Note 11 - Long-Term Debt Schedule of Long Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Senior Notes Due 2013	Dec. 31, 2012 Senior Notes Due 2013	Dec. 31, 2013 Senior Notes Due 2015	Dec. 31, 2012 Senior Notes Due 2015	Dec. 31, 2013 Convertible Senior Notes Due 2017		Dec. 31, 2012 Convertible Senior Notes Due 2017		Dec. 31, 2013 Convertible Senior Notes Due 2019		Dec. 31, 2012 Convertible Senior Notes Due 2019		Dec. 31, 2013 Senior Notes Due 2017	Dec. 31, 2012 Senior Notes Due 2017	Dec. 31, 2013 Total Long Term Debt	Dec. 31, 2012 Total Long Term Debt	Dec. 31, 2013 Convertible Debt [Member] Convertible Senior Notes Due 2017	Dec. 31, 2012 Convertible Debt [Member] Convertible Senior Notes Due 2017	Nov. 15, 2010 Convertible Debt [Member] Convertible Senior Notes Due 2017	Dec. 31, 2013 Convertible Debt [Member] Convertible Senior Notes Due 2019	Dec. 31, 2013 Debt Due 2015 Exchange Senior Notes Due 2015	Dec. 31, 2013 Debt Due 2015 Exchange Senior Notes Due 2017	Dec. 31, 2013 Debt Offering 2013 [Member] Convertible Debt [Member] Convertible Senior Notes Due 2019	Mar. 31, 2013 Debt Offering 2013 [Member] Convertible Debt [Member] Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.625%		5.375%		3.00%				2.25%				9.00%						3.00%		5.375%	9.00%	2.25%	2.25%
Long-term debt	$ 930,072	$ 663,571	$ 0	$ 79,449	$ 54,481	$ 249,868	$ 353,798	[1]	$ 334,254	[1]	$ 330,182	[2]	$ 0	[2]	$ 191,611	$ 0	$ 930,072	$ 663,571	$ 353,798	$ 334,254		$ 330,182
Long-term Debt, Gross																			$ 450,000	$ 450,000		$ 400,000				$ 400,000

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

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