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Investments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 6 Months Ended | 12 Months Ended |  | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended |
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Jun. 01, 2014 | Jun. 30, 2014 | Dec. 31, 2012 | Dec. 31, 2013 | Jun. 30, 2014 U.S. Treasury [Member] security | Jun. 30, 2014 U.S. Government Agencies [Member] security | Dec. 31, 2012 U.S. Government Agencies [Member] | Jun. 30, 2014 Residential Mortgage-backed Agencies [Member] security | Dec. 31, 2012 Residential Mortgage-backed Agencies [Member] | Jun. 30, 2014 Commercial Mortgage-backed Agencies [Member] security | Dec. 31, 2012 Commercial Mortgage-backed Agencies [Member] | Jun. 30, 2014 Collateralized Mortgage Obligations [Member] | Dec. 31, 2012 Collateralized Mortgage Obligations [Member] | Jun. 30, 2014 Obligations of States and Political Subdivisions [Member] security | Dec. 31, 2013 Obligations of States and Political Subdivisions [Member] | Dec. 31, 2012 Obligations of States and Political Subdivisions [Member] | Jun. 30, 2014 Collateralized Debt Obligations [Member] security | Dec. 31, 2012 Collateralized Debt Obligations [Member] | Jun. 30, 2014 Less Than 12 Months [Member] U.S. Government Agencies [Member] security | Jun. 30, 2014 Less Than 12 Months [Member] Residential Mortgage-backed Agencies [Member] security | Jun. 30, 2014 Less Than 12 Months [Member] Commercial Mortgage-backed Agencies [Member] security | Jun. 30, 2014 Less Than 12 Months [Member] Collateralized Mortgage Obligations [Member] security | Jun. 30, 2014 Less Than 12 Months [Member] Obligations of States and Political Subdivisions [Member] security | Jun. 30, 2014 12 Months or More [Member] U.S. Government Agencies [Member] security | Jun. 30, 2014 12 Months or More [Member] Residential Mortgage-backed Agencies [Member] security | Jun. 30, 2014 12 Months or More [Member] Commercial Mortgage-backed Agencies [Member] security | Jun. 30, 2014 12 Months or More [Member] Collateralized Mortgage Obligations [Member] security | Jun. 30, 2014 12 Months or More [Member] Obligations of States and Political Subdivisions [Member] security
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity securities | $ 107,600 | $ 107,586 |  | $ 3,900 |  | $ 24,431 |  | $ 55,756 |  | $ 16,524 |  | $ 8,150 |  | $ 2,725 | $ 3,900 |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity Gross Unrealized Losses | 4,000 | 572 |  |  |  | 137 |  | 32 |  | 40 |  | 40 |  | 323 | 559 |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, nature |  |  |  |  |  | U.S. Government Treasuries – Available for Sale - One U.S. government treasury has been in an unrealized loss position for less than 12 months as of June 30, 2014. There were no U.S. government treasuries in an unrealized loss position for 12 months or more. The security is of the highest investment grade and the Corporation does not intend to sell it, and it is not more likely than not that the Corporation will be required to sell it before recovery of its amortized cost basis, which may be at maturity. Accordingly, management does not consider this investment to be other-than-temporarily impaired at June 30, 2014.U.S. Government Agencies – Available for Sale – There were no U.S. government agencies in an unrealized loss position for less than 12 months as of June 30, 2014. There were three U.S. government agencies in an unrealized loss position for 12 months or more. The securities are of the highest investment grade and the Corporation does not intend to sell them, and it is not more likely than not that the Corporation will be required to sell them before recovery of their amortized cost basis, which may be at maturity. Accordingly, management does not consider these investments to be other-than-temporarily impaired at June 30, 2014. |  | Residential Mortgage-Backed Agencies – Available for Sale - There were no residential mortgage-backed agencies in an unrealized loss position for less than 12 months as of June 30, 2014. There were four residential mortgage-backed agency securities in an unrealized loss position for 12 months or more. The securities are of the highest investment grade and the Corporation does not intend to sell them, and it is not more likely than not that the Corporation will be required to sell the securities before recovery of their amortized cost basis, which may be at maturity. Accordingly, management does not consider these investments to be other-than-temporarily impaired at June 30, 2014.Commercial Mortgage-Backed Agencies – Available for Sale – There were two commercial mortgage-backed agencies in an unrealized loss position for less than 12 months as of June 30, 2014. There were no commercial mortgage-backed agency securities in an unrealized loss position for 12 months or more. The securities are of the highest investment grade and the Corporation does not intend to sell them, and it is not more likely than not that the Corporation will be required to sell them before recovery of their amortized cost basis, which may be at maturity. Accordingly, management does not consider this investment to be other-than-temporarily impaired at June 30, 2014. Obligations of State and Political Subdivisions – Available for Sale - No securities have been in an unrealized loss position for less than 12 months at June 30, 2014. There were six securities that have been in an unrealized loss position for 12 months or more. These investments are of investment grade as determined by the major rating agencies and management reviews the ratings of the underlying issuers and performs an in-depth credit analysis on the securities. Management believes that this portfolio is well-diversified throughout the United States, and all bonds continue to perform according to their contractual terms. The Corporation does not intend to sell these investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be at maturity. Accordingly, management does not consider these investments to be other-than-temporarily impaired at June 30, 2014.Collateralized Debt Obligations – Available for Sale - The $14.4 million in unrealized losses greater than 12 months at June 30, 2014 relates to 14 pooled trust preferred securities that are included in the CDO portfolio. See Note 9 for a discussion of the methodology used by management to determine the fair values of these securities. Based upon a review of credit quality and the cash flow tests performed by the independent third party, management determined that there were no securities that had credit-related non-cash OTTI charges during the first six months of 2014. The unrealized losses on the remaining securities in the portfolio are primarily attributable to continued depression in market interest rates, marketability, liquidity and the current economic environment. U.S. Government Agencies – Held to Maturity - Three U.S. government agencies have been in an unrealized loss position for less than 12 months as of June 30, 2014. There were no U.S. government agencies in an unrealized loss position for 12 months or more. The Corporation has the intent and ability to hold the investments to maturity. Accordingly, management does not consider these investments to be other-than-temporarily impaired at June 30, 2014.Residential Mortgage-Backed Agencies – Held to Maturity - Three residential mortgage-backed agencies have been in an unrealized loss position for less than 12 months as of June 30, 2014. There were no residential mortgage-backed agencies in an unrealized loss position for 12 months or more. The Corporation has the intent and ability to hold the investments to maturity. Accordingly, management does not consider these investments to be other-than-temporarily impaired at June 30, 2014. |  |  |  | Commercial Mortgage-Backed Agencies – Held to Maturity - One commercial mortgage-backed agency has been in an unrealized loss position for less than 12 months as of June 30, 2014. There were no commercial mortgage-backed agencies in an unrealized loss position for 12 months or more. The Corporation has the intent and ability to hold this investment to maturity. Accordingly, management does not consider this investment to be other-than-temporarily impaired at June 30, 2014. |  | Collateralized Mortgage-Obligations – Held to Maturity - One collateralized mortgage obligation has been in an unrealized loss position for less than 12 months as of June 30, 2014. There were no collateralized mortgage obligations in an unrealized loss position for 12 months or more. The Corporation has the intent and ability to hold the investment to maturity. Accordingly, management does not consider this investment to be other-than-temporarily impaired at June 30, 2014. |  |  | Obligations of State and Political Subdivisions – Held to Maturity – No securities have been in an unrealized loss position for less than 12 months at June 30, 2014. There was one security that has been in an unrealized loss position for 12 months or more. Management performs an in-depth credit analysis on this security. The Corporation has the intent and ability to hold the investment to maturity. Accordingly, management does not consider this investment to be other-than-temporarily impaired at June 30, 2014. |  |  |  |  |  |  |  |  |  |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, less than one year |  |  |  |  | 1 | 0 |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Held-to-maturity, securities in unrealized loss positions, qualitative disclosure, number of positions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year |  |  |  |  | 0 | 3 |  | 4 |  | 0 |  |  |  | 6 |  |  | 14 |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |  | 35 | 8,361 |  | 0 | 0 | 3,154 | 0 | 1,801 | 35 | 1,134 |  | 1,149 | 0 |  | 1,123 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |  | $ 15,920 | $ 25,488 |  | $ 0 | $ 440 | $ 2,067 | $ 730 | $ 3,022 | $ 0 | $ 0 |  | $ 13 | $ 343 |  | $ 0 | $ 14,407 | $ 20,386 |  |  |  |  |  |  |  |  |  |

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