Exhibit 12.1
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(Dollars in millions, except ratio amounts)
| Year Ended December 31, | ||||||||||||||||||
| 2016 | 2015 Adjusted | 2014 Adjusted | 2013 | 2012 | 2011 | |||||||||||||
| Income (loss) before income taxes | $ | (142.0 | ) | $ | (71.7 | ) | $ | 68.7 | $ | 127.6 | $ | 234.3 | $ | 252.3 | ||||
| Plus: | ||||||||||||||||||
| Fixed charges | 13.4 | 5.5 | 8.9 | 12.0 | 5.8 | 3.0 | ||||||||||||
| Amortization of capitalized interest | 1.9 | 1.7 | 0.7 | 0.6 | 0.6 | 0.6 | ||||||||||||
| Less: | ||||||||||||||||||
| Interest capitalized | 0.7 | 1.0 | 6.9 | 10.8 | 4.5 | 1.2 | ||||||||||||
| Earnings (loss) | (127.4 | ) | (65.5 | ) | 71.4 | 129.4 | 236.2 | 254.7 | ||||||||||
| Interest (A) | 10.6 | 3.9 | 7.1 | 11.0 | 4.8 | 1.8 | ||||||||||||
| Amortization of deferred financing costs | 1.5 | 0.5 | 0.9 | 0.1 | 0.2 | 0.4 | ||||||||||||
| Interest portion of rental expense | 1.3 | 1.1 | 0.9 | 0.9 | 0.8 | 0.8 | ||||||||||||
| Fixed Charges | $ | 13.4 | $ | 5.5 | $ | 8.9 | $ | 12.0 | $ | 5.8 | $ | 3.0 | ||||||
| Ratio of Earnings to Fixed Charges | (B) | (B) | 8.02 | 10.78 | 40.72 | 84.90 | ||||||||||||
(A) Amount includes interest expense on debt and capitalized interest during the period.
(B) For the year ended December 31, 2016, there was a deficiency of earnings to cover the fixed charges of $114.2 million. For the year ended December 31, 2015, there was a deficiency of earnings to cover the fixed charges of $60.0 million. Accordingly, the ratios for these periods have not been presented.