Note 16 - Net Income (Loss) Per Share Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss) from continuing operations—basic	$ 91,727		$ 145,980
Income (Loss) From Continuing Operations, Diluted, Amount	95,400		151,435
Income from discontinued operations, net of tax	530		56,779
Net income-basic	92,257		202,759
Net income (loss) after assumed conversion of convertible debt	95,930		208,214
Average common shares outstanding—basic	191,224,000		173,165,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	3,202,000	[1]	2,764,000	[1]
Adjusted shares outstanding—diluted	243,048,000		222,668,000
Net income from continuing operations	$ 0.48		$ 0.84
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00		$ 0.33
Basic net income per share	$ 0.48		$ 1.17
Net income from continuing operations	$ 0.39		$ 0.68
Income from discontinued operations	$ 0.00		$ 0.26
Diluted net income (loss) per share	$ 0.39		$ 0.94
Stock Compensation Plan [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	540,400		946,400
Convertible Debt [Member] | Convertible Senior Notes Due 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	10,886,000		9,003,000
Convertible Debt [Member] | Convertible Senior Notes Due 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Adjustment for interest expense incurred on assumed conversion of convertible debt, net	$ 3,673	[2]	$ 5,455	[2]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	37,736,000		37,736,000

[1] For the three months ended March 31, 2015, 540,400 shares of our common stock equivalents issued under our stock-based compensation arrangements were not included in the calculation of diluted net income per share because they were anti-dilutive. For the three months ended March 31, 2014, 946,400 shares of our common stock equivalents issued under our stock-based compensation arrangements were not included in the calculation of diluted net income per share because they were anti-dilutive.

[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.