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Depreciation and Amortization | 9 Months Ended
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Sep. 30, 2014
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Depreciation and Amortization | 4. Depreciation and Amortization Depreciation and amortization expense for property and equipment and intangible assets for the three and nine months ended September 30, 2014 and 2013 was as follows (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Operating expenses |  | $ | 5,087 |  |  | $ | 4,686 |  |  | $ | 14,666 |  |  | $ | 13,911 |
Corporate general and administrative expenses |  |  | 101 |  |  |  | 84 |  |  |  | 334 |  |  |  | 233 |
Total depreciation and amortization expense |  | $ | 5,188 |  |  | $ | 4,770 |  |  | $ | 15,000 |  |  | $ | 14,144 |

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- Definition Depreciation and amortization. + References No definition available. + Details
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