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Note 5 - Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2013
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] |
|  | Three Months Ended March 31, |
|  | 2013 |  |  | 2012 |
Numerator |  |  |  |  |  |  |  |
Net income |  | $ | 11,094 |  |  | $ | 12,572 |
Preferred stock dividends |  |  | (138 | ) |  |  | (138 | )
Net income applicable to common shares for basic and diluted earnings per share |  | $ | 10,956 |  |  | $ | 12,434 |
Denominator |  |  |  |  |  |  |  |
Basic weighted average common shares |  |  | 285,171 |  |  |  | 285,292 |
Dilutive stock options and restricted stock |  |  | 11,993 |  |  |  | 11,636 |
Diluted weighted average common shares |  |  | 297,164 |  |  |  | 296,928 |
Basic earnings per common share |  |  |  |  |  |  |  |
Net income applicable to common shares |  | $ | 0.04 |  |  | $ | 0.04 |
Diluted earnings per common share |  |  |  |  |  |  |  |
Net income applicable to common shares |  | $ | 0.04 |  |  | $ | 0.04 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration