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Deferred Revenue and Customer Advances (Tables) | 9 Months Ended
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Oct. 01, 2017
Deferred Revenue and Customer Advances | Deferred revenue and customer advances consist of the following and are included in short and long-term deferred revenue and customer advances on the balance sheet:
|  | October 1, 2017 |  |  | December 31, 2016 |
|  | (in thousands) |
Extended warranty |  | $ | 26,492 |  |  | $ | 28,200 |
Customer advances, undelivered elements and other |  |  | 58,577 |  |  |  | 32,938 |
Maintenance and training |  |  | 58,123 |  |  |  | 46,803 |
Total |  | $ | 143,192 |  |  | $ | 107,941 |

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- Definition Schedule of deferred revenue and customer advances. + References No definition available. + Details
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Namespace Prefix: | ter_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration