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Note 2 - Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The calculation of the basic and diluted net income per share was as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In thousands, except per-share amounts) | 2016 |  | 2015 |  | 2016 |  | 2015
Net income from continuing operations: |  |  |  |  |  |  |
Net income from continuing operations - basic | $ | 82,803 |  |  | $ | 70,091 |  |  | $ | 247,164 |  |  | $ | 207,011 |
Adjustment for dilutive Convertible Senior Notes due 2019, net of tax (1) | 848 |  |  | 3,714 |  |  | 5,151 |  |  | 11,094 |
Net income from continuing operations - diluted | $ | 83,651 |  |  | $ | 73,805 |  |  | $ | 252,315 |  |  | $ | 218,105 |
Net income: |  |  |  |  |  |  |
Net income from continuing operations - basic | $ | 82,803 |  |  | $ | 70,091 |  |  | $ | 247,164 |  |  | $ | 207,011 |
Income (loss) from discontinued operations, net of tax | — |  |  | — |  |  | — |  |  | 5,385 |
Net income - basic | 82,803 |  |  | 70,091 |  |  | 247,164 |  |  | 212,396 |
Adjustment for dilutive Convertible Senior Notes due 2019, net of tax (1) | 848 |  |  | 3,714 |  |  | 5,151 |  |  | 11,094 |
Net income - diluted | $ | 83,651 |  |  | $ | 73,805 |  |  | $ | 252,315 |  |  | $ | 223,490 |
Average common shares outstanding - basic | 214,387 |  |  | 207,938 |  |  | 210,858 |  |  | 197,562 |
Dilutive effect of Convertible Senior Notes due 2017 (2) | 178 |  |  | 1,798 |  |  | 71 |  |  | 8,620 |
Dilutive effect of Convertible Senior Notes due 2019 | 8,274 |  |  | 37,736 |  |  | 16,897 |  |  | 37,736 |
Dilutive effect of stock-based compensation arrangements (2) | 3,129 |  |  | 3,323 |  |  | 2,846 |  |  | 3,075 |
Adjusted average common shares outstanding - diluted | 225,968 |  |  | 250,795 |  |  | 230,672 |  |  | 246,993 |
Net income per share: |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |
Net income from continuing operations | $ | 0.39 |  |  | $ | 0.34 |  |  | $ | 1.17 |  |  | $ | 1.05 |
Income (loss) from discontinued operations, net of tax | — |  |  | — |  |  | — |  |  | 0.03 |
Net income | $ | 0.39 |  |  | $ | 0.34 |  |  | $ | 1.17 |  |  | $ | 1.08 |
Diluted: |  |  |  |  |  |  |
Net income from continuing operations | $ | 0.37 |  |  | $ | 0.29 |  |  | $ | 1.09 |  |  | $ | 0.88 |
Income (loss) from discontinued operations, net of tax | — |  |  | — |  |  | — |  |  | 0.02 |
Net income | $ | 0.37 |  |  | $ | 0.29 |  |  | $ | 1.09 |  |  | $ | 0.90 |
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(1) | As applicable, includes coupon interest, amortization of discount and fees, and other changes in income or loss that would result from the assumed conversion.
(2) | The following number of shares of our common stock equivalents issued under our stock-based compensation arrangements and convertible debt were not included in the calculation of diluted net income per share because they were anti-dilutive:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Shares of common stock equivalents | 1,045 |  |  | 469 |  |  | 1,045 |  |  | 730 |
Shares of Convertible Senior Notes due 2017 | — |  |  | — |  |  | 1,902 |  |  | — |

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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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