Accrued Minimum Distribution Payment

No definition available.

Name:	fun_AccruedMinimumDistributionPayment
Namespace Prefix:	fun_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the capital expenditure based on certain percentage of partnership parks revenue.

+ References

No definition available.

+ Details

Name:	fun_CapitalExpenditureAsPercentageOfPartnershipParksRevenue
Namespace Prefix:	fun_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the annual distributions by general partners to special partners in Partnership Parks.

+ References

No definition available.

+ Details

Name:	fun_LossContingencyAnnualDistributions
Namespace Prefix:	fun_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the rolling period for making minimum capital expenditure at each of the Partnership Parks.

+ References

No definition available.

+ Details

Name:	fun_LossContingencyRollingPeriodForMinimumCapitalExpenditures
Namespace Prefix:	fun_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the share of the entity in annual distributions to be made by the general partners of the partnership parks.

+ References

No definition available.

+ Details

Name:	fun_LossContingencyShareInAnnualDistributions
Namespace Prefix:	fun_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Partnership Parks, Cash Distribution Percentage, After Management Fee

+ References

No definition available.

+ Details

Name:	fun_PartnershipParksCashDistributionPercentageAfterManagementFee
Namespace Prefix:	fun_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The net cash from (used in) the partnership parks' continuing operations.

+ References

No definition available.

+ Details

Name:	fun_PartnershipParksNetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Namespace Prefix:	fun_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the period of Weighted average EBITDA used for deriving the value of the purchase price.

+ References

No definition available.

+ Details

Name:	fun_PurchasePriceValuationPeriodOfPartnershipParkWeightedAverageEarningsBeforeInterestTaxDepreciationAndAmortization
Namespace Prefix:	fun_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The specified multiple for each of the partnership parks for calculation and valuation of purchase prices.

+ References

No definition available.

+ Details

Name:	fun_PurchasePriceValuationSpecifiedMultiplier
Namespace Prefix:	fun_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the threshold purchase price of partnership parks.

+ References

No definition available.

+ Details

Name:	fun_PurchasePriceValuationThresholdPrice
Namespace Prefix:	fun_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Redeemable Noncontrolling Interest, Equity, Agreed Upon Value

+ References

No definition available.

+ Details

Name:	fun_RedeemableNoncontrollingInterestEquityAgreedUponValue
Namespace Prefix:	fun_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of interest income (expense) classified as nonoperating.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-48

+ Details

Name:	us-gaap_InterestIncomeExpenseNonoperatingNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482987/272-10-50-3

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

+ References

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate for management and service fees under arrangement to manage operations, including, but not limited to, investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_ManagementAndServiceFeesRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Change in the different classes of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-8

+ Details

Name:	us-gaap_PartnersCapitalAccountAcquisitions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Change in the number of units for each class of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

+ References

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitsAcquisitions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_OwnershipAxis=fun_SixFlagsOverGeorgiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=fun_SixFlagsOverTexasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=fun_SubsidiariesSixFlagsOverTexasAndGeorgiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=fun_SubsidiariesSixFlagsOverTexasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=fun_SubsidiariesSixFlagsOverGeorgiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_LimitedPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Non-Controlling Interests - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 28, 2026 USD ($) shares	Jun. 29, 2025 USD ($)	Jun. 28, 2026 USD ($)	Jun. 29, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 1998 USD ($)	Dec. 31, 1997 USD ($)
Noncontrolling Interest [Line Items]
Interest expense, net	$ (102,052)	$ (92,409)	$ (196,980)	$ (179,444)
Six Flags Over Georgia
Noncontrolling Interest [Line Items]
Limited liability company or limited partnership, members or limited partners, ownership interest (as percent)			32.10%
General partner ownership interest (as percent)			68.50%
Six Flags Over Texas
Noncontrolling Interest [Line Items]
Limited liability company or limited partnership, members or limited partners, ownership interest (as percent)			56.90%
The Partnership Parks
Noncontrolling Interest [Line Items]
Annual distributions by general partners to limited partners in partnership parks			$ 93,500
Share of partnership parks' annual distributions paid to six flags entertainment corporation			$ 43,300
Rolling period for making minimum capital expenditure at each of the partnership parks (in years)			5 years
Percentage of capital expenditures to partnership parks' revenues			6.00%
Weighted average period of the park's EBITDA for calculation of value of purchase price (in years)			4 years
Management fees rate (as percent)			3.00%
Cash generated from operating activities by partnerships, after deduction of capital expenditures and excluding the impact of short-term intercompany advances					$ (54,600)
Texas Partnership (SFOT)
Noncontrolling Interest [Line Items]
Units purchased in partnership parks (in shares) \| shares	3.453
Purchase price of partnership units	$ 7,600
Specified multiple for purchase price valuation	8.5		8.5
Specified price for purchase of partnership parks	$ 527,400		$ 527,400
Agreed-upon value for the partnerships						$ 374,800
Partnership parks, cash distribution after management fee (as percent)			92.50%
SFOG
Noncontrolling Interest [Line Items]
Units purchased in partnership parks (in shares) \| shares	0
Specified multiple for purchase price valuation	8.0		8.0
Specified price for purchase of partnership parks	$ 409,700		$ 409,700
Agreed-upon value for the partnerships	535,600		$ 535,600				$ 250,000
Partnership parks, cash distribution after management fee (as percent)			95.00%
Interest expense, net			$ 26,800	$ 17,600
Accrued minimum distribution payment	12,900		12,900
SFOG \| Limited Partner
Noncontrolling Interest [Line Items]
Agreed-upon value for the partnerships	$ 367,200		$ 367,200