|                                                                       |
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|                                                                       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|                                                                  | For the year ended December 31, |
| Earnings (Loss):                                                      | 2012 |   | 2011 |   | 2010 |   | 2009 |   | 2008 |
| Net income (loss)                                                     | $ | (160,868 | ) |   | $ | (1,764 | ) |   | $ | (12,460 | ) |   | $ | 48,846 |  |   | $ | (5,361 | ) |
| Add:  Fixed Charges                                                   | 9,417 |  |   | 2,007 |  |   | 853 |  |   | 14,885 |  |   | 18,163 |  |
| Add:  Amortization of capitalized interest                            | 7,119 |  |   | 460 |  |   | 178 |  |   | 973 |  |   | 176 |  |
| Less:  Interest capitalized                                           | (1,946) |  |   | (818) |  |   | (633) |  |   | (10,802) |  |   | (12,225) |  |
| Net income (loss), as adjusted                                        | $ | (146,278 | ) |   | $ | (115 | ) |   | $ | (12,062 | ) |   | $ | 53,902 |  |   | $ | 753 |  |
|                                                                  |   |   |   |   |   |   |   |   |   |
| Fixed Charges:                                                        |   |   |   |   |   |   |   |   |   |
| Total interest expensed                                               | $ | 1,992 |  |   | $ | 682 |  |   | $ | 500 |  |   | $ | 12,831 |  |   | $ | 16,080 |  |
| Amortization of financing costs                                       | 224 |  |   | 248 |  |   | 283 |  |   | 1,964 |  |   | 1,998 |  |
| Estimated interest portion of operating leases                        | 124 |  |   | 53 |  |   | 70 |  |   | 90 |  |   | 85 |  |
| Dividends on preferred stock attributable to non-controlling interest | 7,077 |  |   | 1,024 |  |   | — |  |   | — |  |   | — |  |
| Total fixed charges                                                   | $ | 9,417 |  |   | $ | 2,007 |  |   | $ | 853 |  |   | $ | 14,885 |  |   | $ | 18,163 |  |
|                                                                  |   |   |   |   |   |   |   |   |   |
| Fixed Charges and Fixed Charge Ratio:                                 |   |   |   |   |   |   |   |   |   |
| Deficiency to fixed charges                                           | $ | (155,695 | ) |   | $ | (2,122 | ) |   | $ | (12,915 | ) |   | — |  |   | $ | (17,410 | ) |
| Earnings to fixed charges                                             | — |  |   | — |  |   | — |  |   | 3.6 |  |   | — |  |

|                                                                       |
|-----------------------------------------------------------------------|
|                                                                       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|                                                                  | For the year ended December 31, |
| Earnings (Loss):                                                      | 2012 |   | 2011 |   | 2010 |   | 2009 |   | 2008 |
| Net income (loss)                                                     | $ | (159,399 | ) |   | $ | (739 | ) |   | $ | (11,548 | ) |   | $ | 53,607 |  |   | $ | (432 | ) |
| Add:  Fixed Charges                                                   | 9,418 |  |   | 2,006 |  |   | 800 |  |   | 11,623 |  |   | 14,368 |  |
| Add:  Amortization of capitalized interest                            | 7,119 |  |   | 460 |  |   | 178 |  |   | 973 |  |   | 176 |  |
| Less:  Interest capitalized                                           | (1,946) |  |   | (817) |  |   | (633) |  |   | (10,802) |  |   | (12,224) |  |
| Net income (loss), as adjusted                                        | $ | (144,808 | ) |   | $ | 910 |  |   | $ | (11,203 | ) |   | $ | 55,401 |  |   | $ | 1,888 |  |
|                                                                  |   |   |   |   |   |   |   |   |   |
| Fixed Charges:                                                        |   |   |   |   |   |   |   |   |   |
| Total interest expensed                                               | $ | 1,993 |  |   | $ | 681 |  |   | $ | 483 |  |   | $ | 10,240 |  |   | $ | 12,823 |  |
| Amortization of financing costs                                       | 224 |  |   | 248 |  |   | 247 |  |   | 1,293 |  |   | 1,460 |  |
| Estimated interest portion of operating leases                        | 124 |  |   | 53 |  |   | 70 |  |   | 90 |  |   | 85 |  |
| Dividends on preferred stock attributable to non-controlling interest | 7,077 |  |   | 1,024 |  |   | — |  |   | — |  |   | — |  |
| Total fixed charges                                                   | $ | 9,418 |  |   | $ | 2,006 |  |   | $ | 800 |  |   | $ | 11,623 |  |   | $ | 14,368 |  |
|                                                                  |   |   |   |   |   |   |   |   |   |
| Fixed Charges and Fixed Charge Ratio:                                 |   |   |   |   |   |   |   |   |   |
| Deficiency to fixed charges                                           | $ | (154,226 | ) |   | $ | (1,096 | ) |   | $ | (12,003 | ) |   | — |  |   | $ | (12,480 | ) |
| Earnings to fixed charges                                             | — |  |   | — |  |   | — |  |   | 4.8 |  |   | — |  |