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Note 8 - Earnings Per Share (Details) - 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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Computation of Basic and Diluted Earnings Per Common Share [Abstract]        
Net income available to common stockholders (in Dollars) $ 5,347 $ 18,156 $ 11,621 $ 32,206
Weighted average number of common shares outstanding 43,352,836 43,334,441 43,348,195 43,132,398
Effect of stock options and other awards 197,293 27,114 123,685 24,429
Weighted average diluted number of common shares outstanding 43,550,129 43,361,555 43,471,880 43,156,827
Basic earnings per share (in Dollars per share) $ 0.12 $ 0.42 $ 0.27 $ 0.75
Diluted earnings per share (in Dollars per share) $ 0.12 $ 0.42 $ 0.27 $ 0.75