Severance and Related Costs (Summary Of Severance Charges On Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Sep. 27, 2014
Restructuring Cost and Reserve [Line Items]
Total severance and related costs	$ 1,905	$ 3,376
Accrued Payroll And Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and related costs	807	1,567
Defined Benefit Pension Plan Obligation [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and related costs		26
Other Long-Term Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and related costs	$ 1,098	$ 1,783