Note 10 - Long-Term Debt Schedule of Long Term Debt (Details) (USD $)					1 Months Ended	3 Months Ended						1 Months Ended							1 Months Ended	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 5.625% Senior Notes due 2013 [Member]	Dec. 31, 2012 5.625% Senior Notes due 2013 [Member]	Jan. 31, 2013 5.375% Senior Notes due 2015 [Member]	Mar. 31, 2013 5.375% Senior Notes due 2015 [Member]	Dec. 31, 2012 5.375% Senior Notes due 2015 [Member]	Mar. 31, 2013 3.00% Convertible Senior Notes due 2017 [Member]		Dec. 31, 2012 3.00% Convertible Senior Notes due 2017 [Member]		Jan. 31, 2013 Nine Percent Notes Due 2017 [Member]	Mar. 31, 2013 Nine Percent Notes Due 2017 [Member]	Dec. 31, 2012 Nine Percent Notes Due 2017 [Member]	Mar. 31, 2013 Two Point Two Five Percent Convertible Notes Due 2019 [Member]		Dec. 31, 2012 Two Point Two Five Percent Convertible Notes Due 2019 [Member]	Mar. 31, 2013 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]	Mar. 31, 2013 Convertible Debt [Member] Two Point Two Five Percent Convertible Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.625%			5.375%		3.00%					9.00%		2.25%
Gains (Losses) on Extinguishment of Debt						$ 3,900,000
Long-term debt	906,105,000	663,571,000	0	79,449,000		54,798,000	249,868,000	338,966,000	[1]	334,254,000	[1]		190,563,000	0	321,778,000	[2]	0
Debt Instrument, Face Amount										450,000,000								450,000,000	400,000,000	400,000,000
Extinguishment of Debt, Amount					195,200,000
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 Instrument, Convertible, Conversion Price																			$ 10.60	$ 10.60
Debt Instrument, Increase, Additional Borrowings												$ 195,200,000							$ 400,000,000

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

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