Other Intangible Assets - Components of Gross and Net Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Sep. 26, 2015	Dec. 27, 2014
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	$ 144,100	$ 144,100	$ 145,000
Accumulated Amortization	(44,200)	(43,200)	(39,800)
Accumulated Impairment	(25,400)	(25,400)	(18,100)
Net Carrying Value	74,552	75,460	87,061
Marketing-Related Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	73,700	73,700	75,100
Accumulated Amortization	(10,700)	(10,400)	(10,100)
Accumulated Impairment	(24,200)	(24,200)	(16,900)
Net Carrying Value	38,800	39,100	48,100
Other Acquired Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	27,100	27,100	27,100
Accumulated Amortization	(10,700)	(10,500)	(9,000)
Accumulated Impairment	(1,200)	(1,200)	(1,200)
Net Carrying Value	15,200	15,400	16,900
Amortizable [Member] | Marketing-Related Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	14,100	14,100	15,500
Accumulated Amortization	(10,700)	(10,400)	(10,100)
Accumulated Impairment	0	0	0
Net Carrying Value	3,400	3,700	5,400
Amortizable [Member] | Customer-Related Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	43,300	43,300	42,800
Accumulated Amortization	(22,800)	(22,300)	(20,700)
Accumulated Impairment	0	0	0
Net Carrying Value	20,500	21,000	22,100
Amortizable [Member] | Other Acquired Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	19,300	19,300	19,400
Accumulated Amortization	(10,700)	(10,500)	(9,000)
Accumulated Impairment	0	0	0
Net Carrying Value	8,600	8,800	10,400
Nonamortizable [Member] | Marketing-Related Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	59,600	59,600	59,600
Accumulated Amortization	0	0	0
Accumulated Impairment	(24,200)	(24,200)	(16,900)
Net Carrying Value	35,400	35,400	42,700
Nonamortizable [Member] | Other Acquired Intangible Assets [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross	7,800	7,800	7,700
Accumulated Amortization	0	0	0
Accumulated Impairment	(1,200)	(1,200)	(1,200)
Net Carrying Value	$ 6,600	$ 6,600	$ 6,500