Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Jul. 01, 2017	Dec. 28, 2016	Sep. 03, 2014
Fair Value Disclosures [Line Items]
Line of Credit Facility, Amount Outstanding	$ 18,000	$ 18,300
Long-term Debt	41,154			$ 35,000
Term Loan
Fair Value Disclosures [Line Items]
Long-term Debt	20,000	21,300
Equipment Term Loan
Fair Value Disclosures [Line Items]
Long-term Debt	3,300	3,500	$ 3,900
Forward Contracts and swaps
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Assets	1,110	1,010
Foreign currency forward contracts, Financial Liabilities	(3,709)	(5,112)
Interest Rate Swap
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Liabilities	(72)	(103)
Level 1 | Forward Contracts and swaps
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Assets	0	0
Foreign currency forward contracts, Financial Liabilities	0	0
Level 1 | Interest Rate Swap
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Liabilities	0	0
Level 2 | Forward Contracts and swaps
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Assets	1,110	1,010
Foreign currency forward contracts, Financial Liabilities	(3,709)	(5,112)
Level 2 | Interest Rate Swap
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Liabilities	(72)	(103)
Level 3 | Forward Contracts and swaps
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Assets	0	0
Foreign currency forward contracts, Financial Liabilities	0	0
Level 3 | Interest Rate Swap
Fair Value Disclosures [Line Items]
Foreign currency forward contracts, Financial Liabilities	$ 0	$ 0