Note 10 - Long-Term Debt Schedule of Liability and Equity Components of Convertible Debt (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Two Point Two Five Percent Convertible Notes Due 2019 [Member]		Dec. 31, 2012 Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Sep. 30, 2013 Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]		Mar. 31, 2013 Debt Offering 2013 [Member] Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]
Schedule of Liability and Equity Components of Convertible Debt [Line Items]
Long-term Debt, Gross						$ 400,000,000		$ 400,000,000
Debt Instrument, Unamortized Discount (Premium), Net						(72,663,000)	[1]
Long-term debt	921,927,000	663,571,000	327,337,000	[2]	0	327,337,000
Debt Instrument, Convertible, Carrying Amount of Equity Component						$ 77,026,000	[3],[4]

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

[2] The principal amount of these notes is $400 million.

[3] A full valuation allowance has been recorded against the deferred income tax impact.

[4] Included within additional paid-in capital, net of related issuance costs.