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Other Borrowings (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Short-term Debt [Line Items] |  |
Reverse repurchase agreements | $ 5,000 |
Credit through FHLBA | 143,615 |
FHLBA additional credit | 31,249 |
Borrowed amount from FHLBA | 39,500 |
Unsecured Federal Funds Outstanding Amount | 0 | $ 0
Community Bankers Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 11,000 |
Zions Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 4,000 |
PNC Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 6,000 |
Suntrust Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | $ 3,000 |
Maximum [Member] |  |
Short-term Debt [Line Items] |  |
Period allowed to exchange securities pledged as collateral for funds | 90 days |
Minimum [Member] |  |
Short-term Debt [Line Items] |  |
Period allowed to exchange securities pledged as collateral for funds | 30 days |

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- Definition Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions + References No definition available. + Details
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- Definition Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions. + References No definition available. + Details
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- Definition The cash inflow from a borrowing made from Federal Home Loan Bank. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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