Derivative Instruments and Hedging Activities (Fair Value of Outstanding Designated and Undesignated Derivative Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Sep. 28, 2019
Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 454	$ 907
Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	271	251
Cash flow derivatives
Derivatives, Fair Value [Line Items]
Derivative assets	170	907
Designated hedge derivatives | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	454	907
Designated hedge derivatives | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	162	133
Designated hedge derivatives | Cash flow derivatives | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	170	907
Designated hedge derivatives | Cash flow derivatives | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	162	133
Designated hedge derivatives | Cross currency swap | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	284
Designated hedge derivatives | Cross currency swap | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0
Hedge derivatives not designated | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Hedge derivatives not designated | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 109	$ 118