Debt Covenant, Restricted Payments, Maximum

No definition available.

Name:	fun_DebtCovenantRestrictedPaymentsMaximum
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt Instrument Consolidated Leverage Ratio

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
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- Definition

Debt Instrument, Covenant, Liquidity Level, Minimum

+ References

No definition available.

+ Details

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- Definition

Debt Instrument Redemption Percentage Of Original Face Amount

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Line Of Credit Facility Interest Rate Margin Over Libor At Period End

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Total Indebtedness To Consolidated Cash Flow Ratio Requirement

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) of the credit facility.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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+ Details

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Balance Type:	credit
Period Type:	duration

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=fun_SeniorSecuredRevolvingCreditFacilityMember
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Balance Type:
Period Type:

- Details

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- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
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Balance Type:
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- Details

Name:	us-gaap_LongtermDebtTypeAxis=fun_SeniorSecuredTermLoanMember
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Balance Type:
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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Name:	us-gaap_DebtInstrumentAxis=fun_SecondAmended2017CreditAgreementMember
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Long-Term Debt - Narrative (Details)	1 Months Ended				6 Months Ended	12 Months Ended
Long-Term Debt - Narrative (Details)	Oct. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Apr. 30, 2020 USD ($)	Apr. 30, 2017 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2014 USD ($)
Debt Instrument [Line Items]
Line of credit facility, increase (decrease), net		$ 75,000,000.0	$ 100,000,000.0
Available borrowings under revolving credit facility						$ 359,100,000	$ 259,600,000
Restricted Payments
Debt Instrument [Line Items]
Debt instrument consolidated leverage ratio						5.00
Restricted payments						$ 60,000,000
Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Maximum outstanding revolving credit balance during period						$ 140,000,000
Subsidiary \| Cedar Fair L.P. (Parent)
Debt Instrument [Line Items]
Parent ownership percentage in subsidiaries that guarantee debt						100.00%
2017 Credit Agreement \| Secured Debt
Debt Instrument [Line Items]
Repayments of secured debt			$ 463,300,000
2017 Credit Agreement \| Canadian Dollar Offered Rate (CDOR)
Debt Instrument [Line Items]
Interest rate margin over LIBOR				2.00%
2017 Credit Agreement \| Canadian Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 15,000,000
2017 Credit Agreement \| Senior Secured Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount				$ 750,000,000
Original issue discount								$ 900,000
2017 Credit Agreement \| Senior Secured Term Loan \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Effective interest rate percentage				1.75%
2017 Credit Agreement \| Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, face amount				$ 275,000,000
Revolving credit facility outstanding amount						$ 0	0
Second Amended 2017 Credit Agreement
Debt Instrument [Line Items]
Interest rate margin over LIBOR			3.00%
Second Amended 2017 Credit Agreement \| Bridge Loan
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 15,000,000.0
Second Amended 2017 Credit Agreement \| Canadian Dollar Offered Rate (CDOR)
Debt Instrument [Line Items]
Interest rate margin over LIBOR			2.00%
Second Amended 2017 Credit Agreement \| Secured Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 375,000,000.0
Second Amended 2017 Credit Agreement \| Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee percentage			0.375%
Third Amendment, 2017 Credit Agreement
Debt Instrument [Line Items]
Interest rate margin over LIBOR		3.50%
Covenant, liquidity level, minimum						$ 125,000,000
Third Amendment, 2017 Credit Agreement \| Debt Instrument, Redemption, Period One \| Secured Debt
Debt Instrument [Line Items]
Total indebtedness to consolidated cash flow ratio requirement						4.50
Third Amendment, 2017 Credit Agreement \| Debt Instrument, Redemption, Period Two \| Secured Debt
Debt Instrument [Line Items]
Total indebtedness to consolidated cash flow ratio requirement						4.00
Third Amendment, 2017 Credit Agreement \| Debt Instrument, Redemption, Period Three \| Secured Debt
Debt Instrument [Line Items]
Total indebtedness to consolidated cash flow ratio requirement						3.75
Third Amendment, 2017 Credit Agreement \| Canadian Dollar Offered Rate (CDOR)
Debt Instrument [Line Items]
Interest rate margin over LIBOR		2.50%
Third Amendment, 2017 Credit Agreement \| Secured Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 300,000,000.0
Third Amendment, 2017 Credit Agreement \| Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee percentage		0.625%
Standby Letters of Credit
Debt Instrument [Line Items]
Standby letters of credit outstanding, amount						$ 15,900,000	$ 15,400,000
2025 U.S. fixed rate senior secured notes at 5.500% \| Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 300,000,000		$ 1,000,000,000.0
Stated interest rate percentage	6.50%		5.50%			5.50%
Redemption price, percentage (up to)	35.00%		35.00%
Early call date, premium price, percentage	106.50%		105.50%
Redemption percentage of original face amount	100.00%		100.00%
Notes Payable due 2024
Debt Instrument [Line Items]
Debt instrument, face amount									$ 450,000,000
Stated interest rate percentage									5.375%
2027 U.S. fixed rate senior unsecured notes at 5.375%
Debt Instrument [Line Items]
Stated interest rate percentage						5.375%
2027 U.S. fixed rate senior unsecured notes at 5.375% \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount				$ 500,000,000
Stated interest rate percentage				5.375%
Redemption percentage of original face amount				100.00%
2029 Notes at 5.250%
Debt Instrument [Line Items]
Stated interest rate percentage						5.25%
2029 Notes at 5.250% \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount					$ 500,000,000
Stated interest rate percentage					5.25%
Redemption price, percentage (up to)					35.00%
Early call date, premium price, percentage					105.25%
Redemption percentage of original face amount					100.00%