Segments - Narrative (Detail) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jul. 01, 2017 |
Apr. 01, 2017 |
Dec. 31, 2016 |
Oct. 01, 2016 |
Jul. 02, 2016 |
Apr. 02, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Segment Reporting Information | |||||||||||
| Impairment Loss | $ 16,237,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 16,237,000 | $ 0 | $ 0 |
| Goodwill | 125,645,000 | 115,207,000 | 125,645,000 | 115,207,000 | 115,369,000 | ||||||
| Operating Segments | Aerospace Segment | |||||||||||
| Segment Reporting Information | |||||||||||
| Impairment Loss | 16,200,000 | 0 | 0 | ||||||||
| Purchased intangible impairment loss | 0 | 0 | 0 | ||||||||
| Goodwill | 125,600,000 | 115,200,000 | 125,600,000 | 115,200,000 | |||||||
| Operating Segments | Test Systems Segment | |||||||||||
| Segment Reporting Information | |||||||||||
| Impairment Loss | 0 | 0 | 0 | ||||||||
| Purchased intangible impairment loss | 0 | 0 | $ 0 | ||||||||
| Goodwill | $ 0 | $ 0 | $ 0 | $ 0 | |||||||
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|