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STOCKHOLDERS' EQUITY (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011
STOCKHOLDERS' EQUITY |  |  |  |  |  |  |
Common stock, shares outstanding | 142,645,812 |  |  | 142,645,812 |  |  | 149,327,907
Earnings per share calculations |  |  |  |  |  |  |
Net income | $ 70,557 |  | $ 60,525 | $ 138,640 |  | $ 116,596 |
Less: Preferred stock dividends | (1,714) |  | (1,714) | (3,428) |  | (3,429) |
Less: Earnings allocated to participating securities | (859) |  |  | (1,718) |  |  |
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period) and participating securities. | 67,984 | [1] | 58,811 | 133,494 | [1] | 113,167 |
Effect of dilutive securities |  |  |  |  |  |  |
Restricted stock awards | 7 |  | 35 | 15 |  | 41 |
Convertible preferred stock | 1,714 |  | 1,714 | 3,428 |  | 3,429 |
Diluted EPS - income available to common stockholders | $ 69,705 | [1] | $ 60,560 | $ 136,937 | [1] | $ 116,637 |
Number of Shares |  |  |  |  |  |  |
Weighted average shares outstanding | 142,107,000 | [1] | 147,011,000 | 143,727,000 | [1] | 146,937,000 |
Effect of dilutive securities on weighted average shares outstanding |  |  |  |  |  |  |
Stock options (in shares) | 36,000 |  | 73,000 | 41,000 |  | 96,000 |
Restricted stock awards (in shares) | 72,000 |  | 692,000 | 75,000 |  | 685,000 |
Convertible preferred stock (in shares) | 5,571,000 |  | 5,571,000 | 5,571,000 |  | 5,571,000 |
Stock warrants (in shares) |  |  |  |  |  | 60,000 |
Total weighted average diluted shares outstanding | 147,786,000 | [1] | 153,347,000 | 149,414,000 | [1] | 153,349,000 |
Per Share Amounts |  |  |  |  |  |  |
Basic EPS (in dollars per share) | $ 0.48 | [1] | $ 0.40 | $ 0.93 | [1] | $ 0.77 |
Diluted EPS - Income available to common stockholders (in dollars per share) | $ 0.47 | [1] | $ 0.39 | $ 0.92 | [1] | $ 0.76 |
[1] | On April 1, 2012, the Company revised its calculation of earnings per share to account for participating securities under the two-class method. This revision to the earnings per share calculation does not have an impact to previous periods as the amounts are immaterial.

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