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Investment Securities Maturity of Held-to-Maturity Securities (Tables) | 3 Months Ended
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Mar. 31, 2015
Schedule of Held-to-maturity Securities [Line Items] |
Held-to-maturity Securities [Table Text Block] | Below is an analysis of the amortized cost and fair values of debt securities held to maturity at March 31, 2015. There were no held to maturity securities at December 31, 2014.
| March 31, 2015
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
| (dollars in thousands)
Obligations of U.S. Government-Sponsored Enterprises: |  |  |  |  |  |  |
Mortgage-Backed Securities – Residential | $ | 26,315 |  |  | $ | — |  |  | $ | (98 | ) |  | $ | 26,217 |
Obligations of States and Political Subdivisions | 3,938 |  |  | 19 |  |  | — |  |  | 3,957 |
Total Securities Held to Maturity | $ | 30,253 |  |  | $ | 19 |  |  | $ | (98 | ) |  | $ | 30,174 |
Schedule of Held-to-Maturity Securities by Maturity [Table Text Block] | The amortized cost and estimated fair value of debt securities held to maturity at March 31, 2015, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or repay obligations with or without call or prepayment penalties.
| Amortized Cost |  | Estimated Fair Value
| (dollars in thousands)
Due within 1 year | $ | — |  |  | $ | — |
Due after 1 but within 5 years | — |  |  | — |
Due after 5 but within 10 years | — |  |  | — |
Due after 10 years | 3,938 |  |  | 3,957 |
| 3,938 |  |  | 3,957 |
Mortgage-Backed Securities (a) | 26,315 |  |  | 26,217 |
Total Debt Securities | $ | 30,253 |  |  | $ | 30,174 |
(a) | Mortgage Backed Securities include an amortized cost of $26.3 million and a fair value of $26.2 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.

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