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Reportable Segments (Tables) | 3 Months Ended
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Mar. 31, 2017
Segment Reporting [Abstract] |
Revenue and other financial information by reportable segment | The following table presents revenue and other financial information by reportable segment during the three months ended March 31, 2017 and 2016 (in thousands):
Three Months Ended |  | Contract Operations |  | Aftermarket Services |  | Reportable Segments Total
March 31, 2017: |  |  |  |  |  |  |  |  |
Revenue from external customers |  | $ | 149,984 |  |  | $ | 39,901 |  |  | $ | 189,885 |
Gross margin |  | 85,887 |  |  | 6,169 |  |  | 92,056 |
March 31, 2016: |  |  |  |  |  |  |  |  |
Revenue from external customers |  | $ | 176,239 |  |  | $ | 37,056 |  |  | $ | 213,295 |
Gross margin |  | 108,060 |  |  | 6,694 |  |  | 114,754 |
Reconciliation of net income (loss) to gross margin | The following table reconciles total gross margin to income (loss) before income taxes (in thousands):
| Three Months Ended March 31,
| 2017 |  | 2016
Total gross margin | $ | 92,056 |  |  | $ | 114,754 |
Less: |  |  |
Selling, general and administrative | 27,553 |  |  | 34,651 |
Depreciation and amortization | 47,772 |  |  | 53,927 |
Long-lived asset impairment | 8,245 |  |  | 9,860 |
Restatement and other charges | 801 |  |  | — |
Restructuring and other charges | 457 |  |  | 8,065 |
Interest expense | 21,421 |  |  | 20,300 |
Debt extinguishment costs | 291 |  |  | — |
Other income, net | (794 | ) |  | (1,989 | )
Loss before income taxes | $ | (13,690 | ) |  | $ | (10,060 | )

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- Definition Tabular disclosure of revenue, gross margin, assets, and capital expenditures by reportable segment reconciled to the entity's corresponding consolidated amount. + References No definition available. + Details
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- Definition Reconciliation of net income (loss) to gross margin. + References No definition available. + Details
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