Note 10 - Long-Term Debt Schedule of Long Term Debt (Details) - USD ($) $ in Thousands, shares in Millions		1 Months Ended	3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt		$ 1,224,892	$ 1,224,892		$ 1,224,892		$ 1,192,299
Loss on Repurchase of Debt Instrument			$ 91,876	$ 0	$ 91,876	$ 0
Senior Notes Due 2017
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.00%	9.00%		9.00%
Long-term debt		$ 191,256	$ 191,256		$ 191,256		190,245
Convertible Senior Notes Due 2017
Debt Instrument [Line Items]
Debt Issuance Cost	[1]	$ (451)	$ (451)		$ (451)		(3,974)
Debt Instrument, Interest Rate, Stated Percentage		3.00%	3.00%		3.00%
Long-term debt		$ 51,917	$ 51,917		$ 51,917		371,336
Long-term debt, Gross		60,914	60,914		60,914		450,000
Extinguishment of Debt, Amount			389,100
Payments of Debt Extinguishment Costs			$ 126,800
Debt Conversion, Converted Instrument, Shares Issued			28.4
Loss on Repurchase of Debt Instrument			$ 91,876
Induced Conversion of Convertible Debt Expense			35,500
Losses on Extinguishment of Debt			52,300
Write off of Deferred Debt Issuance Cost			4,100
Convertible Debt, Termination of Capped Call Transaction, Total Consideration			$ 54,900
Convertible Debt, Termination of Capped Call Transaction, Number of Shares Received			2.3
Convertible Debt, Termination of Capped Call Transaction, Total Cash Received			$ 12,000
Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Debt Issuance Cost	[1]	$ (5,219)	$ (5,219)		$ (5,219)		(5,878)
Debt Instrument, Interest Rate, Stated Percentage		2.25%	2.25%		2.25%
Long-term debt		$ 342,980	$ 342,980		$ 342,980		336,133
Long-term debt, Gross		$ 399,992	$ 399,992		$ 399,992		400,000
Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.50%	5.50%		5.50%
Long-term debt		$ 295,198	$ 295,198		$ 295,198		294,585
Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.25%	5.25%		5.25%
Long-term debt		$ 343,541	$ 343,541		$ 343,541		0
Long-term debt, Gross		350,000	$ 350,000		$ 350,000
Proceeds from Issuance of Long-term Debt		$ 344,300
Debt Instrument, Redemption Price, Percentage		100.00%
Debt Instrument, Basis Spread on Variable Rate		0.50%
Percent of Stock With Ordinary Voting Rights That Company Must Retain In Order To Make Any Capital Stock Transactions Under Debt Covenant Agreement		80.00%	80.00%		80.00%
Total Long Term Debt [Member]
Debt Instrument [Line Items]
Long-term debt		$ 1,224,892	$ 1,224,892		$ 1,224,892
New Accounting Pronouncement, Early Adoption, Effect [Member]
Debt Instrument [Line Items]
Debt Issuance Cost							(17,627)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Senior Notes Due 2017
Debt Instrument [Line Items]
Debt Issuance Cost							(2,360)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Convertible Senior Notes Due 2017
Debt Instrument [Line Items]
Debt Issuance Cost							(3,974)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Debt Issuance Cost							(5,878)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Issuance Cost							(5,415)
Scenario, Previously Reported [Member]
Debt Instrument [Line Items]
Long-term debt							1,209,926
Scenario, Previously Reported [Member] | Senior Notes Due 2017
Debt Instrument [Line Items]
Long-term debt							192,605
Scenario, Previously Reported [Member] | Convertible Senior Notes Due 2017
Debt Instrument [Line Items]
Long-term debt							375,310
Scenario, Previously Reported [Member] | Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Long-term debt							342,011
Scenario, Previously Reported [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt							$ 300,000

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