Schedule of Derivative Instruments (Detail) - USD ($) $ in Thousands	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017
Derivative [Line Items]
Derivative, Notional Amount									$ 50,300
Subsequent Event [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 658	$ 383	$ 68	$ (261)	$ (557)	$ (736)	$ (824)	$ (1,330)
Subsequent Event [Member] | Mexico, Pesos
Derivative [Line Items]
Derivative, Notional Amount	148,468	142,947	137,944	125,328	90,443	95,500	90,812	88,558
Subsequent Event [Member] | United States of America, Dollars
Derivative [Line Items]
Derivative, Notional Amount	$ 6,740	$ 6,828	$ 6,979	$ 6,746	$ 5,301	$ 5,811	$ 5,713	$ 6,162