Note 13 - Regulatory Capital - Required Capital Ratios with Conversion Buffers (Details)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Common equity tier 1 capital (CET1)	7.00%	6.375%	5.75%	5.125%
Tier 1 capital (to risk weighted assets)	8.50%	7.875%	7.25%	6.625%
Total capital (to risk-weighted assets)	10.50%	9.875%	9.25%	8.625%

The minimum Common Equity Tier One Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets), including a capital buffer, required for capital adequacy purposes under the regulatory framework for prompt corrective action.

No definition available.

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