Exhibit 12.1
| Year Ended December 31, | Three months ended March 31, |
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| 2013 | 2014 | 2015 | 2016 | 2017 | 2017 | 2018 | ||||||||||||||||||||||
| Ratio of earnings to fixed charges: |
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| Earnings: |
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| Income from continuing operations |
$ | 116,309 | $ | 141,642 | $ | 97,933 | $ | 57,375 | $ | 131,226 | $ | 27,245 | $ | 33,183 | ||||||||||||||
| Add: |
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| Fixed charges |
77,125 | 174,437 | 192,823 | 205,133 | 211,252 | 51,200 | 59,138 | |||||||||||||||||||||
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| Total earnings and fixed charges |
$ | 193,434 | $ | 316,079 | $ | 290,756 | $ | 262,508 | $ | 342,478 | $ | 78,445 | $ | 92,321 | ||||||||||||||
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| Fixed Charges: |
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| Interest expense and amortized debt discount and loan cost |
$ | 73,269 | $ | 166,942 | $ | 186,556 | $ | 198,367 | $ | 204,161 | $ | 49,198 | $ | 57,462 | ||||||||||||||
| Estimated interest portion of rental expense |
3,856 | 7,495 | 6,267 | 6,766 | 7,091 | 2,002 | 1,676 | |||||||||||||||||||||
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| Total fixed charges |
$ | 77,125 | $ | 174,437 | $ | 192,823 | $ | 205,133 | $ | 211,252 | $ | 51,200 | $ | 59,138 | ||||||||||||||
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| Ratio of Earnings to Fixed Charges(1) |
2.51 | 1.81 | 1.51 | 1.28 | 1.62 | 1.53 | 1.56 | |||||||||||||||||||||
| (1) | The ratio of earnings to fixed charges are computed by dividing earnings by fixed charges. For these purposes, “earnings” consist of income from continuing operations before provision for income taxes plus fixed charges, and “fixed charges” consist of interest expense on all indebtedness, amortization of debt issuance costs, and that portion of rental expense deemed to be representative of interest. |