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Accumulated Other Comprehensive Loss (Schedule of Reclassifications From Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Tax (expense) benefit | $ (952) | $ (613) | $ (1,745) | $ (1,290) |
Net income | 2,309 | 1,704 | 4,289 | 3,575 | $ 7,281
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net income | (196) | (372) | (445) | (514) |
Investment securities- with OTTI [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Interest income (expense) on investment securities: taxable | 55 | (31) | 57 | 5 |
Tax (expense) benefit | (22) | 12 | (23) | (2) |
Net income | 33 | (19) | 34 | 3 |
Investment Securities -All Other AFS [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net gains/(losses) - other | (8) | 21 | (17) | 227 |
Tax (expense) benefit | 3 | (9) | 7 | (91) |
Net income | (5) | 12 | (10) | 136 |
Investment Securities HTM [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Interest income (expense) on investment securities: taxable | (71) | (371) | (172) | (608) |
Tax (expense) benefit | 28 | 149 | 68 | 243 |
Net income | (43) | (222) | (104) | (365) |
Pension Plan [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Tax (expense) benefit | 107 | 87 | 212 | 172 |
Net income | (160) | (128) | (322) | (258) |
Pension Plan [Member] | Amortization of unrecognized loss [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Salaries and employee benefits | (264) | (212) | (528) | (424) |
Pension Plan [Member] | Amortization of transition asset [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Salaries and employee benefits | 0 | 0 | 0 | 0 |
Pension Plan [Member] | Amortization of prior service costs [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Salaries and employee benefits | (3) | (3) | (6) | (6) |
SERP [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Tax (expense) benefit | 15 | 10 | 29 | 19 |
Net income | (21) | (15) | (43) | (30) |
SERP [Member] | Amortization of unrecognized loss [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Salaries and employee benefits | (36) | (20) | (73) | (39) |
SERP [Member] | Amortization of prior service costs [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Salaries and employee benefits | $ 0 | $ (5) | $ 1 | $ (10) |

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