Annual report pursuant to Section 13 and 15(d)

Fair Value - Narrative (Detail)

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Fair Value - 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
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                      
Impairment charge $ 16,237,000 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 16,237,000 $ 0 $ 0
Intangible asset impairment charge                 0 0 0
Recurring Basis | Level 3 | Other Liabilities                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                      
Financial liabilities carried at fair value $ 0       $ 0       0 0  
Recurring Basis | Level 3 | SG&A                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                      
Fair value adjustments                     1,800,000
Nonrecurring Basis | Level 3                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                      
Impairment charge                   0 0
Intangible asset impairment charge                 0 $ 0 $ 0
Armstrong Areospace, Inc.                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                      
Impairment charge                 $ 16,200,000