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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2017
Accounting Policies [Abstract] |
Depreciation Expense Excluded From Each Line Item in Consolidated Statements of Operations | The following table summarizes depreciation expense excluded from each line item in our consolidated statements of operations (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
Cost of revenues |  | $ | 1,568 |  |  | $ | 1,243 |  |  | $ | 4,510 |  |  | $ | 3,081 |
Operating expense |  | 8,226 |  |  | 6,690 |  |  | 24,700 |  |  | 11,624 |
General and administrative expense |  | 576 |  |  | 512 |  |  | 1,981 |  |  | 1,451 |

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