Stockholders Equity - Schedule of Accumulated Other Comprehensive Loss and Related Tax Effects (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ (40,071)	$ (56,621)	$ (46,848)
Other comprehensive earnings before reclassifications	(17,721)	17,284	(12,204)
Amounts reclassified out of other comprehensive earnings	1,035	487	2,243
Tax benefit (expense)	(1,854)	(1,221)	188
Ending Balance	(58,611)	(40,071)	(56,621)
Net Unrealized Gains (Losses) Defined Benefit Pension and Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(40,081)	(48,623)	(43,120)
Other comprehensive earnings before reclassifications	(5,429)	7,545	(8,837)
Amounts reclassified out of other comprehensive earnings	2,316	2,950	2,822
Tax benefit (expense)	(866)	(1,953)	512
Ending Balance	(44,060)	(40,081)	(48,623)
Net Unrealized Gains (Losses) Cash Flow Hedging Instruments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(691)	531	(7)
Other comprehensive earnings before reclassifications	3,925	509	1,441
Amounts reclassified out of other comprehensive earnings	(1,281)	(2,463)	(579)
Tax benefit (expense)	(988)	732	(324)
Ending Balance	965	(691)	531
Cumulative Translation Adjustment and Other
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	701	(8,529)	(3,721)
Other comprehensive earnings before reclassifications	(16,217)	9,230	(4,808)
Ending Balance	$ (15,516)	$ 701	$ (8,529)