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Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Schedule of Deferred Revenue by Arrangement | A rollforward of the Company’s deferred revenue is as follows:
|  | Six Months Ended June 30, 2018 |
Beginning balance, January 1(1) |  | $ | 14,448 |
Amount of deferred revenue recognized in income |  |  | (10,092 | )
Additions to deferred revenue |  |  | 9,924 |
Ending balance, June 30(2) |  | $ | 14,280 |
| (1) | Beginning deferred revenue as of January 1, 2018 included $11,322 of current deferred revenue and $3,126 of long-term deferred revenue.
| (2) | Ending deferred revenue as of June 30, 2018 included $10,729 of current deferred revenue and $3,551 of long-term deferred revenue.
Summary of Revenue from Contracts with Customers | The following table summarizes revenue from contracts with customers:
|  | Three Months Ended June 30, 2018 |
|  | Vacuum & Analysis |  |  | Light & Motion |  |  | Total |
Net revenues: |  |  |  |  |  |  |  |  |  |  |  |
Products |  | $ | 321,454 |  |  | $ | 188,545 |  |  | $ | 509,999 |
Services |  |  | 46,874 |  |  |  | 16,267 |  |  |  | 63,141 |
Total net revenues |  | $ | 368,328 |  |  | $ | 204,812 |  |  | $ | 573,140 |
|  | Three Months Ended June 30, 2017 |
|  | Vacuum & Analysis |  |  | Light & Motion |  |  | Total |
Net revenues: |  |  |  |  |  |  |  |  |  |  |  |
Products |  | $ | 269,665 |  |  | $ | 156,652 |  |  | $ | 426,317 |
Services |  |  | 40,296 |  |  |  | 14,144 |  |  |  | 54,440 |
Total net revenues |  | $ | 309,961 |  |  | $ | 170,796 |  |  | $ | 480,757 |
|  | Six Months Ended June 30, 2018 |
|  | Vacuum & Analysis |  |  | Light & Motion |  |  | Total |
Net revenues: |  |  |  |  |  |  |  |  |  |  |  |
Products |  | $ | 625,790 |  |  | $ | 380,886 |  |  | $ | 1,006,676 |
Services |  |  | 90,882 |  |  |  | 29,857 |  |  |  | 120,739 |
Total net revenues |  | $ | 716,672 |  |  | $ | 410,743 |  |  | $ | 1,127,415 |
|  | Six Months Ended June 30, 2017 |
|  | Vacuum & Analysis |  |  | Light & Motion |  |  | Total |
Net revenues: |  |  |  |  |  |  |  |  |  |  |  |
Products |  | $ | 511,120 |  |  | $ | 303,135 |  |  | $ | 814,255 |
Services |  |  | 76,825 |  |  |  | 26,830 |  |  |  | 103,655 |
Total net revenues |  | $ | 587,945 |  |  | $ | 329,965 |  |  | $ | 917,910 |

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