Note 10 - Long-Term Debt Schedule of Long Term Debt (Details) (USD $)					9 Months Ended													9 Months Ended			1 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Five Point Six Two Five Percent Senior Notes due 2013 [Member]	Dec. 31, 2012 Five Point Six Two Five Percent Senior Notes due 2013 [Member]	Sep. 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]	Sep. 30, 2013 Nine Percent Notes Due 2017 [Member]	Dec. 31, 2012 Nine Percent Notes Due 2017 [Member]	Sep. 30, 2013 Three Percent Convertible Senior Notes due 2017 [Member]		Dec. 31, 2012 Three Percent Convertible Senior Notes due 2017 [Member]		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] Three Percent Convertible Senior Notes due 2017 [Member]	Dec. 31, 2012 Convertible Debt [Member] Three Percent Convertible Senior Notes due 2017 [Member]	Sep. 30, 2013 Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Sep. 30, 2013 Debt Exchange 2013 [Member] Five Point Three Seven Five Percent Senior Notes due 2015 [Member]	Sep. 30, 2013 Debt Exchange 2013 [Member] Nine Percent Notes Due 2017 [Member]	Mar. 31, 2013 Debt Offering 2013 [Member] Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Sep. 30, 2013 Debt Offering 2013 [Member] Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Sep. 30, 2013 Redemption Trigger based on Company Stock Price [Member] Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member] D	Sep. 30, 2013 Conversion Trigger based on Company Stock Price [Member] Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member] D	Sep. 30, 2013 Conversion Trigger based on Trading Price of Debt Versus Company Stock Price [Member] Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member] D
Debt Instrument [Line Items]
Long-term Debt, Gross																$ 450,000,000		$ 400,000,000		$ 195,500,000	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage			5.625%		5.375%		9.00%		3.00%				2.25%						5.375%	9.00%		2.25%
Gains (Losses) on Extinguishment of Debt					(4,000,000)
Long-term debt	921,927,000	663,571,000	0	79,449,000	54,479,000	249,868,000	191,376,000	0	348,735,000	[1]	334,254,000	[1]	327,337,000	[2]	0			327,337,000
Debt Instrument, Face Amount																	450,000,000
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, Threshold Trading Days																							20	20	5
Debt Instrument, Convertible, Threshold Consecutive Trading Days																							30 days	30 days	5 days
Convertible Debt Trigger Based on Common Stock Price																							130.00%	130.00%
Debt Instrument, Convertible, Redemption Price, Percentage																							100.00%
Convertible Debt Trigger Based on Trading Price Per Share of Debt																									98.00%
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.