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Deferred Revenue and Customer Advances (Tables) | 3 Months Ended
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Apr. 01, 2018
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:
|  | April 1, 2018 |  |  | December 31, 2017 |
|  | (in thousands) |
Maintenance and training |  | $ | 59,365 |  |  | $ | 57,256 |
Extended warranty |  |  | 24,590 |  |  |  | 24,438 |
Customer advances, undelivered elements and other |  |  | 23,663 |  |  |  | 32,047 |
Total deferred revenue and customer advances |  | $ | 107,618 |  |  | $ | 113,741 |

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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