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Securities (Tables) | 12 Months Ended
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Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract] |
Available-for-sale Securities [Table Text Block] | The estimated fair value of available-for-sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:
|  | (Dollars in thousands) |
|  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market fund |  | $ | 525 |  |  | $ | - |  |  | $ | - |  |  | $ | 525 |
U.S. government sponsored entities |  |  | 17,496 |  |  |  | 1 |  |  |  | (66 | ) |  |  | 17,431 |
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 118,628 |  |  |  | 1,021 |  |  |  | (476 | ) |  |  | 119,173 |
Municipal securities |  |  | 89,506 |  |  |  | 3,986 |  |  |  | (5 | ) |  |  | 93,487 |
Collateralized debt obligations |  |  | 5,096 |  |  |  | - |  |  |  | (2,362 | ) |  |  | 2,734 |
Total securities available-for-sale |  | $ | 231,251 |  |  | $ | 5,008 |  |  | $ | (2,909 | ) |  | $ | 233,350 |
|  | (Dollars in thousands) |
|  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
December 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |
Money market fund |  | $ | 6,453 |  |  | $ | - |  |  | $ | - |  |  | $ | 6,453 |
U.S. government sponsored entities |  |  | 13,000 |  |  |  | 2 |  |  |  | (133 | ) |  |  | 12,869 |
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 116,088 |  |  |  | 1,870 |  |  |  | (384 | ) |  |  | 117,574 |
Municipal securities |  |  | 76,989 |  |  |  | 3,749 |  |  |  | (13 | ) |  |  | 80,725 |
Collateralized debt obligations |  |  | 5,141 |  |  |  | - |  |  |  | (2,709 | ) |  |  | 2,432 |
Total securities available-for-sale |  | $ | 217,671 |  |  | $ | 5,621 |  |  | $ | (3,239 | ) |  | $ | 220,053 |
Schedule of Contractual Maturities of Available-for-sale Debt Securities [Table Text Block] | The estimated fair value of available-for-sale securities and carrying amount, if different, at December 31, 2015 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately.
|  | (Dollars in thousands) |
|  | Available-for-sale |
|  | Estimated |  |  |  |
|  | Fair |  |  | Tax-Equivalent |
December 31, 2015 |  | Value |  |  | Yield (%) |
Due in one year or less |  | $ | 1,015 |  |  |  | 6.75 |
Due from one to five years |  |  | 20,428 |  |  |  | 2.71 |
Due from five to ten years |  |  | 22,363 |  |  |  | 5.58 |
Due over ten years |  |  | 70,371 |  |  |  | 4.57 |
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 119,173 |  |  |  | 2.61 |
Total |  | $ | 233,350 |  |  |  | 3.51 |
Schedule of Realized Gain (Loss) [Table Text Block] | Sales of available-for-sale securities were as follows:
|  | (Dollars in thousands) |
|  | December 31, |  |  | December 31, |
|  | 2015 |  |  | 2014 |
Proceeds |  | $ | 31,088 |  |  | $ | 36,244 |
Gross gains |  |  | 608 |  |  |  | 848 |
Gross losses |  |  | (2 | ) |  |  | (307 | )
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Accumulated other comprehensive income/(loss) balances, net of tax, related to available-for-sale securities, were as follows:
|  | (Dollars in thousands) |
|  | Unrealized gain/(loss) |
Ending balance, December 31, 2014 |  | $ | 1,556 |
Current period change |  |  | (178 | )
Ending balance, December 31, 2015 |  | $ | 1,378 |
Unrealized Gain (Loss) on Investments [Table Text Block] | Securities with unrealized losses at December 31, 2015 and 2014 not recognized in income are as follows:
|  | (Dollars in thousands) |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored entities |  | $ | 9,429 |  |  | $ | (66 | ) |  | $ | - |  |  | $ | - |  |  | $ | 9,429 |  |  | $ | (66 | )
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 39,386 |  |  |  | (232 | ) |  |  | 8,045 |  |  |  | (244 | ) |  |  | 47,431 |  |  |  | (476 | )
Municipal securities |  |  | 1,512 |  |  |  | (5 | ) |  |  | - |  |  |  | - |  |  |  | 1,512 |  |  |  | (5 | )
Collateralized debt obligations |  |  | - |  |  |  | - |  |  |  | 2,734 |  |  |  | (2,362 | ) |  |  | 2,734 |  |  |  | (2,362 | )
Total temporarily impaired |  | $ | 50,327 |  |  | $ | (303 | ) |  | $ | 10,779 |  |  | $ | (2,606 | ) |  | $ | 61,106 |  |  | $ | (2,909 | )
Number of securities |  |  |  |  |  |  | 37 |  |  |  |  |  |  |  | 11 |  |  |  |  |  |  |  | 48 |
|  | (Dollars in thousands) |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
December 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored entities |  | $ | 1,496 |  |  | $ | (4 | ) |  | $ | 10,371 |  |  | $ | (129 | ) |  | $ | 11,867 |  |  | $ | (133 | )
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 8,169 |  |  |  | (40 | ) |  |  | 14,486 |  |  |  | (344 | ) |  |  | 22,655 |  |  |  | (384 | )
Municipal securities |  |  | 687 |  |  |  | (3 | ) |  |  | 1,459 |  |  |  | (10 | ) |  |  | 2,146 |  |  |  | (13 | )
Collateralized debt obligations |  |  | - |  |  |  | - |  |  |  | 2,432 |  |  |  | (2,709 | ) |  |  | 2,432 |  |  |  | (2,709 | )
Total temporarily impaired |  | $ | 10,352 |  |  | $ | (47 | ) |  | $ | 28,748 |  |  | $ | (3,192 | ) |  | $ | 39,100 |  |  | $ | (3,239 | )
Number of securities |  |  |  |  |  |  | 9 |  |  |  |  |  |  |  | 29 |  |  |  |  |  |  |  | 38 |

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