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Note 14 - Regulatory Capital (Tables) | 3 Months Ended
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Mar. 31, 2015
Disclosure Text Block [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] |
|  | March 31, 2015 |  |  | December 31, 2014 |
|  | Amount |  |  | Percent of Assets |  |  | Amount |  |  | Percent of Assets |
|  | (Dollars in thousands) |
Tier I (leverage) capital: |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 474,337 |  |  |  | 9.28 | % |  | $ | 472,251 |  |  |  | 9.63 | %
Requirement to be well capitalized |  |  | 255,655 |  |  |  | 5.00 |  |  |  | 245,254 |  |  |  | 5.00 |
Excess |  |  | 218,682 |  |  |  | 4.28 |  |  |  | 226,997 |  |  |  | 4.63 |
Common Equity Tier I risk-based capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 474,337 |  |  |  | 13.06 | % |  |  | n/a |  |  |  | n/a |
Requirement to be well capitalized |  |  | 236,163 |  |  |  | 6.50 |  |  |  | n/a |  |  |  | n/a |
Excess |  |  | 238,174 |  |  |  | 6.56 |  |  |  | n/a |  |  |  | n/a |
Tier 1 risk-based capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 474,337 |  |  |  | 13.06 | % |  | $ | 472,251 |  |  |  | 13.87 | %
Requirement to be well capitalized |  |  | 290,662 |  |  |  | 8.00 |  |  |  | 204,345 |  |  |  | 6.00 |
Excess |  |  | 183,675 |  |  |  | 5.06 |  |  |  | 267,906 |  |  |  | 7.87 |
Total risk-based capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 498,428 |  |  |  | 13.72 | % |  | $ | 497,347 |  |  |  | 14.60 | %
Requirement to be well capitalized |  |  | 363,328 |  |  |  | 10.00 |  |  |  | 340,589 |  |  |  | 10.00 |
Excess |  |  | 135,100 |  |  |  | 3.72 |  |  |  | 156,758 |  |  |  | 4.60 |
|  | March 31, 2015 |  |  | December 31, 2014 |
|  | Amount |  |  | Percent of Assets |  |  | Amount |  |  | Percent of Assets |
|  | (Dollars in thousands) |
Tier I (leverage) capital: |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 475,860 |  |  |  | 9.32 | % |  | $ | 471,233 |  |  |  | 9.62 | %
Requirement to be well capitalized |  |  | 255,216 |  |  |  | 5.00 |  |  |  | 244,960 |  |  |  | 5.00 |
Excess |  |  | 220,644 |  |  |  | 4.32 |  |  |  | 226,273 |  |  |  | 4.62 |
Common Equity Tier I risk-based capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 448,564 |  |  |  | 12.37 | % |  |  | n/a |  |  |  | n/a |
Requirement to be well capitalized |  |  | 235,731 |  |  |  | 6.50 |  |  |  | n/a |  |  |  | n/a |
Excess |  |  | 212,833 |  |  |  | 5.87 |  |  |  | n/a |  |  |  | n/a |
Tier 1 risk-based capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 475,860 |  |  |  | 13.12 | % |  | $ | 471,233 |  |  |  | 13.87 | %
Requirement to be well capitalized |  |  | 290,131 |  |  |  | 8.00 |  |  |  | 203,878 |  |  |  | 6.00 |
Excess |  |  | 185,729 |  |  |  | 5.12 |  |  |  | 267,355 |  |  |  | 7.87 |
Total risk-based capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital level |  | $ | 499,951 |  |  |  | 13.79 | % |  | $ | 496,329 |  |  |  | 14.61 | %
Requirement to be well capitalized |  |  | 362,663 |  |  |  | 10.00 |  |  |  | 339,797 |  |  |  | 10.00 |
Excess |  |  | 137,288 |  |  |  | 3.79 |  |  |  | 156,532 |  |  |  | 4.61 |

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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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