EXHIBIT 12
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| Nine Months Ended |
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| September 30, |
| Year Ended December 31, |
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(in thousands) |
| 2017 |
| 2016 |
| 2015 |
| 2014 |
| 2013 |
| 2012 |
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Fixed Charges: |
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Interest expense |
| $ | 11,614 |
| $ | 1,273 |
| $ | 1,307 |
| $ | 1,715 |
| $ | 1,663 |
| $ | 2,309 |
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Capitalized expenses related to indebtedness |
| 7,102 |
| 166 |
| 265 |
| 193 |
| 183 |
| 203 |
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Portion of rental expense which represents interest factor |
| 5 |
| 6 |
| 6 |
| 7 |
| 97 |
| 208 |
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Total Fixed Charges |
| $ | 18,720 |
| $ | 1,445 |
| $ | 1,577 |
| $ | 1,914 |
| $ | 1,944 |
| $ | 2,721 |
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Earnings Available for Fixed Charges: |
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Profit (Loss) before income taxes |
| $ | (2,632 | ) | $ | 66,491 |
| $ | 50,424 |
| $ | 69,538 |
| $ | 59,878 |
| $ | 59,890 |
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Add: Fixed charges |
| 18,720 |
| 1,445 |
| 1,577 |
| 1,914 |
| 1,944 |
| 2,721 |
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Add: Net loss attributable to noncontrolling interest |
| 28 |
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Total Earnings Available for Fixed Charges |
| $ | 16,116 |
| $ | 67,936 |
| $ | 52,002 |
| $ | 71,453 |
| $ | 61,822 |
| $ | 62,611 |
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Ratio of Earnings to Fixed Charges |
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| 47.01 |
| 32.97 |
| 37.32 |
| 31.81 |
| 23.01 |
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Deficiency of Earnings Available to Cover Fixed Charges |
| $ | 2,604 |
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