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Note 20 - Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2014
Disclosure Text Block [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] |
|  | Company |  |  | Bank |  |  | For Capital Adequacy |  |  | To Be Well Capitalized Under |
(dollars in thousands) |  | Actual Amount |  |  | Ratio |  |  | Actual Amount |  |  | Ratio |  |  | Purposes Ratio |  |  | Prompt Corrective Action Provision Ratio * |
As of December 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk weighted assets) |  | $ | 631,340 |  |  |  | 12.97 | % |  | $ | 568,637 |  |  |  | 11.73 | % |  |  | 8.0 | % |  |  | 10.0 | %
Tier 1 capital (to risk weighted assets) |  |  | 505,864 |  |  |  | 10.39 | % |  |  | 522,637 |  |  |  | 10.78 | % |  |  | 4.0 | % |  |  | 6.0 | %
Tier 1 capital (to average assets) |  |  | 505,864 |  |  |  | 10.69 | % |  |  | 522,637 |  |  |  | 11.09 | % |  |  | 3.0 | % |  |  | 5.0 | %
As of December 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk weighted assets) |  | $ | 440,332 |  |  |  | 13.01 | % |  | $ | 403,910 |  |  |  | 12.00 | % |  |  | 8.0 | % |  |  | 10.0 | %
Tier 1 capital (to risk weighted assets) |  |  | 390,111 |  |  |  | 11.53 | % |  |  | 363,166 |  |  |  | 10.79 | % |  |  | 4.0 | % |  |  | 6.0 | %
Tier 1 capital (to average assets) |  |  | 390,111 |  |  |  | 10.93 | % |  |  | 363,166 |  |  |  | 10.22 | % |  |  | 3.0 | % |  |  | 5.0 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958577-112826 + Details
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