Investment in Securities (Schedule of the Fair Values of Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Estimated fair value, less than 12 months	$ 19,339	$ 8,700
Estimated fair value, 12 months or more	1,206	13,833
Estimated fair value, total	20,545	22,533
Unrealized losses, less than 12 months	57	15
Unrealized losses, 12 months or more	19	183
Unrealized losses, total	76	198
State and Political Subdivisions [Member]
Investment [Line Items]
Estimated fair value, less than 12 months	19,339	8,700
Estimated fair value, 12 months or more	1,206	13,833
Estimated fair value, total	20,545	22,533
Unrealized losses, less than 12 months	57	15
Unrealized losses, 12 months or more	19	183
Unrealized losses, total	$ 76	$ 198
Certificates Of deposit [Member]
Investment [Line Items]
Estimated fair value, less than 12 months
Estimated fair value, 12 months or more
Estimated fair value, total
Unrealized losses, less than 12 months
Unrealized losses, 12 months or more
Unrealized losses, total

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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