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
	Mar. 31, 2014	Mar. 31, 2013
Numerator:
Net income	$ 38,159	$ 21,824
Less: Net income allocated to preferred shareholder	(9,147)	(8,903)
Less: Net income allocated to unvested restricted stock	(59)	(22)
Net income available to common stockholders for basic earnings per common share	28,953	12,899
Effect of dilutive securities:
Net income allocated to preferred shareholder	9,147	8,903
Net income available to common and preferred stock for diluted earnings per share	38,141	21,843
Denominator:
Weighted average basic common shares outstanding (in Shares)	277,948,342	214,166,912
Weighted average additional common shares outstanding if preferred shares converted to common shares (if dilutive (in Shares)	87,812,786	147,812,786
Total weighted average common shares outstanding if preferred shares converted to common shares (in Shares)	365,761,128	361,979,698
Effect of dilutive securities:
Stock options and stock appreciation rights (in Shares)	6,633,777	7,467,654
Weighted average diluted shares outstanding (in Shares)	403,707,755	400,760,202
Income per common share:
Basic (in Dollars per share)	$ 0.10	$ 0.06
Diluted (in Dollars per share)	$ 0.09	$ 0.05
1.25% Convertible Senior Notes Due August 2032 [Member]
Effect of dilutive securities:
Interest on 1¼% convertible senior notes due 2032, included in cost of sales	$ 41	$ 41
Effect of dilutive securities:
1¼% convertible senior notes due 2032 (in Shares)	31,312,850	31,312,850