Acquisitions (Sara Lee California and Earthgrains acquisition of trademark licenses) - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended			0 Months Ended		3 Months Ended			4 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended
	Feb. 23, 2013	Oct. 04, 2014	Oct. 05, 2013	Feb. 23, 2013	Feb. 23, 2013 Maximum	Feb. 23, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	Dec. 28, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	Oct. 05, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	Jul. 13, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	Apr. 19, 2014 Sara Lee and Earthgrains acquisition of trademark licenses	Oct. 04, 2014 Sara Lee and Earthgrains acquisition of trademark licenses	Dec. 28, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	Aug. 17, 2014 Sara Lee and Earthgrains acquisition of trademark licenses	Feb. 23, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	Oct. 05, 2013 Sara Lee and Earthgrains acquisition of trademark licenses Distribution Rights
Business Acquisition [Line Items]
Business acquisition						$ 49,950,000
Intangible assets amortization period	21 years
Change in fair value of spare parts															2,000,000
Bargain purchase gain			50,071,000			50,071,000		1,200,000
Deferred income taxes, net								800,000						31,345,000
Holdback				10,000,000									7,600,000	7,600,000
Holdback amount available	10,000,000
Co-pack arrangement period					18 months
Receipt from holdback		7,500,000								7,500,000
Reduction in holdback							100,000	0	0
Final delivery date											Feb. 14, 2014
Acquisition-related costs												1,500,000
Sales related to acquisition												$ 79,700,000