Financing - Narrative (Details) - USD ($)	3 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Sep. 28, 2019	Oct. 03, 2020
Line of Credit Facility [Line Items]
Percent added to Adjusted LIBOR rate for one month interest period	1.00%
Commitment fees incurred on credit facility	$ 115,000	$ 100,000
Annual excess cash flow percentage per credit agreement	50.00%
Net cash proceed percentage per credit agreement	100.00%
Alternate base rate
Line of Credit Facility [Line Items]
Effective interest rate applicable to outstanding credit facility (in hundredths)	2.25%
Minimum
Line of Credit Facility [Line Items]
Line of credit facility, commitment fees payable, percent	0.20%
Minimum | Alternate base rate
Line of Credit Facility [Line Items]
Effective interest rate applicable to outstanding credit facility (in hundredths)	1.75%
Maximum
Line of Credit Facility [Line Items]
Line of credit facility, commitment fees payable, percent	0.45%
Revolving credit facility
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity	$ 200,000,000
Maximum borrowing capacity	$ 200,000,000	200,000,000	$ 150,000,000
Debt issuance costs		577,000
Maximum coverage ratio				6.0
Interest coverage ratio				3.0
Weighted average interest rate	4.06%
Revolving Credit Facility outstanding borrowings	$ 68,576,000			$ 75,576,000
Letters of credit outstanding, amount	27,502,000			27,895,000
Line of credit facility, remaining borrowing capacity	$ 103,922,000			$ 96,529,000
Revolving credit facility | London interbank offered rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 50,000,000	60,000,000
Term loan B facility
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity	$ 460,000,000
Principal amount, amortization percentage	1.00%			1.00%
Weighted average interest rate	4.00%
Eurocurrency term loans
Line of Credit Facility [Line Items]
Effective interest rate applicable to outstanding credit facility (in hundredths)	3.25%
Eurocurrency term loans | London interbank offered rate (LIBOR)
Line of Credit Facility [Line Items]
Effective interest rate applicable to outstanding credit facility (in hundredths)	0.75%
Eurocurrency term loans | Minimum | London interbank offered rate (LIBOR)
Line of Credit Facility [Line Items]
Effective interest rate applicable to outstanding credit facility (in hundredths)	0.75%
Eurocurrency borrowing | London interbank offered rate (LIBOR)
Line of Credit Facility [Line Items]
Effective interest rate applicable to outstanding credit facility (in hundredths)	3.25%
Unsecured Debt
Line of Credit Facility [Line Items]
Interest rate, percentage	5.75%
Unsecured Debt | 5.750% Senior Unsecured Notes Due 2027
Line of Credit Facility [Line Items]
Principal amount			$ 350,000,000
Interest rate, percentage			5.75%
Proceeds from debt, net of issuance costs			$ 343,352,000
Repurchase percentage of principal amount due to change of control			101.00%
Repurchase percentage of principal amount due to sale of assets			100.00%