Schedule of Accumulated Other Comprehensive Earnings (Loss) and Related Tax Effects (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 27, 2013		Dec. 28, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (40,071)	[1]	$ (56,621)
Other comprehensive earnings before reclassifications	4,651		5,199
Amounts reclassified out of other comprehensive earnings	930		(23)
Tax benefit / (expense)	(1,436)		42
Ending Balance	(35,926)		(51,403)
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)
Other comprehensive earnings before reclassifications	0		0
Amounts reclassified out of other comprehensive earnings	580		737
Tax benefit / (expense)	(107)		(137)
Ending Balance	(39,608)		(48,023)
Net Unrealized Gains (Losses) Cash Flow Hedging Instruments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(691)		531
Other comprehensive earnings before reclassifications	3,182		283
Amounts reclassified out of other comprehensive earnings	350		(760)
Tax benefit / (expense)	(1,329)		179
Ending Balance	1,512		233
Cumulative Translation Adjustment and Other
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	701		(8,529)
Other comprehensive earnings before reclassifications	1,469		4,916
Amounts reclassified out of other comprehensive earnings	0		0
Tax benefit / (expense)	0		0
Ending Balance	$ 2,170		$ (3,613)

[1] The condensed consolidated balance sheet as of September 27, 2013 was derived from audited financial statements as of that date, but does not include all disclosures required by accounting principles generally accepted in the United States of America.