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Equity (Tables) | 3 Months Ended
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Mar. 31, 2013
Equity [Abstract] |
Preferred Stock | Preferred Stock The following table presents information regarding the Company’s preferred stock (in thousands):
| March 31, 2013 |  | December 31, 2012
Shares authorized | 50,000 |  |  | 50,000 |
Shares outstanding at end of period |  |  |
8.5% Convertible perpetual preferred stock | 2,650 |  |  | 2,650 |
6.0% Convertible perpetual preferred stock | 2,000 |  |  | 2,000 |
7.0% Convertible perpetual preferred stock | 3,000 |  |  | 3,000 |
Preferred Stock Dividends | Paid and unpaid dividends included in the calculation of loss applicable to the Company’s common stockholders and the Company’s basic loss per share calculation for the three-month periods ended March 31, 2013 and 2012 as presented in the accompanying unaudited condensed consolidated statements of operations, are included in table below (in thousands):
| Three Months Ended March 31,
| 2013 |  | 2012
| Dividends Paid |  | Dividends Unpaid |  | Total |  | Dividends Paid |  | Dividends Unpaid |  | Total
8.5% Convertible perpetual preferred stock | $ | 2,815 |  |  | $ | 2,816 |  |  | $ | 5,631 |  |  | $ | 2,815 |  |  | $ | 2,816 |  |  | $ | 5,631 |
6.0% Convertible perpetual preferred stock | 500 |  |  | 2,500 |  |  | 3,000 |  |  | 500 |  |  | 2,500 |  |  | 3,000 |
7.0% Convertible perpetual preferred stock | — |  |  | 5,250 |  |  | 5,250 |  |  | — |  |  | 5,250 |  |  | 5,250 |
Total | $ | 3,315 |  |  | $ | 10,566 |  |  | $ | 13,881 |  |  | $ | 3,315 |  |  | $ | 10,566 |  |  | $ | 13,881 |
Common Stock | Common Stock The following table presents information regarding the Company’s common stock (in thousands):
| March 31, 2013 |  | December 31, 2012
Shares authorized | 800,000 |  |  | 800,000 |
Shares outstanding at end of period | 493,327 |  |  | 490,359 |
Shares held in treasury | 1,278 |  |  | 1,219 |

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- Details
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