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Note 2 - Net Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The calculation of basic and diluted net income per share is as follows:
| Three Months Ended March 31,
(In thousands, except per-share amounts) | 2020 |  | 2019
Net income—basic and diluted | $ | 140,461 |  |  | $ | 170,957 |
Average common shares outstanding—basic (1) | 200,161 |  |  | 213,537 |
Dilutive effect of share-based compensation arrangements (2) | 1,658 |  |  | 4,806 |
Adjusted average common shares outstanding—diluted | 201,819 |  |  | 218,343 |
Net income per share: |  |  |
Basic | $ | 0.70 |  |  | $ | 0.80 |
Diluted | $ | 0.70 |  |  | $ | 0.78 |
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(1) | Includes the impact of fully vested shares under our share-based compensation programs.
(2) | The following number of shares of our common stock equivalents issued under our share-based compensation arrangements were not included in the calculation of diluted net income per share because they were anti-dilutive:
| Three Months Ended March 31,
(In thousands) | 2020 |  | 2019
Shares of common stock equivalents | 132 |  |  | 169 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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