Note 4 - Earnings (Loss) Per Share (Details) - Earnings (Loss) Per Share - Basic and Diluted Loss Per Share (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Numerator
Net income (loss)	$ 314,385	$ 62,699	$ (98,390)
Less: distributed earnings allocated to participating securities		(1,101)	(711)
Less: undistributed earnings allocated to participating securities	(4,917)
Net income (loss) attributable to common stockholders (numerator for basic earnings per share)	309,468	61,598	(99,101)
Add back: undistributed earnings allocated to participating securities	4,917
Less: undistributed earnings reallocated to participating securities	(4,879)
Numerator for diluted EPS under two class method	$ 309,506	$ 61,598	$ (99,101)
Denominator
Weighted-average common shares outstanding (in Shares)	48,453,119	47,660,629	46,796,334
Denominator for diluted EPS under two class method (in Shares)	48,831,785	47,834,156	46,796,334
Basic Earnings Per Common Share (in Dollars per share)	$ 6.39	$ 1.29	$ (2.12)
Diluted Earnings Per Common Share (in Dollars per share)	$ 6.34	$ 1.29	$ (2.12)
Employee Stock Option [Member]
Denominator
Add: dilutive effect of stock options (in Shares)	378,666	173,527