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Concentrations of Credit Risk (Details Textual) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Credit Extending Terms To Borrowers | The Banks, as a matter of policy, do not generally extend credit to any single borrower or group of related borrowers in excess of 25% of statutory capital, or approximately $9,929,000 in case of Cornerstone Community Bank and $14,136,000 in the case of SmartBank. |
Commercial Real Estate Portfolio Segment [Member] |  |
Concentration Risk, Percentage | 65.00% | 68.00%

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