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Investment in Securities (Schedule of the Fair Values of Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investment [Line Items]
Estimated fair value less than 12 months	$ 3,638	$ 8,700
Estimated fair value 12 months or more	1,208	13,833
Estimated fair value total	4,846	22,533
Unrealized losses, less than 12 months	5	15
Unrealized losses, 12 months or more	8	183
Unrealized losses, total	13	198
State and Political Subdivisions [Member]
Investment [Line Items]
Estimated fair value less than 12 months	3,638	8,700
Estimated fair value 12 months or more	1,208	13,833
Estimated fair value total	4,846	22,533
Unrealized losses, less than 12 months	5	15
Unrealized losses, 12 months or more	8	183
Unrealized losses, total	$ 13	$ 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
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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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