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STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Earnings per share calculations |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | $ 245,234 | $ 164,564 | $ 82,008
Less: Preferred stock dividends and amortization of preferred stock discount | (1,714) | (1,714) | (1,714) | (1,715) | (24,109) | (6,732) | (6,147) | (6,138) | (6,857) | (43,126) | (49,115)
Income available to common stockholders before extraordinary item |  |  |  |  |  |  |  |  |  |  | 32,893
Extraordinary item - impact of desecuritization |  |  |  |  |  |  |  |  |  |  | (5,366)
Basic EPS - income available to common stockholders | 64,492 | 60,718 | 58,811 | 54,356 | 32,240 | 40,219 | 30,201 | 18,778 | 238,377 | 121,438 | 27,527
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |
Restricted stock |  |  |  |  |  |  |  |  | 115 | 15 |
Convertible preferred stock |  |  |  |  |  |  |  |  | 6,857 |  |
Income available to common stockholders before extraordinary item |  |  |  |  |  |  |  |  |  |  | 32,893
Income impact of assumed conversions |  |  |  |  |  |  |  |  |  |  | 2
Extraordinary item - impact of desecuritization |  |  |  |  |  |  |  |  |  |  | (5,366)
Diluted EPS - income available to common stockholders |  |  |  |  |  |  |  |  | $ 245,349 | $ 121,453 | $ 27,529
Number of Shares |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding (in shares) |  |  |  |  |  |  |  |  | 147,093 | 137,478 | 78,770
Effect of dilutive securities on weighted average shares outstanding |  |  |  |  |  |  |  |  |  |  |
Stock options (in shares) |  |  |  |  |  |  |  |  | 62 | 142 | 15
Restricted stock (in shares) |  |  |  |  |  |  |  |  | 718 | 370 | 51
Convertible preferred stock (in shares) |  |  |  |  |  |  |  |  | 5,571 | 8,936 | 5,687
Stock warrants (in shares) |  |  |  |  |  |  |  |  | 23 | 176 |
Total weighted average diluted shares outstanding (in shares) |  |  |  |  |  |  |  |  | 153,467 | 147,102 | 84,523
Per Share Amounts |  |  |  |  |  |  |  |  |  |  |
Basic EPS - Income available to common stockholders before extraordinary item (per share) |  |  |  |  |  |  |  |  |  |  | $ 0.42
Extraordinary item - impact of desecuritization, Basic (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ (0.07)
Basic EPS (in dollars per share) | $ 0.44 | $ 0.41 | $ 0.40 | $ 0.37 | $ 0.22 | $ 0.27 | $ 0.21 | $ 0.17 | $ 1.62 | $ 0.88 | $ 0.35
Diluted EPS - Income available to common stockholders before extraordinary item (per share) |  |  |  |  |  |  |  |  |  |  | $ 0.39
Extraordinary item - impact of desecuritization, Diluted (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ (0.06)
Diluted EPS (in dollars per share) | $ 0.43 | $ 0.41 | $ 0.39 | $ 0.37 | $ 0.22 | $ 0.27 | $ 0.21 | $ 0.13 | $ 1.60 | $ 0.83 | $ 0.33

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