Goodwill - Narrative (Detail) |
3 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2017
USD ($)
|
Sep. 30, 2017
USD ($)
|
Jul. 01, 2017
USD ($)
|
Apr. 01, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Oct. 01, 2016
USD ($)
|
Jul. 02, 2016
USD ($)
|
Apr. 02, 2016
USD ($)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Oct. 02, 2016
reporting_unit
|
|
| Goodwill [Line Items] | ||||||||||||
| Number of reporting units have goodwill and subject to goodwill impairment test | reporting_unit | 9 | |||||||||||
| Impairment charge | $ 16,237,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 16,237,000 | $ 0 | $ 0 | |
| Armstrong Areospace, Inc. | ||||||||||||
| Goodwill [Line Items] | ||||||||||||
| Impairment charge | $ 16,200,000 | |||||||||||
| X | ||||||||||
- Definition Goodwill Impairment Number Of Reporting Units Tested For Impairment No definition available.
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| 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
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| 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.
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| X | ||||||||||
- Details
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