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Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2016
Investments Debt And Equity Securities [Abstract] |
Schedule of amortized cost and fair value of debt securities classified as available-for-sale |
(in thousands) |  |  | Total Amortized Cost |  |  | Gross Unrealized |  |  | Fair Value |
| Gains |  |  | Losses |
December 31, 2016 |  |  |  |  |
U.S. government and federal agency obligations |  |  |  | $ | 13,667 |  |  |  |  | $ | 0 |  |  |  |  | $ | (303) |  |  |  |  | $ | 13,364 |  |
Government sponsored enterprises |  |  |  |  | 32,786 |  |  |  |  |  | 2 |  |  |  |  |  | (329) |  |  |  |  |  | 32,459 |  |
Obligations of states and political subdivisions |  |  |  |  | 42,666 |  |  |  |  |  | 123 |  |  |  |  |  | (757) |  |  |  |  |  | 42,032 |  |
Mortgage-backed securities: |  |  |  |  |
Residential - government agencies |  |  |  |  | 127,527 |  |  |  |  |  | 124 |  |  |  |  |  | (1,995) |  |  |  |  |  | 125,656 |  |
Commercial - government agencies |  |  |  |  | 989 |  |  |  |  |  | 12 |  |  |  |  |  | 0 |  |  |  |  |  | 1,001 |  |
Total mortgage-backed securities |  |  |  |  | 128,516 |  |  |  |  |  | 136 |  |  |  |  |  | (1,995) |  |  |  |  |  | 126,657 |  |
Total available-for-sale securities |  |  |  | $ | 217,635 |  |  |  |  | $ | 261 |  |  |  |  | $ | (3,384) |  |  |  |  | $ | 214,512 |  |
December 31, 2015 |  |  |  |  |
Government sponsored enterprises |  |  |  | $ | 73,605 |  |  |  |  | $ | 127 |  |  |  |  | $ | (235) |  |  |  |  | $ | 73,497 |  |
Obligations of states and political subdivisions |  |  |  |  | 32,224 |  |  |  |  |  | 493 |  |  |  |  |  | (11) |  |  |  |  |  | 32,706 |  |
Mortgage-backed securities: |  |  |  |  |
Residential - government agencies |  |  |  |  | 129,193 |  |  |  |  |  | 432 |  |  |  |  |  | (1,768) |  |  |  |  |  | 127,857 |  |
Commercial - government agencies |  |  |  |  | 986 |  |  |  |  |  | 8 |  |  |  |  |  | 0 |  |  |  |  |  | 994 |  |
Total mortgage-backed securities |  |  |  |  | 130,179 |  |  |  |  |  | 440 |  |  |  |  |  | (1,768) |  |  |  |  |  | 128,851 |  |
Total available-for-sale securities |  |  |  | $ | 236,008 |  |  |  |  | $ | 1,060 |  |  |  |  | $ | (2,014) |  |  |  |  | $ | 235,054 |  |
Schedule of amortized cost and fair value of debt securities classified as available-for-sale by contractual maturity |
(in thousands) |  |  | Amortized cost |  |  | Fair value |
Due in one year or less |  |  |  | $ | 4,725 |  |  |  |  | $ | 4,726 |  |
Due after one year through five years |  |  |  |  | 48,405 |  |  |  |  |  | 47,973 |  |
Due after five years through ten years |  |  |  |  | 29,363 |  |  |  |  |  | 28,626 |  |
Due after ten years |  |  |  |  | 6,626 |  |  |  |  |  | 6,530 |  |
Total |  |  |  |  | 89,119 |  |  |  |  |  | 87,855 |  |
Mortgage-backed securities |  |  |  |  | 128,516 |  |  |  |  |  | 126,657 |  |
Total available for sale securities |  |  |  | $ | 217,635 |  |  |  |  | $ | 214,512 |
Schedule of gross unrealized losses on debt securities and fair value of related securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position |
|  |  | Less than 12 months |  |  | 12 months or more |  |  | Total |  |  | Total |
(in thousands) |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
At December 31, 2016 |  |  |  |  |  |  |
U.S. government and federal agency obligations |  |  |  | $ | 13,365 |  |  |  |  | $ | (303) |  |  |  |  | $ | 0 |  |  |  |  | $ | 0 |  |  |  |  | $ | 13,365 |  |  |  |  | $ | (303) |  |
Government sponsored enterprises |  |  |  |  | 29,432 |  |  |  |  |  | (329) |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  | 29,432 |  |  |  |  |  | (329) |  |
Obligations of states and political subdivisions |  |  |  |  | 32,318 |  |  |  |  |  | (757) |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  | 32,318 |  |  |  |  |  | (757) |  |
Mortgage-backed securities: |  |  |  |  |  |  |
Residential - government agencies |  |  |  |  | 109,772 |  |  |  |  |  | (1,848) |  |  |  |  |  | 3,742 |  |  |  |  |  | (147) |  |  |  |  |  | 113,514 |  |  |  |  |  | (1,995) |  |
Total |  |  |  | $ | 184,887 |  |  |  |  | $ | (3,237) |  |  |  |  | $ | 3,742 |  |  |  |  | $ | (147) |  |  |  |  | $ | 188,629 |  |  |  |  | $ | (3,384) |  |
(in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At December 31, 2015 |  |  |  |  |  |  |
Government sponsored enterprises |  |  |  | $ | 43,539 |  |  |  |  | $ | (222) |  |  |  |  | $ | 1,002 |  |  |  |  | $ | (13) |  |  |  |  | $ | 44,541 |  |  |  |  | $ | (235) |  |
Obligations of states and political subdivisions |  |  |  |  | 2,571 |  |  |  |  |  | (6) |  |  |  |  |  | 718 |  |  |  |  |  | (5) |  |  |  |  |  | 3,289 |  |  |  |  |  | (11) |  |
Mortgage-backed securities: |  |  |  |  |  |  |
Residential - government agencies |  |  |  |  | 56,095 |  |  |  |  |  | (620) |  |  |  |  |  | 43,576 |  |  |  |  |  | (1,148) |  |  |  |  |  | 99,671 |  |  |  |  |  | (1,768) |  |
Total |  |  |  | $ | 102,205 |  |  |  |  | $ | (848) |  |  |  |  | $ | 45,296 |  |  |  |  | $ | (1,166) |  |  |  |  | $ | 147,501 |  |  |  |  | $ | (2,014) |  |
Schedule of components of investment securities gains (losses), which are recognized in earnings |
(in thousands) |  |  | 2016 |  |  | 2015 |  |  | 2014 |
Gains realized on sales |  |  |  | $ | 623 |  |  |  |  | $ | 8 |  |  |  |  | $ | 86 |  |
Losses realized on sales |  |  |  |  | (21) |  |  |  |  |  | 0 |  |  |  |  |  | (66) |  |
Other-than-temporary impairment recognized |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |
Investment securities gains |  |  |  | $ | 602 |  |  |  |  | $ | 8 |  |  |  |  | $ | 20 |  |

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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 + Details
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