Annual report pursuant to Section 13 and 15(d)

Goodwill - Changes in Carrying Amount of Goodwill (Detail)

v3.8.0.1
Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Sep. 27, 2014
Goodwill [Line Items]        
Goodwill $ 665,836 $ 640,946 $ 618,650 $ 617,794
Accumulated impairment losses (409,561) (409,561) (409,561) (409,561)
Total goodwill 256,275 231,385 209,089 208,233
Additions in fiscal year 25,890 22,296 856  
Sale of business (1,000)      
Garden Products Segment        
Goodwill [Line Items]        
Goodwill 219,056 219,056 213,583 213,583
Accumulated impairment losses (213,583) (213,583) (213,583) (213,583)
Total goodwill 5,473 5,473 0 0
Additions in fiscal year 5,473 0  
Pet Products Segment        
Goodwill [Line Items]        
Goodwill 446,780 421,890 405,067 404,211
Accumulated impairment losses (195,978) (195,978) (195,978) (195,978)
Total goodwill 250,802 225,912 209,089 $ 208,233
Additions in fiscal year 25,890 $ 16,823 $ 856  
Sale of business $ (1,000)