| Six months ended June 30, | Year ended December 31, | ||||||||||||||||||||||
| 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | ||||||||||||||||||
| COMPUTATION OF EARNINGS: | |||||||||||||||||||||||
Income (loss) from continuing operations before income taxes | $ | (2,628 | ) | $ | 3,144 | $ | 10,634 | $ | 56,870 | $ | 35,896 | $ | 19,993 | ||||||||||
| Add: | |||||||||||||||||||||||
| Fixed charges, as defined | 1,571 | 2,831 | 2,117 | 1,823 | 2,132 | 8,382 | |||||||||||||||||
| Subtract: | |||||||||||||||||||||||
| Capitalized interest | — | — | — | — | — | (91 | ) | ||||||||||||||||
| Earnings (loss), as defined | $ | (1,057 | ) | $ | 5,975 | $ | 12,751 | $ | 58,693 | $ | 38,028 | $ | 28,284 | ||||||||||
| COMPUTATION OF FIXED CHARGES: | |||||||||||||||||||||||
Interest expense, including capitalized interest | $ | 1,145 | $ | 1,979 | $ | 1,521 | $ | 1,373 | $ | 1,766 | $ | 8,059 | |||||||||||
Estimate of interest within rental expense (1) | 426 | 852 | 596 | 450 | 366 | 323 | |||||||||||||||||
| Fixed charges, as defined | $ | 1,571 | $ | 2,831 | $ | 2,117 | $ | 1,823 | $ | 2,132 | $ | 8,382 | |||||||||||
| Ratio of earnings to fixed charges | N/A | 2.11 | 6.02 | 32.20 | 17.84 | 3.37 | |||||||||||||||||
Deficiency of earnings to cover fixed charges | $ | (2,628 | ) | N/A | N/A | N/A | N/A | N/A | |||||||||||||||
| (1) | One-third of rental expense is deemed to be representative of interest. |
