Restructuring Liabilities - Summary of Changes in Restructuring Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	$ 23,461
Current period charges	5,937	$ 36,000
Change in estimate	(2,658)
Payments and usage—net of accretion	(16,979)
Balance at end of period	9,761
Severance and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	22,596
Current period charges	5,937
Change in estimate	(2,402)
Payments and usage—net of accretion	(16,870)
Balance at end of period	9,261
Facility Closing Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	865
Change in estimate	(256)
Payments and usage—net of accretion	(109)
Balance at end of period	$ 500