Note 13 - Long-Term Debt Schedule of Long Term Debt (Details) (USD $)	12 Months Ended				2 Months Ended	6 Months Ended	12 Months Ended				12 Months Ended						1 Months Ended				0 Months Ended	12 Months Ended					1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2010 7.75% Debentures due 2011 [Member]	Feb. 23, 2012 5.625% Senior Notes due 2013 [Member]	Sep. 30, 2012 5.625% Senior Notes due 2013 [Member]	Dec. 31, 2012 5.625% Senior Notes due 2013 [Member]	Dec. 31, 2011 5.625% Senior Notes due 2013 [Member]	Jan. 31, 2008 5.625% Senior Notes due 2013 [Member]	Feb. 01, 2003 5.625% Senior Notes due 2013 [Member]	Dec. 15, 2012 5.375% Senior Notes due 2015 [Member]	Dec. 31, 2012 5.375% Senior Notes due 2015 [Member]	Dec. 03, 2012 5.375% Senior Notes due 2015 [Member]	Dec. 31, 2011 5.375% Senior Notes due 2015 [Member]	Jun. 01, 2005 5.375% Senior Notes due 2015 [Member]	Dec. 31, 2012 Non-Convertible Debt [Member]	Nov. 30, 2010 3.00% Convertible Senior Notes due 2017 [Member]	Dec. 31, 2012 3.00% Convertible Senior Notes due 2017 [Member]	Dec. 31, 2011 3.00% Convertible Senior Notes due 2017 [Member]	Nov. 15, 2010 3.00% Convertible Senior Notes due 2017 [Member]	Jan. 04, 2013 9.00% Senior Notes due 2017 [Member]	Dec. 14, 2012 9.00% Senior Notes due 2017 [Member]	Dec. 31, 2012 9.00% Senior Notes due 2017 [Member]	Dec. 03, 2012 9.00% Senior Notes due 2017 [Member]	Dec. 31, 2012 Total Long Term Debt [Member]	Dec. 31, 2011 Total Long Term Debt [Member]	Feb. 15, 2013 Long-term Debt [Member] 5.625% Senior Notes due 2013 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 663,571,000	$ 818,584,000						$ 252,267,000				$ 249,868,000		$ 249,819,000				$ 334,254,000	$ 316,498,000						$ 663,571,000	$ 818,584,000
Debt Instrument, Interest Rate, Stated Percentage				7.75%			5.625%			5.625%					5.375%					3.00%				9.00%
Debt Instrument, Offering Date																							Dec. 03, 2012
Debt Instrument, Maturity Date												Jun. 15, 2015											Jun. 15, 2017
Principal Amount of Notes Used in Calculation of Debt Exchange													1,000
Debt Instrument, Exchange, Early Participation Cutoff Date																						Dec. 14, 2012
Debt Instrument, Exchange Offer, Last Payment Date											Dec. 15, 2012
Debt Conversion, Converted Instrument, Issuance Date																							Dec. 31, 2012
Debt Conversion, Converted Instrument, Expiration or Due Date																					Jan. 04, 2013
Debt Issuance Cost Per Principal Amount of Notes													25.00
Other Long Term Debt Details [Abstract]
Debt Instrument, Face Amount										250,000,000					250,000,000			450,000,000	450,000,000	450,000,000
Extinguishment of Debt, Amount					146,500,000	24,100,000	170,600,000																				79,400,000
Gains (Losses) on Extinguishment of Debt					15,200,000	1,000,000
Debt Instrument, Unamortized Premium									11,500,000
Price Per Principal Amount Tendered for Repurchase of Long Term Debt Through Modified Dutch Auction Tender Offer					900
Principal Amount of Note Used as Basis for Determining Tender Cap Range of Purchase					1,000
Percent of Principal Amount of Notes Purchased in Modified Dutch Auction Tender Offer for Long Term Debt					59.00%
Proceeds from Issuance of Debt	$ 0	$ 0	$ 391,310,000														$ 391,300,000
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%