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Securities (Tables) | 6 Months Ended
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Jun. 30, 2015
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
June 30, 2015 |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | 5,007 | 26,033 | 14,870 | 14,309 | 60,219 |  | 509 | 869 |  | $ | 60,579
Agency RMBS (a) |  | — | 1,994 | 15,340 | 104,779 | 122,113 |  | 1,156 | 995 |  |  | 121,952
State and political subdivisions |  | — | 1,055 | 13,121 | 56,398 | 70,574 |  | 2,525 | 290 |  |  | 68,339
| Total available-for-sale | $ | 5,007 | 29,082 | 43,331 | 175,486 | 252,906 |  | 4,190 | 2,154 |  | $ | 250,870
December 31, 2014 |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | — | 30,947 | 14,869 | 14,433 | 60,249 |  | 375 | 830 |  | $ | 60,704
Agency RMBS (a) |  | — | — | 14,523 | 120,520 | 135,043 |  | 1,597 | 616 |  |  | 134,062
State and political subdivisions |  | — | 502 | 15,520 | 56,289 | 72,311 |  | 3,379 | 34 |  |  | 68,966
| Total available-for-sale | $ | — | 31,449 | 44,912 | 191,242 | 267,603 |  | 5,351 | 1,480 |  | $ | 263,732
(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
June 30, 2015: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | — |  |  | — |  |  | 24,089 |  |  | 869 |  | $ | 24,089 |  |  | 869
Agency RMBS |  | 28,866 |  |  | 558 |  |  | 19,464 |  |  | 437 |  |  | 48,330 |  |  | 995
State and political subdivisions |  | 13,050 |  |  | 290 |  |  | — |  |  | — |  |  | 13,050 |  |  | 290
|  | Total | $ | 41,916 |  |  | 848 |  |  | 43,553 |  |  | 1,306 |  | $ | 85,469 |  |  | 2,154
December 31, 2014: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | — |  |  | — |  |  | 24,126 |  |  | 830 |  | $ | 24,126 |  |  | 830
Agency RMBS |  | 9,078 |  |  | 22 |  |  | 42,744 |  |  | 594 |  |  | 51,822 |  |  | 616
State and political subdivisions |  | 4,257 |  |  | 34 |  |  | — |  |  | — |  |  | 4,257 |  |  | 34
|  | Total | $ | 13,335 |  |  | 56 |  |  | 66,870 |  |  | 1,424 |  | $ | 80,205 |  |  | 1,480
Available For Sale Securiites Detail Of Other Than Temporary Impairment Losses [Table Text Block] |
|  |  |  |  | Quarter ended June 30, |  |  | Six Months Ended June 30,
(Dollars in thousands) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014
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 of securities.
|  |  |  |  | Quarter ended June 30, |  |  | Six Months Ended June 30,
(Dollars in thousands) |  |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014
Gross realized gains |  | $ | — |  | $ | 12 |  | $ | 3 |  | $ | 38
| Realized gains, net |  | $ | — |  | $ | 12 |  | $ | 3 |  | $ | 38

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