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Note 9 - Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended March 31, |
|  | 2015 |  |  | 2014 |
Net income (numerator) |  | $ | 19,685 |  |  | $ | 34,701 |
Weighted average shares (denominator) |  |  |  |  |  |  |  |
Basic |  |  | 68,806,337 |  |  |  | 68,421,800 |
Dilutive effect of stock compensation awards (1) |  |  | 1,282,598 |  |  |  | 1,586,690 |
Diluted |  |  | 70,088,935 |  |  |  | 70,008,490 |
Net income per share |  |  |  |  |  |  |  |
Basic |  | $ | 0.29 |  |  | $ | 0.51 |
Diluted |  | $ | 0.28 |  |  | $ | 0.50 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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