Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data - Unaudited - Schedule of Quarterly Financial Data - Unaudited (Detail)

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Quarterly Financial Data - Unaudited - Schedule of Quarterly Financial Data - Unaudited (Detail) (USD $)
In Thousands, except Per Share data, 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
Quarterly Financial Information Disclosure [Abstract]                      
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
Gross profit 81,307 152,466 153,170 76,959 105,072 180,652 147,696 80,738 463,902 514,158 493,919
Net income (loss) attributable to Central Garden & Pet Company $ (22,581) $ 13,725 $ 22,196 $ (15,269) $ (10,059) $ 22,699 $ 21,623 $ (13,090) $ (1,929) $ 21,173 $ 28,323
Net income (loss) per share:                      
Basic $ (0.47) $ 0.28 $ 0.46 $ (0.32) $ (0.21) $ 0.48 $ 0.46 $ (0.27) $ (0.04) $ 0.44 $ 0.50
Diluted $ (0.47) $ 0.28 $ 0.46 $ (0.32) $ (0.21) $ 0.47 $ 0.45 $ (0.27) $ (0.04) $ 0.44 $ 0.50
Weighted average common shares outstanding:                      
Basic 48,264 48,173 48,064 47,871 47,704 47,661 47,343 47,823 48,094 47,622 56,217
Diluted 48,264 48,822 48,740 47,871 47,704 48,388 48,036 47,823 48,094 48,374 56,645