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Reportable Segments (Tables) | 3 Months Ended
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Mar. 31, 2015
Reportable Segments |
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, 2015 and 2014 (in thousands):
Three months ended |  | North America Contract Operations |  | International Contract Operations |  | Aftermarket Services |  | Fabrication |  | Reportable Segments Total |
March 31, 2015: |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers |  | $ | 202,261 |  | $ | 120,691 |  | $ | 86,856 |  | $ | 319,274 |  | $ | 729,082 |
Gross margin(1) |  | 119,582 |  | 76,352 |  | 20,922 |  | 52,156 |  | 269,012 |
March 31, 2014: |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers |  | $ | 156,523 |  | $ | 111,040 |  | $ | 88,048 |  | $ | 287,397 |  | $ | 643,008 |
Gross margin(1) |  | 85,442 |  | 70,008 |  | 20,227 |  | 57,809 |  | 233,486 |
| (1) |  | Gross margin, a non-GAAP financial measure, is reconciled, in total, to net income (loss), its most directly comparable measure calculated and presented in accordance with GAAP, below.
Reconciliation of net income to gross margin | The following table reconciles net income to gross margin (in thousands):
|  | Three Months Ended March 31, |
|  | 2015 |  | 2014 |
Net income |  | $ | 41,085 |  | $ | 34,894 |
Selling, general and administrative |  | 86,686 |  | 92,578 |
Depreciation and amortization |  | 95,808 |  | 85,522 |
Long-lived asset impairment |  | 12,732 |  | 3,807 |
Restructuring charges |  | 4,790 |  | 4,822 |
Interest expense |  | 27,298 |  | 28,308 |
Equity in income of non-consolidated affiliates |  | (5,006 | ) | (4,693 | )
Other (income) expense, net |  | 7,841 |  | (2,434 | )
Provision for income taxes |  | 16,491 |  | 9,409 |
Income from discontinued operations, net of tax |  | (18,713 | ) | (18,727 | )
Gross margin |  | $ | 269,012 |  | $ | 233,486 |

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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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