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

Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Detail)

Long-Term Debt - Additional Information (Detail) - USD ($)			1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 22, 2016	Nov. 09, 2015	Dec. 31, 2015	Jan. 31, 2015	Dec. 26, 2015	Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014
Components of long-term debt
Debt, aggregate principal amount						$ 395,269,000	$ 396,982,000
Interest expense						42,847,000	40,027,000	$ 42,844,000
Non-cash charge					$ 3,300,000	3,337,000	537,000	$ 1,731,000
Senior notes [Member]
Components of long-term debt
Debt, aggregate principal amount						$ 394,365,000	$ 396,534,000
Debt redemption price percentage				102.063%
Senior notes [Member] \| Senior Notes Due November 2023 [Member]
Components of long-term debt
Debt, aggregate principal amount		$ 400,000,000
Debt instrument interest rate stated, percentage		6.125%				6.125%
Senior subordinated notes due date						Nov. 15, 2023
Debt issuance cost		$ 6,300,000
Debt redemption price percentage		35.00%
Senior notes [Member] \| Senior Notes Due November 2023 [Member] \| Redemption prior to November 15, 2018 [Member]
Components of long-term debt
Debt redemption price percentage		106.125%
Senior notes [Member] \| Senior Notes Due November 2023 [Member] \| Redemption on or after November 15, 2018 [Member]
Components of long-term debt
Debt redemption price percentage		104.594%
Senior notes [Member] \| Senior Notes Due November 2023 [Member] \| Redemption on or after November 15, 2019 [Member]
Components of long-term debt
Debt redemption price percentage		103.063%
Senior notes [Member] \| Senior Notes Due November 2023 [Member] \| Redemption on or after November 15, 2020 [Member]
Components of long-term debt
Debt redemption price percentage		101.531%
Senior notes [Member] \| Senior Notes Due November 2023 [Member] \| Redemption on or after November 15, 2021 [Member]
Components of long-term debt
Debt redemption price percentage		100.00%
Senior notes [Member] \| Senior Notes Due November 2023 [Member] \| Upon change of control [Member]
Components of long-term debt
Debt redemption price percentage		101.00%
Senior notes [Member] \| Senior Notes Repaid December 2015 [Member]
Components of long-term debt
Debt, aggregate principal amount			$ 400,000,000
Debt instrument interest rate stated, percentage			8.25%				8.25%
Redemption date of senior subordinated notes			Dec. 31, 2015
Senior subordinated notes due date			Mar. 01, 2018
Debt redemption percentage			102.063%
Charge recognized during debt redemption			$ 8,300,000
Interest expense payment reriod			30 days
Interest expense			$ 2,700,000
Non-cash charge			$ 3,300,000
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member]
Components of long-term debt
Debt issuance cost						$ 1,200,000
Credit facility, maximum principal amount	$ 400,000,000.0
Credit facility, additional borrowings available	$ 200,000,000.0
Credit facility, maturity date	Apr. 22, 2021
Borrowings outstanding						0
Letters of credit outstanding						0
Other letters of credit outstanding						2,500,000
Borrowing availability						$ 318,200,000
Credit facility, base rate computation, option second description, basis spread percentage						0.50%
Credit facility, basis percentage for calculation of variable rate spread						1.00%
Debt instrument fixed charge coverage ratio						1.00
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member] \| LIBOR [Member]
Components of long-term debt
Applicable interest margin rate on the credit facility						1.25%
Applicable interest rate on the credit facility						1.78%
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member] \| Base Rate [Member]
Components of long-term debt
Applicable interest margin rate on the credit facility						0.25%
Applicable interest rate on the credit facility						3.75%
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Components of long-term debt
Applicable interest margin rate on the credit facility						1.25%
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Components of long-term debt
Applicable interest margin rate on the credit facility						0.25%
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Components of long-term debt
Applicable interest margin rate on the credit facility						1.50%
Asset-based revolving credit facility [Member] \| Asset-based Revolving Credit Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Components of long-term debt
Applicable interest margin rate on the credit facility						0.50%