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
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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

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