Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] |
| | | | | | | | Minimum for capital | | Minimum to be | | | Actual | | adequacy purposes | | well capitalized | (Dollars in thousands) | | Amount | | Ratio | | | | Amount | | Ratio | | | | Amount | | Ratio | | At December 31, 2018: | | | | | | | | | | | | | | | | | | Tier 1 Leverage Capital | | | | | | | | | | | | | | | | | | | AuburnBank | $ | 91,719 | | 11.33 | % | | $ | 32,368 | | 4.00 | % | | $ | 40,461 | | 5.00 | % | Common Equity Tier 1 Capital | | | | | | | | | | | | | | | | | | | AuburnBank | $ | 91,719 | | 16.49 | % | | $ | 25,031 | | 4.50 | % | | $ | 36,156 | | 6.50 | % | Tier 1 Risk-Based Capital | | | | | | | | | | | | | | | | | | | AuburnBank | $ | 91,719 | | 16.49 | % | | $ | 33,375 | | 6.00 | % | | $ | 44,500 | | 8.00 | % | Total Risk-Based Capital | | | | | | | | | | | | | | | | | | | AuburnBank | $ | 96,661 | | 17.38 | % | | $ | 44,500 | | 8.00 | % | | $ | 55,625 | | 10.00 | % | At December 31, 2017: | | | | | | | | | | | | | | | | | | Tier 1 Leverage Capital | | | | | | | | | | | | | | | | | | | Auburn National Bancorporation | $ | 90,382 | | 10.95 | % | | $ | 33,012 | | 4.00 | % | | | N/A | | N/A | | | AuburnBank | | 89,217 | | 10.82 | | | | 32,978 | | 4.00 | | | $ | 41,222 | | 5.00 | % | | | | | | | | | | | | | | | | | | | | Common Equity Tier 1 Capital | | | | | | | | | | | | | | | | | | | Auburn National Bancorporation | $ | 87,382 | | 16.42 | % | | $ | 23,949 | | 4.50 | % | | | N/A | | N/A | | | AuburnBank | | 89,217 | | 16.74 | | | | 23,987 | | 4.50 | | | $ | 34,648 | | 6.50 | % | | | | | | | | | | | | | | | | | | | | Tier 1 Risk-Based Capital | | | | | | | | | | | | | | | | | | | Auburn National Bancorporation | $ | 90,382 | | 16.98 | % | | $ | 31,932 | | 6.00 | % | | | N/A | | N/A | | | AuburnBank | | 89,217 | | 16.74 | | | | 31,983 | | 6.00 | | | $ | 42,644 | | 8.00 | % | | | | | | | | | | | | | | | | | | | | Total Risk-Based Capital | | | | | | | | | | | | | | | | | | | Auburn National Bancorporation | $ | 95,300 | | 17.91 | % | | $ | 42,576 | | 8.00 | % | | | N/A | | N/A | | | AuburnBank | | 94,135 | | 17.66 | | | | 42,644 | | 8.00 | | | $ | 53,305 | | 10.00 | % |
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