| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||
| 2013 | 2012 | 2013 | 2012 | ||||||||||||||
| Earnings | |||||||||||||||||
| Pre-tax net (loss) income | $ | (662 | ) | $ | 5,923 | $ | 6,068 | $ | 10,328 | ||||||||
| Add: | |||||||||||||||||
| Fixed charges | 10,151 | 7,905 | 20,160 | 15,610 | |||||||||||||
| Earnings, as adjusted | $ | 9,489 | $ | 13,828 | $ | 29,055 | $ | 25,938 | |||||||||
| Fixed charges | |||||||||||||||||
| Interest expensed and capitalized | $ | 9,522 | $ | 7,271 | $ | 18,957 | $ | 14,407 | |||||||||
| Amortized premiums, discounts and capitalized expenses related to indebtedness | 621 | 627 | 1,188 | 1,189 | |||||||||||||
| Estimate of interest within rental expense | 8 | 7 | 15 | 14 | |||||||||||||
| Fixed charges, as adjusted | 10,151 | 7,905 | 20,160 | 15,610 | |||||||||||||
Preferred stock dividends (1) | 2,523 | — | 2,827 | — | |||||||||||||
| Combined fixed charges and preferred stock dividends | $ | 12,674 | $ | 7,905 | $ | 22,987 | $ | 15,610 | |||||||||
| Ratio of earnings to combined fixed charges and preferred stock dividends | 0.75 | x | 1.75 | x | 1.26 | x | 1.66 | x | |||||||||
