Annual report pursuant to Section 13 and 15(d)

Business Segment Data - Class of Similar Products Which Represented More than 10% of Company's Consolidated Net Sales (Detail)

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Business Segment Data - Class of Similar Products Which Represented More than 10% of Company's Consolidated Net Sales (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 28, 2013
Jun. 29, 2013
Mar. 30, 2013
Dec. 29, 2012
Sep. 29, 2012
Jun. 23, 2012
Mar. 24, 2012
Dec. 24, 2011
Sep. 28, 2013
Sep. 29, 2012
Sep. 24, 2011
Revenue from External Customer [Line Items]                      
Net sales $ 368,837 $ 494,130 $ 498,169 $ 292,497 $ 397,236 $ 533,808 $ 466,903 $ 302,066 $ 1,653,633 $ 1,700,013 $ 1,628,652
Pet supplies (excluding wild bird feed) [Member]
                     
Revenue from External Customer [Line Items]                      
Net sales                 807,400 847,100 773,100
Garden controls and fertilizer products [Member]
                     
Revenue from External Customer [Line Items]                      
Net sales                 274,900 281,700 260,000
Wild bird feed [Member]
                     
Revenue from External Customer [Line Items]                      
Net sales                 210,800 205,100 197,500
Other garden supplies [Member]
                     
Revenue from External Customer [Line Items]                      
Net sales                 183,500 185,700 212,100
Grass seed [Member]
                     
Revenue from External Customer [Line Items]                      
Net sales                 $ 177,000 $ 180,400 $ 185,900