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Securities (Securities With Unrealized Losses) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |
Less than Twelve Months, Fair Value |  | $ 8,497 | $ 10,493
Less than Twelve Months, Unrealized Loss |  | 23 | 27
Twelve Months or More, Fair Value |  |  |
Twelve Months or More, Unrealized Loss |  |  |
Total, Fair Value |  | 8,497 | 10,493
Total, Unrealized Loss |  | 23 | 27
U.S. Treasury [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Less than Twelve Months, Fair Value |  | 8,496 | 10,492
Less than Twelve Months, Unrealized Loss |  | 23 | 27
Twelve Months or More, Fair Value |  |  |
Twelve Months or More, Unrealized Loss |  |  |
Total, Fair Value |  | 8,496 | 10,492
Total, Unrealized Loss |  | 23 | 27
Mortgage-Backed Securities - Residential [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Less than Twelve Months, Fair Value | [1] | 1 | 1
Less than Twelve Months, Unrealized Loss | [1] |  |
Twelve Months or More, Fair Value | [1] |  |
Twelve Months or More, Unrealized Loss | [1] |  |
Total, Fair Value | [1] | 1 | 1
Total, Unrealized Loss | [1] |  |
[1] | Securities with an unrealized loss were less than $1 resulting in rounding to zero.

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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 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) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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