Note 10 - Long-Term Debt Schedule of Long Term Debt (Details) (USD $)											6 Months Ended							1 Months Ended	6 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 5.625% Senior Notes due 2013 [Member]	Dec. 31, 2012 5.625% Senior Notes due 2013 [Member]	Jun. 30, 2013 3.00% Convertible Senior Notes due 2017 [Member]		Dec. 31, 2012 3.00% Convertible Senior Notes due 2017 [Member]		Jun. 30, 2013 Nine Percent Notes Due 2017 [Member]	Dec. 31, 2012 Nine Percent Notes Due 2017 [Member]	Jun. 30, 2013 Five Point Three Seven Five Percent Senior Notes due 2015 [Member]	Dec. 31, 2012 Five Point Three Seven Five Percent Senior Notes due 2015 [Member]	Jun. 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]	Jun. 30, 2013 Convertible Debt [Member] 3.00% Convertible Senior Notes due 2017 [Member]	Dec. 31, 2012 Convertible Debt [Member] 3.00% Convertible Senior Notes due 2017 [Member]	Mar. 31, 2013 Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Jun. 30, 2013 Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Jun. 30, 2013 Debt Due 2015 Exchange [Member] Nine Percent Notes Due 2017 [Member]	Jun. 30, 2013 Debt Due 2015 Exchange [Member] Five Point Three Seven Five Percent Senior Notes due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.625%		3.00%				9.00%		5.375%		2.25%							9.00%	5.375%
Gains (Losses) on Extinguishment of Debt											$ (4,000,000)
Long-term debt	913,952,000	663,571,000	0	79,449,000	343,792,000	[1]	334,254,000	[1]	191,148,000	0	54,476,000	249,868,000	324,536,000	[2]	0
Debt Instrument, Face Amount									195,500,000							450,000,000	450,000,000	400,000,000	400,000,000	195,500,000
Extinguishment of Debt, Amount																					195,500,000
Percent of Stock With Ordinary Voting Rights That the Company Must Retain In Order to Make Any Capital Stock Transactions Under Debt Covenant Agreement											80.00%
Proceeds from Issuance of Long-term Debt																		389,800,000
Debt Instrument, Convertible, Conversion Ratio																			94.3396
Debt Conversion, Converted Instrument, Amount																			$ 1,000
Debt Instrument, Convertible, Conversion Price																			$ 10.60

[1] The principal amount of these notes is $450 million.

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