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Accumulated Other Comprehensive Loss (Schedule of Reclassifications From Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax (expense) benefit | $ (793) | $ (677) |
Net income | 1,980 | 1,871 | $ 7,281
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net income | (248) | (142) |
Investment securities- with OTTI [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Interest income (expense) on investment securities: taxable | 2 | 36 |
Tax (expense) benefit | 0 | (14) |
Net income | 2 | 22 |
Investment Securities -All Other AFS [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net gains/(losses) - other | (9) | 206 |
Tax (expense) benefit | 4 | (82) |
Net income | (5) | 124 |
Investment Securities HTM [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Interest income (expense) on investment securities: taxable | (101) | (237) |
Tax (expense) benefit | 40 | 94 |
Net income | (61) | (143) |
Pension Plan [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax (expense) benefit | 105 | 85 |
Net income | (162) | (130) |
Pension Plan [Member] | Amortization of unrecognized loss [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Salaries and employee benefits | 264 | 212 |
Pension Plan [Member] | Amortization of transition asset [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Salaries and employee benefits | 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) |
SERP [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax (expense) benefit | 14 | 9 |
Net income | (22) | (15) |
SERP [Member] | Amortization of unrecognized loss [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Salaries and employee benefits | (37) | (19) |
SERP [Member] | Amortization of prior service costs [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Salaries and employee benefits | $ 1 | $ (5) |

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