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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net income	$ 43,136	$ 14,263	$ 64,960	$ 22,786
Less: Net income allocated to preferred shareholder	(14,293)	(6,130)	(23,991)	(9,807)
Less: Net income allocated to unvested restricted stock	(66)	(15)	(82)	(12)
Net income available to common stockholders for basic earnings per common share	28,777	8,118	40,887	12,967
Effect of dilutive securities:
Net income allocated to preferred shareholder	14,293	6,130	23,991	9,807
Interest on 1.25% convertible senior notes due 2032, included in cost of sales	41		204
Net income available to common and preferred stock for diluted earnings per share	$ 43,111	$ 14,248	$ 65,082	$ 22,774
Denominator:
Weighted average basic common shares outstanding (in Shares)	243,171,726	195,746,733	228,749,443	195,427,992
Weighted average additional common shares outstanding if preferred shares converted to common shares (if dilutive) (in Shares)	120,779,819	147,812,786	134,221,626	147,812,786
Total weighted average common shares outstanding if preferred shares converted to common shares (in Shares)	363,951,545	343,559,519	362,971,069	343,240,778
Effect of dilutive securities:
Stock options (in Shares)	7,224,120	5,593,889	7,211,767	5,136,047
1.25% convertible senior notes due 2032 (in Shares)	31,312,850		31,312,850
Weighted average diluted shares outstanding (in Shares)	402,488,515	349,153,408	401,495,686	348,376,825
Income per share:
Basic (in Dollars per share)	$ 0.12	$ 0.04	$ 0.18	$ 0.07
Diluted (in Dollars per share)	$ 0.11	$ 0.04	$ 0.16	$ 0.06