Note 17 - Net Income (Loss) Per Share Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 174,833		$ (33,172)		$ 377,592		$ (220,672)
Net income (loss) after assumed conversion of convertible debt	180,336		(33,172)		388,550		(220,672)
Average common shares outstanding—basic	182,583,000		171,783,000		177,903,000		158,180,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	2,861,000	[1]	0	[1]	2,822,000	[1]	0	[1]
Adjusted shares outstanding—diluted	230,779,000		171,783,000		226,767,000		158,180,000
Basic net income (loss) per share	$ 0.96		$ (0.19)		$ 2.12		$ (1.40)
Diluted net income (loss) per share	$ 0.78		$ (0.19)		$ 1.71		$ (1.40)
Convertible Debt Securities [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6,403,559				6,256,973
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	1,483,800		39,476,796		1,483,800		5,556,916
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	7,599,000	[2]	0	[2]	8,306,000	[2]	0	[2]
Maximum Stock Price Per Share Included In Capped Call Transaction	$ 14.11				$ 14.11
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	$ 5,503	[3]	$ 0	[3]	$ 10,958	[3]	$ 0	[3]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	37,736,000		0		37,736,000		0

[1] For the three and six months ended June 30, 2014, 1,483,800 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 as of such date because they were anti-dilutive. As a result of our net loss for the three and six months ended June 30, 2013, 39,476,796 and 5,556,916 shares, respectively, of our common stock equivalents issued under our stock-based compensation arrangements and convertible debt were not included in the calculation of diluted net loss per share as of such date because they were anti-dilutive.

[2] Does not include the anti-dilutive impact of 6,403,559 and 6,256,973 shares, respectively, for the three and six months ended June 30, 2014 due to capped call transactions related to the Convertible Senior Notes due 2017. Such transactions were designed to offset the potential dilution of the notes up to a stock price of approximately $14.11 per share. See Note 11 of Notes to Consolidated Financial Statements in our 2013 Form 10-K.

[3] As applicable, includes coupon interest, amortization of discount and fees, and other changes in income or loss that would result from the assumed conversion.