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Note 2 - Net Income Per Share Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Net income From continuing operations - diluted |  | $ 83,651 | $ 73,805 | $ 252,315 | $ 218,105
Net income - diluted |  | $ 83,651 | $ 73,805 | $ 252,315 | $ 223,490
Dilutive effect of stock-based compensation arrangements (2) | [1] | 3,129 | 3,323 | 2,846 | 3,075
Adjusted average common shares outstanding - diluted |  | 225,968 | 250,795 | 230,672 | 246,993
Net income from continuing operations, per diluted share |  | $ 0.37 | $ 0.29 | $ 1.09 | $ 0.88
Income from discontinued operations and disposal of discontinued operations, net of tax, per diluted share |  | 0.00 | 0.00 | 0.00 | 0.02
Net income per share - diluted |  | $ 0.37 | $ 0.29 | $ 1.09 | $ 0.90
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Net income from continuing operations - basic |  | $ 82,803 | $ 70,091 | $ 247,164 | $ 207,011
Income (loss) from discontinued operations, net of tax |  | 0 | 0 | 0 | 5,385
Net income - basic |  | $ 82,803 | $ 70,091 | $ 247,164 | $ 212,396
Average common shares outstanding - basic |  | 214,387 | 207,938 | 210,858 | 197,562
Net income from continuing operations, per basic share |  | $ 0.39 | $ 0.34 | $ 1.17 | $ 1.05
Income from discontinued operations and disposal of discontinued operations, net of tax, per basic share |  | 0.00 | 0.00 | 0.00 | 0.03
Net income per share - basic |  | $ 0.39 | $ 0.34 | $ 1.17 | $ 1.08
Convertible Debt | Convertible Senior Notes Due 2019 |  |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Adjustment for dilutive Convertible Senior Notes due 2019, net of tax (1) | [2] | $ 848 | $ 3,714 | $ 5,151 | $ 11,094
Dilutive effect of Convertible Senior Notes |  | 8,274 | 37,736 | 16,897 | 37,736
Convertible Debt | Convertible Senior Notes Due 2017 |  |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Dilutive effect of Convertible Senior Notes | [1] | 178 | 1,798 | 71 | 8,620
Stock Compensation Plan [Member] |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 1,045 | 469 | 1,045 | 730
Convertible Debt Securities [Member] |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 0 | 0 | 1,902 | 0
[1] | 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 EndedSeptember 30, Nine Months EndedSeptember 30,(in thousands)2016 2015 2016 2015Shares of common stock equivalents1,045 469 1,045 730Shares of Convertible Senior Notes due 2017— — 1,902 —
[2] | As applicable, includes coupon interest, amortization of discount and fees, and other changes in income or loss that would result from the assumed conversion.

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- Definition Amount of income (loss) from continuing operations after dilutive effect of adjustments and which are attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests and net of dilutive adjustments. + References No definition available. + Details
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