Note 4 - Earnings Per Common Share (Details) - Components Used in Computation of Basic and Diluted Earnings Per Common Share (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income	$ 58,935	$ 21,710	$ 123,895	$ 44,496
Less: Net income allocated to preferred shareholder	(14,166)	(9,100)	(40,353)	(18,980)
Less: Net income allocated to unvested restricted stock	(90)	(22)	(169)	(31)
Net income available to common stockholders for basic earnings per common share	44,679	12,588	83,373	25,485
Effect of dilutive securities:
Net income allocated to preferred shareholder	14,166	9,100	40,353	18,980
Net income available to common and preferred stock for diluted earnings per share	58,886	21,960	124,216	44,520
Denominator:
Weighted average basic common shares outstanding (in Shares)	276,966,995	204,485,294	244,998,581	198,469,130
Weighted average additional common shares outstanding if preferred shares converted to common shares (if dilutive) (in Shares)	87,812,786	147,812,786	118,582,017	147,812,786
Total weighted average common shares outstanding if preferred shares converted to common shares (in Shares)	364,779,781	352,298,080	363,580,598	346,281,916
Effect of dilutive securities:
Stock options (in Shares)	6,617,253	7,333,726	6,878,447	5,687,376
Weighted average diluted shares outstanding (in Shares)	402,709,884	383,086,434	401,771,895	358,254,718
Income per share:
Basic (in Dollars per share)	$ 0.16	$ 0.06	$ 0.34	$ 0.13
Diluted (in Dollars per share)	$ 0.15	$ 0.05	$ 0.31	$ 0.12
1.25% Convertible Senior Notes Due August 2032 [Member]
Effect of dilutive securities:
Interest on convertible debt	41	55	490	55
Effect of dilutive securities:
Effect of dilutive securities, convertible debt (in Shares)	31,312,850	18,719,639	31,312,850	6,285,426
6% Convertible Senior Subordinated Notes Due 2012 [Member]
Effect of dilutive securities:
Interest on convertible debt		$ 217
Effect of dilutive securities:
Effect of dilutive securities, convertible debt (in Shares)		4,734,989