v2.4.0.6
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND NATURE OF BUSINESS (Details 3) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Basic Earning per share                      
Net income                 $ 120,561 $ 57,757 $ 42,678
Weighted average common shares - Basic                 34,502 34,086 33,825
Total basic earnings per common share (in dollars per share) $ 0.93 $ 1.13 $ 0.39 $ 1.02 $ (0.10) $ 0.99 $ 0.42 $ 0.35 $ 3.47 $ 1.66 $ 1.22
Restricted stock units participating securities
                      
Basic Earning per share                      
Net income                 721 1,216 1,294
Common Stock
                      
Basic Earning per share                      
Net income                 $ 119,840 $ 56,541 $ 41,384
Weighted average common shares - Basic                 34,502 34,086 33,825
Total basic earnings per common share (in dollars per share)                 $ 3.47 $ 1.66 $ 1.22