Long-Term Indebtedness - Additional Information (Details) $ in Thousands			9 Months Ended
	Jul. 01, 2022 USD ($)	May 18, 2022 USD ($)	Oct. 02, 2022 USD ($)	May 17, 2022 USD ($)	Jan. 02, 2022 USD ($)	Oct. 03, 2021 USD ($)	Apr. 30, 2020 USD ($)	Aug. 31, 2019 USD ($) agreement	Jun. 30, 2019 USD ($) agreement	Apr. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Summary of Long-term debt
Long-term debt, gross			$ 2,389,220		$ 2,629,524	$ 2,627,803
Long-term debt, fair value			2,259,200		2,703,500	2,692,400
June 2019 Swap Agreements
Summary of Long-term debt
Notional amount									$ 300,000
Number of agreements | agreement									3
August 2019 Swap Agreements
Summary of Long-term debt
Notional amount								$ 400,000
Number of agreements | agreement								2
Second Amended and Restated Revolving Loan
Summary of Long-term debt
Maximum borrowing capacity		$ 350,000	350,000	$ 481,000
Available borrowing capacity			219,000
Line of credit facility decrease		$ 131,000	110,000
Long-term line of credit					0	0
Letters of credit outstanding, amount			$ 21,000		20,200
Interest rate, stated percentage			5.78%
Commitment fee percentage			0.625%
Long-term debt, gross			$ 110,000
Second Amended and Restated Term Loan B
Summary of Long-term debt
Maximum borrowing capacity			$ 479,000
Interest rate, stated percentage			3.23%
Long-term debt, gross			$ 479,000		479,000	479,000
Second Amended and Restated Term Loan B | LIBOR
Summary of Long-term debt
Basis spread on variable rate			1.75%
2024 Notes
Summary of Long-term debt
Interest rate, stated percentage											4.875%
Long-term debt, gross			$ 949,490		949,490	949,490
Debt instrument, face amount											$ 300,000
Periodic payment of interest			23,100
Senior Unsecured 2024 Notes Add-on
Summary of Long-term debt
Debt instrument, face amount										$ 700,000
2025 Notes
Summary of Long-term debt
Long-term debt, gross	$ 365,000		365,000		725,000	725,000
Repayment of notes payable	$ 360,000		360,000
Debt instrument redemption price percentage	103.50%
Amortization of debt discount premium	$ 17,500
Amortization of financing costs and discounts	12,600
Write off of deferred debt issuance cost	$ 5,000
Periodic payment of interest			12,700
2025 Notes | Six Flags Theme Parks Inc.
Summary of Long-term debt
Interest rate, stated percentage							7.00%
Debt instrument, face amount							$ 725,000
2027 Notes
Summary of Long-term debt
Interest rate, stated percentage										5.50%
Long-term debt, gross			500,000		$ 500,000	$ 500,000
Debt instrument, face amount										$ 500,000
Periodic payment of interest			$ 13,800