Annual report pursuant to Section 13 and 15(d)

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

v3.5.0.2
Business Segment Data - Class of Similar Products Which Represented Approximately 10% or More of Company's Consolidated Net Sales (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 24, 2016
Jun. 25, 2016
Mar. 26, 2016
Dec. 26, 2015
Sep. 26, 2015
Jun. 27, 2015
Mar. 28, 2015
Dec. 27, 2014
Sep. 24, 2016
Sep. 26, 2015
Sep. 27, 2014
Revenue from External Customer [Line Items]                      
Net sales $ 413,412 $ 514,544 $ 541,249 $ 359,812 $ 386,369 $ 459,446 $ 497,602 $ 307,320 $ 1,829,017 $ 1,650,737 $ 1,604,357
Other pet products [Member]                      
Revenue from External Customer [Line Items]                      
Net sales                 689,300 594,700 774,200
Garden controls and fertilizer products [Member]                      
Revenue from External Customer [Line Items]                      
Net sales                 298,800 286,300 262,500
Wild bird feed [Member]                      
Revenue from External Customer [Line Items]                      
Net sales                 183,600 193,200 202,100
Grass seed [Member]                      
Revenue from External Customer [Line Items]                      
Net sales                     183,100
Other garden supplies [Member]                      
Revenue from External Customer [Line Items]                      
Net sales                 331,300 343,500 $ 182,500
Dog and cat products [Member]                      
Revenue from External Customer [Line Items]                      
Net sales                 $ 326,000 $ 233,000