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Securities (Securities With Unrealized Losses) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Less than Twelve Months, Fair Value | $ 4,893 | $ 6,947
Less than Twelve Months, Unrealized Loss | 82 | 51
Twelve Months or More, Fair Value | 5,911 | 4,470
Twelve Months or More, Unrealized Loss | 89 | 31
Total, Fair Value | 10,804 | 11,417
Total, Unrealized Loss | 171 | 82
U.S. Treasury [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than Twelve Months, Fair Value | 4,893 | 6,947
Less than Twelve Months, Unrealized Loss | 82 | 51
Twelve Months or More, Fair Value | 5,911 | 4,470
Twelve Months or More, Unrealized Loss | 89 | 31
Total, Fair Value | 10,804 | 11,417
Total, Unrealized Loss | $ 171 | $ 82

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- Definition 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 No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition 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 less than twelve months. + References No definition available. + Details
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