 |
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value | $ 122,263 |
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses | $ 1,854 |
U.S. Treasury and U.S. government agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 7 | 23
Available-for-sale securities, Less than 12 Months: Fair Value | $ 15,790 | $ 43,698
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 237 | $ 1,542
Available-for-sale securities, 12 Months or More: Number of Securities | security | 14 | 0
Available-for-sale securities, 12 Months or More: Fair Value | $ 23,462 |
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 643 |
Available-for-sale securities, Total: Number of Securities | security | 21 | 23
Available-for-sale securities, Total: Fair Value | $ 39,252 | $ 43,698
Available-for-sale securities, Total: Unrealized Losses | $ 880 | $ 1,542
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 2 |
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 4,989 |
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 7 |
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 0 |
Held-to-maturity securities, Total: Number of Securities | security | 2 |
Held-to-maturity securities, Total: Fair Value | $ 4,989 |
Held-to-maturity securities, Total: Unrealized Losses | $ 7 |
Mortgage-backed U.S. Government Agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 11 | 18
Available-for-sale securities, Less than 12 Months: Fair Value | $ 18,279 | $ 24,321
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 141 | $ 579
Available-for-sale securities, 12 Months or More: Number of Securities | security | 9 | 0
Available-for-sale securities, 12 Months or More: Fair Value | $ 9,718 |
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 194 |
Available-for-sale securities, Total: Number of Securities | security | 20 | 18
Available-for-sale securities, Total: Fair Value | $ 27,997 | $ 24,321
Available-for-sale securities, Total: Unrealized Losses | $ 335 | $ 579
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 11 |
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 18,676 |
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 102 |
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 0 |
Held-to-maturity securities, Total: Number of Securities | security | 11 |
Held-to-maturity securities, Total: Fair Value | $ 18,676 |
Held-to-maturity securities, Total: Unrealized Losses | $ 102 |
State and political subdivision obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 12 | 108
Available-for-sale securities, Less than 12 Months: Fair Value | $ 6,855 | $ 50,582
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 41 | $ 2,332
Available-for-sale securities, 12 Months or More: Number of Securities | security | 35 | 0
Available-for-sale securities, 12 Months or More: Fair Value | $ 16,428 |
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 409 |
Available-for-sale securities, Total: Number of Securities | security | 47 | 108
Available-for-sale securities, Total: Fair Value | $ 23,283 | $ 50,582
Available-for-sale securities, Total: Unrealized Losses | $ 450 | $ 2,332
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 20 |
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 7,555 |
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 41 |
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 0 |
Held-to-maturity securities, Total: Number of Securities | security | 20 |
Held-to-maturity securities, Total: Fair Value | $ 7,555 |
Held-to-maturity securities, Total: Unrealized Losses | $ 41 |
Equity Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 0 | 0
Available-for-sale securities, 12 Months or More: Number of Securities | security | 1 | 2
Available-for-sale securities, 12 Months or More: Fair Value | $ 511 | $ 1,056
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 39 | $ 112
Available-for-sale securities, Total: Number of Securities | security | 1 | 2
Available-for-sale securities, Total: Fair Value | $ 511 | $ 1,056
Available-for-sale securities, Total: Unrealized Losses | $ 39 | $ 112

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