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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] |
|  |  | 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
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | 5,000 | 25,852 | 19,463 | 9,770 | 60,085 |  | 384 | 518 |  | $ | 60,219
Agency RMBS (a) |  | — | 1,623 | 13,511 | 95,820 | 110,954 |  | 968 | 780 |  |  | 110,766
State and political subdivisions |  | — | 497 | 12,094 | 58,057 | 70,648 |  | 3,022 | 7 |  |  | 67,633
| Total available-for-sale | $ | 5,000 | 27,972 | 45,068 | 163,647 | 241,687 |  | 4,374 | 1,305 |  | $ | 238,618
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
December 31, 2015: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | 8,157 |  |  | 2 |  |  | 24,444 |  |  | 516 |  |  | 32,601 |  | $ | 518
Agency RMBS |  | 42,345 |  |  | 367 |  |  | 18,184 |  |  | 413 |  |  | 60,529 |  |  | 780
State and political subdivisions |  | 267 |  |  | 1 |  |  | 969 |  |  | 6 |  |  | 1,236 |  |  | 7
|  | Total | $ | 50,769 |  |  | 370 |  |  | 43,597 |  |  | 935 |  |  | 94,366 |  | $ | 1,305
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] |
|  |  |  |  |  | Year ended December 31
(Dollars in thousands) |  |  | 2015 |  |  | 2014
Other-than-temporary impairment charges (included in earnings): |  |  |  |  |  |
| Debt securities: |  |  |  |  |  |
|  | Agency RMBS |  | $ | — |  |  | 333
|  |  | Total debt securities |  | $ | — |  |  | 333
Total other-than-temporary impairment charges (included in earnings) |  | $ | — |  |  | 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.
|  |  |  | Year ended December 31
(Dollars in thousands) |  |  | 2015 |  |  | 2014
Gross realized gains |  | $ | 16 |  |  | 467
Gross realized losses |  |  | — |  |  | (664)
| Realized gains (losses), net |  | $ | 16 |  |  | (197)

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