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Securities (Tables) | 9 Months Ended
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Sep. 30, 2014
Investments debt and equity securities [Abstract] |
Available-for-sale Securities [Table Text Block] |
|  |  | 1 year | 1 to 5 | 5 to 10 | After 10 | Fair |  | Gross Unrealized |  | Amortized
(Dollars in thousands) |  | or less | years | years | years | Value |  | Gains | Losses |  | Cost
September 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | — | 25,753 | 19,682 | 14,068 | 59,503 |  | 146 | 1,373 |  | $ | 60,730
Agency RMBS (a) |  | — | — | 6,958 | 132,226 | 139,184 |  | 1,064 | 1,545 |  |  | 139,665
State and political subdivisions |  | — | 507 | 16,197 | 49,436 | 66,140 |  | 3,217 | 5 |  |  | 62,928
| Total available-for-sale | $ | — | 26,260 | 42,837 | 195,730 | 264,827 |  | 4,427 | 2,923 |  | $ | 263,323
December 31, 2013 |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | — | — | 23,247 | 21,275 | 44,522 |  | — | 4,557 |  | $ | 49,079
Agency RMBS (a) |  | — | — | 8,306 | 154,052 | 162,358 |  | 976 | 4,733 |  |  | 166,115
State and political subdivisions |  | — | 1,735 | 21,366 | 41,238 | 64,339 |  | 1,560 | 459 |  |  | 63,238
| Total available-for-sale | $ | — | 1,735 | 52,919 | 216,565 | 271,219 |  | 2,536 | 9,749 |  | $ | 278,432
(a) Includes securities issued by U.S. government agencies or government sponsored entities.
Available-for-sale Securities, Continuous Unrealized Loss Position [Table Text Block] |
|  |  |  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total
|  |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized
(Dollars in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses
September 30, 2014: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | 17,494 |  |  | 28 |  |  | 23,609 |  |  | 1,345 |  | $ | 41,103 |  |  | 1,373
Agency RMBS |  | 25,730 |  |  | 62 |  |  | 52,358 |  |  | 1,483 |  |  | 78,088 |  |  | 1,545
State and political subdivisions |  | 670 |  |  | 4 |  |  | 769 |  |  | 1 |  |  | 1,439 |  |  | 5
|  | Total | $ | 43,894 |  |  | 94 |  |  | 76,736 |  |  | 2,829 |  | $ | 120,630 |  |  | 2,923
December 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | 35,933 |  |  | 3,182 |  |  | 8,590 |  |  | 1,376 |  | $ | 44,523 |  |  | 4,558
Agency RMBS |  | 109,774 |  |  | 4,393 |  |  | 7,683 |  |  | 339 |  |  | 117,457 |  |  | 4,732
State and political subdivisions |  | 9,575 |  |  | 459 |  |  | — |  |  | — |  |  | 9,575 |  |  | 459
|  | Total | $ | 155,282 |  |  | 8,034 |  |  | 16,273 |  |  | 1,715 |  | $ | 171,555 |  |  | 9,749
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] |
|  |  |  | Quarter ended September 30, |  |  | Nine months ended September 30,
(Dollars in thousands) |  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013
Balance, beginning of period | $ | — |  | $ | 757 |  | $ | — |  | $ | 1,257
| Reductions: |  |  |  |  |  |  |  |  |  |  |
|  | Securities fully written down and deemed worthless |  | — |  |  | — |  |  | — |  |  | 500
Balance, end of period | $ | — |  | $ | 757 |  | $ | — |  | $ | 757
Available For Sale Securiites Changes In Other Than Temporary Impairment Losses [Table Text Block] |
|  |  |  |  | Quarter ended September 30, |  |  | Nine months ended September 30,
(Dollars in thousands) |  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013
Other-than-temporary impairment charges |  |  |  |  |  |  |  |  |  |  |
| Debt securities: |  |  |  |  |  |  |  |  |  |  |
|  | Agency RMBS | $ | — |  | $ | — |  | $ | 333 |  | $ | —
|  |  | Total debt securities |  | — |  |  | — |  |  | 333 |  |  | —
Total other-than-temporary impairment charges | $ | — |  | $ | — |  | $ | 333 |  | $ | —
Other-than-temporary impairment on debt securities: |  |  |  |  |  |  |  |  |  |
| Recorded as part of gross realized losses: |  |  |  |  |  |  |  |  |  |  |
|  | Securities with intent to sell |  | — |  |  | — |  |  | 333 |  |  | —
Total other-than-temporary impairment on debt securities | $ | — |  | $ | — |  | $ | 333 |  | $ | —
Schedule of Realized Gain (Loss) [Table Text Block] |
Realized Gains and Losses
|  | The following table presents the gross realized gains and losses on sales and other-than-temporary impairment charges
related to securities.
|  |  |  |  | Quarter ended September 30, |  |  | Nine months ended September 30,
(Dollars in thousands) |  |  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013
Gross realized gains |  | $ | 429 |  | $ | — |  | $ | 467 |  | $ | 685
Gross realized losses |  |  | (664) |  |  | — |  |  | (664) |  |  | (6)
Other-than-temporary impairment charges |  |  | — |  |  | — |  |  | (333) |  |  | —
| Realized (losses) gains, net |  | $ | (235) |  | $ | — |  | $ | (530) |  | $ | 679

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