Schedule of Accumulated Other Comprehensive Earnings (Loss) and Related Tax Effects (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 28, 2014		Mar. 29, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (40,071)	[1]	$ (56,621)
Other comprehensive earnings before reclassifications	3,068		2,411
Amounts reclassified out of other comprehensive earnings	(119)		513
Tax expense	(513)		(778)
Ending Balance	(37,635)		(54,475)
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	1,158		1,475
Tax expense	(213)		(275)
Ending Balance	(39,136)		(47,423)
Net Unrealized Gains (Losses) Cash Flow Hedging Instruments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(691)		531
Other comprehensive earnings before reclassifications	2,078		2,303
Amounts reclassified out of other comprehensive earnings	(1,277)		(962)
Tax expense	(300)		(503)
Ending Balance	(190)		1,369
Cumulative Translation Adjustment and Other
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	701		(8,529)
Other comprehensive earnings before reclassifications	990		108
Amounts reclassified out of other comprehensive earnings	0		0
Tax expense	0		0
Ending Balance	$ 1,691		$ (8,421)

[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.