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Investments (Narrative) (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 USD ($) security | Dec. 31, 2017 USD ($)
Schedule of Investments [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses | $ | $ 7,114 | $ 6,695
US government agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, nature | U.S. Government Agencies – Available for Sale – There were no U.S. government agency investments in an unrealized loss position for less than 12 months as of September 30, 2018. There were five U.S. government agency investments in an unrealized loss position for more than 12 months as of September 30, 2018. The securities are of investment grade and the Corporation does not intend to sell them, and it is not more than 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 September 30, 2018. |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, less than one year | 0 |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | 5 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses | $ | $ 1,435 | 675
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature | U.S. Government Agencies – Held to Maturity – There were two U.S. government agencies in an unrealized loss position for less than 12 months as of September 30, 2018. There were no U.S. government agency investments in an unrealized loss position for more than 12 months as of September 30, 2018. The securities are of investment grade and the Corporation does not intend to sell them, and it is not more than 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 September 30, 2018. |
Held-to-maturity, securities in unrealized loss positions less than twelve months, qualitative disclosure, number of positions | 2 |
Held-to-maturity, securities in unrealized loss positions greater than twelve months, qualitative disclosure, number of positions | 0 |
Residential mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature | Residential Mortgage-Backed Agencies – Held to Maturity – There were thirteen residential mortgage-backed agencies in an unrealized loss position for less than 12 months as of September 30, 2018. There were eighteen residential mortgage-backed agency investments in an unrealized loss position for more than 12 months as of September 30, 2018. The securities are of the highest investment grade and 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 September 30, 2018. |
Held-to-maturity, securities in unrealized loss positions less than twelve months, qualitative disclosure, number of positions | 13 |
Held-to-maturity, securities in unrealized loss positions greater than twelve months, qualitative disclosure, number of positions | 18 |
Commercial mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, nature | Commercial Mortgage-Backed Agencies – Available for Sale – There were no commercial mortgage-backed agencies in an unrealized loss position for less than 12 months as of September 30, 2018. There were eight commercial mortgage-backed agencies in an unrealized loss position for more than 12 months as of September 30, 2018. The securities are of the highest investment grade and 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 September 30, 2018. |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, less than one year | 0 |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | 8 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses | $ | $ 1,802 | 711
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature | Commercial Mortgage-Backed Agencies – Held to Maturity - There were four commercial mortgage-backed agency investments in an unrealized loss position for less than 12 months as of September 30, 2018. The securities are of the highest investment grade and 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 September 30, 2018. There were no commercial mortgage-backed agencies in a loss position for more than 12 months as of September 30, 2018. |
Held-to-maturity, securities in unrealized loss positions less than twelve months, qualitative disclosure, number of positions | 4 |
Held-to-maturity, securities in unrealized loss positions greater than twelve months, qualitative disclosure, number of positions | 0 |
Collateralized mortgage obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, nature | Collateralized Mortgage Obligations – Available for Sale – There was one collateralized mortgage obligation in an unrealized loss position for less than 12 months as of September 30, 2018. There were eight collateralized mortgage obligations in an unrealized loss position for more than 12 months as of September 30, 2018. The securities are of the highest investment grade and 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 September 30, 2018. |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, less than one year | 1 |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | 8 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses | $ | $ 1,777 | 443
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature | Collateralized Mortgage Obligations – Held to Maturity – There were no collateralized mortgage obligations in an unrealized loss position for less than 12 months as of September 30, 2018. There was one collateralized mortgage obligation in a loss position for more than 12 months as of September 30, 2018. The security is of the highest investment grade and 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 September 30, 2018. |
Held-to-maturity, securities in unrealized loss positions less than twelve months, qualitative disclosure, number of positions | 0 |
Held-to-maturity, securities in unrealized loss positions greater than twelve months, qualitative disclosure, number of positions | 1 |
Obligations of states and political subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, nature | Obligations of State and Political Subdivisions – Available for Sale – There were 11 obligations of state and political subdivisions that have been in an unrealized loss position for less than 12 months and three securities that have been in an unrealized loss position for 12 months or more at September 30, 2018. 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 September 30, 2018. |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, less than one year | 11 |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | 3 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses | $ | $ 243 | 75
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature | Obligations of State and Political Subdivisions – Held to Maturity –There was one obligation of state and political subdivisions that has been in an unrealized loss for less than 12 months as of September 30, 2018. The security is of the highest investment grade and 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 September 30, 2018. There were no obligations of state and political subdivisions securities in an unrealized loss position for more than 12 months as of September 30, 2018. |
Held-to-maturity, securities in unrealized loss positions less than twelve months, qualitative disclosure, number of positions | 1 |
Held-to-maturity, securities in unrealized loss positions greater than twelve months, qualitative disclosure, number of positions | 0 |
Collateralized debt obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, nature | Collateralized Debt Obligations – Available for Sale - The $1.9 million in unrealized losses recorded with respect to the CDOs that had been in an unrealized loss position for 12 months or more as of September 30, 2018 relates to five pooled trust preferred securities. 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 nine months of 2018. At September 30, 2018, four of the CDO securities were in an unrealized gain position. |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | 5 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses | $ | $ 1,857 | $ 4,791
Available-for-sale securities, unrealized gain position, number of securities | 4 |

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