Acquisitions - Additional Information (Detail) $ in Thousands, € in Millions			3 Months Ended								11 Months Ended		12 Months Ended
	Jan. 31, 2015 USD ($)	Jan. 31, 2015 EUR (€)	Sep. 29, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jul. 01, 2016 USD ($)	Apr. 01, 2016 USD ($)	Jan. 01, 2016 USD ($)	Oct. 02, 2015 USD ($)		Sep. 29, 2017 USD ($)		Sep. 30, 2016 USD ($)		Oct. 02, 2015 USD ($)	[2]
Business Acquisition [Line Items]
Sales			$ 531,527	$ 503,753	$ 509,182	$ 457,733	$ 543,752	$ 517,092	$ 490,310	$ 441,477	$ 1,774,449	[1]	$ 2,002,195	[1]	$ 1,992,631	[1]	$ 2,002,793
Belgium-based | Barco N V
Business Acquisition [Line Items]
Business acquired	$ 171,000	€ 150
Business acquisition working capital adjustment	$ 15,000
Acquisition-related costs											3,400
Sales											82,500		151,600		155,700
Operating earnings (loss)											$ (16,000)		$ 7,800		$ 2,600

[1] Based on country from which the sale originated and the sale was recorded.

[2] (Recast)