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Equity (Tables) | 3 Months Ended
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Mar. 31, 2014
Equity [Abstract] |
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, 2014 and 2013 as presented in the accompanying unaudited condensed consolidated statements of operations, are included in the tables below (in thousands):
| Three Months Ended March 31,
| 2014 |  | 2013
| 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 |
Treasury Stock | The following table shows the number of shares withheld for taxes and the associated value of those shares for the three-month periods ended March 31, 2014 and 2013. These shares were accounted for as treasury stock when withheld and then immediately retired.
| Three Months Ended March 31,
| 2014 |  | 2013
| (In thousands)
Number of shares withheld for taxes | 609 |  |  | 1,778 |
Value of shares withheld for taxes | $ | 3,677 |  |  | $ | 11,216 |

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