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Depreciation and Amortization | 9 Months Ended
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Sep. 30, 2018
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Depreciation and Amortization | Note 6. Depreciation and Amortization Depreciation and amortization expense for property and equipment and intangible assets for the three and nine months ended September 30, 2018 and 2017 was as follows (in thousands):
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Operating expenses |  | $ | 5,794 |  |  | $ | 5,796 |  |  | $ | 17,301 |  |  | $ | 16,885 |
Corporate general and administrative expenses |  |  | 58 |  |  |  | 92 |  |  |  | 227 |  |  |  | 282 |
Total depreciation and amortization expense |  | $ | 5,852 |  |  | $ | 5,888 |  |  | $ | 17,528 |  |  | $ | 17,167 |

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