Exhibit 12
RATIO OF EARNINGS TO FIXED CHARGES
The following table sets forth our ratio of earnings to fixed charges for the periods indicated (dollars in thousands):
| Year ended December 31, | |||||||||||||||||||
| 2015 | 2014 | 2013 | 2012 | 2011 | |||||||||||||||
| Fixed Charges: | |||||||||||||||||||
| Interest expense | $ | 43,446 | $ | 45,806 | $ | 39,152 | $ | 26,060 | $ | 32,724 | |||||||||
| Capitalized interest | 3,098 | 1,710 | 2,694 | 2,663 | 2,175 | ||||||||||||||
| Amortization of public offering costs | 2,257 | 1,740 | 2,143 | 1,146 | 2,050 | ||||||||||||||
| Portion of rent expense representative of interest | 3,998 | 3,303 | 4,864 | 3,986 | 4,028 | ||||||||||||||
| Total fixed charges | $ | 52,799 | $ | 52,559 | $ | 48,853 | $ | 33,855 | $ | 40,977 | |||||||||
| Earnings available for fixed charges: | |||||||||||||||||||
| Net income (loss) from continuing operations before income taxes | $ | (393,446 | ) | $ | (1,615,128 | ) | $ | (808,679 | ) | $ | 119,484 | $ | 208,245 | ||||||
| Fixed charges above | 52,799 | 52,559 | 48,853 | 33,855 | 40,977 | ||||||||||||||
| Less interest capitalized | (3,098 | ) | (1,710 | ) | (2,694 | ) | (2,663 | ) | (2,175 | ) | |||||||||
| Current period amortization of capitalized interest | 3,492 | 4,895 | 6,899 | 5,725 | 6,427 | ||||||||||||||
| Total earnings available for fixed charges | (340,253 | ) | (1,559,384 | ) | (755,621 | ) | 156,401 | 253,474 | |||||||||||
| Earnings sufficient (insufficient) to cover fixed charges | $ | (393,052 | ) | $ | (1,611,943 | ) | $ | (804,474 | ) | $ | 122,546 | $ | 212,497 | ||||||
| Ratio of earnings to fixed charges | N/A | N/A | N/A | 4.62x | 6.18x | ||||||||||||||
N/A - represents coverage ratio of less than 1.