Note 13 - Long-Term Debt Schedule of Liability and Equity Components of Convertible Debt (Details) (USD $)	81 Months Ended							12 Months Ended	81 Months Ended
	Aug. 16, 2017 Convertible Debt [Member]	Nov. 01, 2010 Convertible Debt [Member]	Dec. 31, 2011 3.00% Convertible Senior Notes due 2017 [Member]		Dec. 31, 2010 3.00% Convertible Senior Notes due 2017 [Member]		Nov. 01, 2010 3.00% Convertible Senior Notes due 2017 [Member]	Dec. 31, 2011 3.00% Convertible Senior Notes due 2017 [Member] Convertible Debt [Member]	Aug. 16, 2017 3.00% Convertible Senior Notes due 2017 [Member] Convertible Debt [Member]
Schedule of Liability and Equity Components of Convertible Debt [Line Items]
Principal amount of convertible debt in liabilities			$ 450,000,000		$ 450,000,000		$ 450,000,000
Less: debt discount, net (1)			(133,502,000)	[1]	(149,633,000)	[1]
Net carrying amount of convertible debt in liabilities			316,498,000		300,367,000
Equity component (net of tax impact) (2)			65,679,000	[2]	65,701,000	[2]
Debt Instrument, Convertible, Conversion Ratio	85.5688
Debt Instrument, Convertible, Conversion Price	$ 11.69
Maximum Stock Price Per Share Included In Capped Call Transaction	$ 14.11
Cash Paid To Purchase Capped Call Transactions		46,100,000
Convertible Debt Trigger Based on Common Stock Price								130.00%
Debt Conversion, Converted Instrument, Amount									$ 1,000
Convertible Debt Trigger Based on Trading Price Per Share of Debt								98.00%

[1] Included within long-term debt and is being amortized over the life of the convertible notes.

[2] Included within additional paid-in capital, net of capped call transactions and related issuance costs.