Severance And Related Costs (Summary Of Severance Charges On Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Sep. 27, 2014
Restructuring Cost and Reserve [Line Items]
Total severance and related costs	$ 2,557	$ 3,376
Accrued Payroll And Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and related costs	1,215	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	$ 1,342	$ 1,783