Central Garden & Pet Company Annual report pursuant to Section 13 and 15(d)

Acquisitions and Investments in Joint Ventures - Summary of Recording of Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Sep. 27, 2014	Apr. 01, 2014	Sep. 28, 2013	Sep. 29, 2012
Business Acquisition [Line Items]
Goodwill	$ 209,089	$ 208,233		$ 205,756	$ 210,223
Envincio, LLC [Member]
Business Acquisition [Line Items]
Current assets, net of cash and cash equivalents acquired			$ 6,650
Fixed assets			20
Goodwill			3,333
Intangible assets			11,450
Current liabilities			(1,170)
Net assets acquired, less cash and cash equivalents			20,283
As Previously Reported [Member] \| Envincio, LLC [Member]
Business Acquisition [Line Items]
Current assets, net of cash and cash equivalents acquired			6,650
Fixed assets			20
Goodwill			2,477
Intangible assets			12,306
Current liabilities			(1,170)
Net assets acquired, less cash and cash equivalents			20,283
Adjustments [Member] \| Envincio, LLC [Member]
Business Acquisition [Line Items]
Current assets, net of cash and cash equivalents acquired			0
Fixed assets			0
Goodwill			856
Intangible assets			(856)
Current liabilities			0
Net assets acquired, less cash and cash equivalents			$ 0