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Note 1 - Interim Financial Statements (Tables) | 9 Months Ended
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Sep. 30, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30 , |  |  | September 30 , |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2 01 6 |
Computation of Basic and Diluted Earnings/(Loss) Per Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income /(loss) available to the Company's common shareholders |  |  | 101,957 |  |  |  | (55,100 | ) |  |  | 298,996 |  |  |  | 265,912 |
Earnings attributable to participating securities |  |  | (526 | ) |  |  | (502 | ) |  |  | (1,596 | ) |  |  | (1,493 | )
Net income /(loss) available to the Company’s common shareholders for basic earnings/(loss) per share |  |  | 101,431 |  |  |  | (55,602 | ) |  |  | 297,400 |  |  |  | 264,419 |
Distributions on convertible units |  |  | 24 |  |  |  | - |  |  |  | 43 |  |  |  | - |
Net income /(loss) available to the Company’s common shareholders for diluted earnings/(loss) per share |  |  | 101,455 |  |  |  | (55,602 | ) |  |  | 297,443 |  |  |  | 264,419 |
Weighted average common shares outstanding – basic |  |  | 423,688 |  |  |  | 420,073 |  |  |  | 423,574 |  |  |  | 416,829 |
Effect of dilutive securities (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity awards |  |  | 513 |  |  |  | - |  |  |  | 556 |  |  |  | 1,405 |
Assumed conversion of convertible units |  |  | 110 |  |  |  | - |  |  |  | 63 |  |  |  | - |
Weighted average common shares outstanding – diluted |  |  | 424,311 |  |  |  | 420,073 |  |  |  | 424,193 |  |  |  | 418,234 |
Net income /(loss) available to the Company's common shareholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings/(loss) per share |  |  | 0.24 |  |  |  | (0.13 | ) |  |  | 0.70 |  |  |  | 0.63 |
Diluted earnings/(loss) per share |  |  | 0.24 |  |  |  | (0.13 | ) |  |  | 0.70 |  |  |  | 0.63 |

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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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