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Revenue | 12 Months Ended
--- | ---
Dec. 31, 2013
Revenue [Abstract] |
Revenue | Revenue The Company differentiates revenue and cost of revenue based on whether the source of revenue is attributable to products, rentals or services. Revenue and cost of revenue by source are as follows (in thousands):
| Year ended December 31,
| 2013 |  | 2012 |  | 2011
Revenue: |  |  |  |  |
Products | $ | 282,639 |  |  | $ | 224,777 |  |  | $ | 181,417 |
Rentals | 62,042 |  |  | 67,938 |  |  | 63,610 |
Services | 26,384 |  |  | 20,113 |  |  | 13,758 |
| $ | 371,065 |  |  | $ | 312,828 |  |  | $ | 258,785 |
Cost of Revenue: |  |  |  |  |
Products | $ | 180,800 |  |  | $ | 135,367 |  |  | $ | 115,875 |
Rentals | 24,987 |  |  | 30,618 |  |  | 25,971 |
Services | 9,916 |  |  | 8,051 |  |  | 4,997 |
Depreciation | 7,835 |  |  | 7,173 |  |  | 6,122 |
| $ | 223,538 |  |  | $ | 181,209 |  |  | $ | 152,965 |

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- Definition Revenues and Cost of Revenues by Product Rental or Service Source + References No definition available. + Details
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