Note 12 - Long-Term Debt Schedule of Liability and Equity Components of Convertible Debt (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt		$ 1,069,537	$ 1,219,454
Convertible Senior Notes Due 2017
Debt Instrument [Line Items]
Long-term debt		20,947	46,115
Convertible Senior Notes Due 2017 | Convertible Debt [Member]
Debt Instrument [Line Items]
Principal amount of convertible debt in liabilities		22,233	52,370
Less: debt discount, net (1)	[1]	(1,221)	(5,941)
Unamortized Debt Issuance Expense	[1]	(65)	(314)
Long-term debt		20,947	46,115
Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Long-term debt		62,013	341,214
Convertible Senior Notes Due 2019 | Convertible Debt [Member]
Debt Instrument [Line Items]
Principal amount of convertible debt in liabilities		68,024	389,992
Less: debt discount, net (1)	[1]	(5,461)	(44,313)
Unamortized Debt Issuance Expense	[1]	(550)	(4,465)
Long-term debt		$ 62,013	$ 341,214

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