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	Dec. 26, 2015	Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Components of long-term debt
Interest expense					$ 28,209,000	$ 42,847,000	$ 40,027,000
Non-cash charge				$ 3,300,000	0	3,337,000	$ 537,000
Unamortized debt issuance costs					4,800,000
Senior notes
Components of long-term debt
Unamortized debt issuance costs					$ 4,840,000	$ 5,635,000
Senior notes \| Senior Notes Due November 2023
Components of long-term debt
Debt, aggregate principal amount		$ 400,000,000.0
Debt instrument interest rate stated, percentage		6.125%			6.125%
Debt issuance costs		$ 6,300,000
Debt redemption price percentage		35.00%
Senior notes \| Senior Notes Due November 2023 \| Redemption prior to November 15, 2018
Components of long-term debt
Debt redemption price percentage		106.125%
Senior notes \| Senior Notes Due November 2023 \| Redemption on or after November 15, 2018
Components of long-term debt
Debt redemption price percentage		104.594%
Senior notes \| Senior Notes Due November 2023 \| Redemption on or after November 15, 2019
Components of long-term debt
Debt redemption price percentage		103.063%
Senior notes \| Senior Notes Due November 2023 \| Redemption on or after November 15, 2020
Components of long-term debt
Debt redemption price percentage		101.531%
Senior notes \| Senior Notes Due November 2023 \| Redemption on or after November 15, 2021
Components of long-term debt
Debt redemption price percentage		100.00%
Senior notes \| Senior Notes Due November 2023 \| Upon change of control
Components of long-term debt
Debt redemption price percentage		101.00%
Senior notes \| Senior Notes Repaid December 2015
Components of long-term debt
Debt instrument interest rate stated, percentage			8.25%		8.25%
Debt, aggregate principal amount redeemed				$ 400,000,000
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 \| Asset-based Revolving Credit Facility
Components of long-term debt
Debt issuance costs					$ 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					1,800,000
Borrowing availability					$ 368,900,000
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 \| Asset-based Revolving Credit Facility \| LIBOR
Components of long-term debt
Applicable interest margin rate on the credit facility					1.25%
Applicable interest rate on the credit facility					2.50%
Asset-based revolving credit facility \| Asset-based Revolving Credit Facility \| Base Rate
Components of long-term debt
Applicable interest margin rate on the credit facility					0.25%
Applicable interest rate on the credit facility					4.50%
Asset-based revolving credit facility \| Asset-based Revolving Credit Facility \| Minimum \| LIBOR
Components of long-term debt
Applicable interest margin rate on the credit facility					1.25%
Asset-based revolving credit facility \| Asset-based Revolving Credit Facility \| Minimum \| Base Rate
Components of long-term debt
Applicable interest margin rate on the credit facility					0.25%
Asset-based revolving credit facility \| Asset-based Revolving Credit Facility \| Maximum \| LIBOR
Components of long-term debt
Applicable interest margin rate on the credit facility					1.50%
Asset-based revolving credit facility \| Asset-based Revolving Credit Facility \| Maximum \| Base Rate
Components of long-term debt
Applicable interest margin rate on the credit facility					0.50%