Consolidating Financial Information of Guarantors and Issuers Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013	Mar. 31, 2013
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	$ 52,237	$ 82,556	$ 294,284	$ 302,706
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
INtercompany Receivable	0	0	0	0
Proceeds from Sales of Assets, Investing Activities	1,377	0	16,674	14,885
Capital expenditures	(106,690)	(79,189)	(147,848)	(108,995)
Net cash for investing activities	(105,313)	(79,189)	(131,174)	(94,110)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Proceeds from (Repayments of) Other Long-term Debt	39,000	58,000	(19,000)	(53,000)
Term debt borrowings	0	630,000	0	630,000
Note borrowings	450,000	500,000	450,000	500,000
Repayments of Notes Payable	(426,148)	0	(426,148)	0
Repayments of Related Party Debt				0
Repayments of Long-term Debt	0	(1,132,675)	(9,575)	(1,141,675)
Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties				0
Payments of Distributions to Affiliates	(78,275)	(69,639)	(152,094)	(114,093)
Intercompany payable	0	0	0	0
Excess tax benefit from unit-based compensation	(725)	(130)	260	1,517
Payments of Debt Issuance Costs	(9,795)	(22,764)	(10,280)	(22,758)
Exercise of limited partnership unit options	0	28	24	57
Net cash for financing activities	(25,943)	(37,180)	(166,813)	(199,952)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1,097	(1,389)	209	(945)
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(77,922)	(35,202)	(3,494)	7,699
Balance, beginning of period	118,056	78,830	43,628	35,929	43,628
Balance, end of period	40,134	43,628	40,134	43,628	43,628
Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	57,348	34,874	184,623	190,494
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
INtercompany Receivable	0	0	0	0
Proceeds from Sales of Assets, Investing Activities	0		0	0
Capital expenditures	(47,494)	(38,398)	(65,349)	(47,797)
Net cash for investing activities	(47,494)	(38,398)	(65,349)	(47,797)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Proceeds from (Repayments of) Other Long-term Debt	39,000	58,000	(19,000)	(53,000)
Term debt borrowings		359,022		359,022
Note borrowings	0	294,897	0	294,897
Repayments of Notes Payable	0		0
Repayments of Related Party Debt				0
Repayments of Long-term Debt		(655,723)	(5,457)	(660,931)
Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties				0
Payments of Distributions to Affiliates	(79,544)	(71,350)	(154,847)	(115,839)
Intercompany payable	(44,310)	7,990	60,253	47,465
Excess tax benefit from unit-based compensation	0	0	0	0
Payments of Debt Issuance Costs	0	(14,312)	(223)	(14,311)
Exercise of limited partnership unit options		0	0	0
Net cash for financing activities	(84,854)	(21,476)	(119,274)	(142,697)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(75,000)	(25,000)	0	0
Balance, beginning of period	75,000	25,000	0	0
Balance, end of period	0	0	0	0
Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(48,952)	(8,162)	(16,592)	(48,744)
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
INtercompany Receivable	7,625	13,869	37,779	(43,948)
Proceeds from Sales of Assets, Investing Activities	0		0	0
Capital expenditures	(193)	0	(193)	(8)
Net cash for investing activities	7,432	13,869	37,586	42,406
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Proceeds from (Repayments of) Other Long-term Debt	0	0	0	0
Term debt borrowings		256,500		256,500
Note borrowings	0	205,103	0	205,103
Repayments of Notes Payable	0		0
Repayments of Related Party Debt				0
Repayments of Long-term Debt		(462,438)	(3,898)	(466,114)
Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties				86,362
Payments of Distributions to Affiliates	0	1,711	0	1,746
Intercompany payable	38,101	1,089	(17,224)	15,543
Excess tax benefit from unit-based compensation	(725)	(130)	260	1,517
Payments of Debt Issuance Costs	0	(8,014)	(156)	(8,014)
Exercise of limited partnership unit options		28	24	57
Net cash for financing activities	37,376	(6,151)	(20,994)	6,338
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(4,144)	(444)	0	0
Balance, beginning of period	4,144	444	0	0
Balance, end of period	0	0	0	0
Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(22,362)	(6,326)	(1,723)	27,790
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
INtercompany Receivable	0	0	0	0
Proceeds from Sales of Assets, Investing Activities	0		0	0
Capital expenditures	(11,573)	(3,435)	(17,667)	(4,404)
Net cash for investing activities	(11,573)	(3,435)	(17,667)	(4,404)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Proceeds from (Repayments of) Other Long-term Debt	0	0	0	0
Term debt borrowings		14,478		14,478
Note borrowings	450,000	0	450,000	0
Repayments of Notes Payable	(426,148)		(426,148)
Repayments of Related Party Debt				0
Repayments of Long-term Debt		(14,514)	(220)	(14,630)
Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties				0
Payments of Distributions to Affiliates	0	(13,173)	0	(13,173)
Intercompany payable	2,631	(3,631)	3,130	(912)
Excess tax benefit from unit-based compensation	0	0	0	0
Payments of Debt Issuance Costs	(9,795)	(438)	(9,901)	(433)
Exercise of limited partnership unit options		0	0	0
Net cash for financing activities	16,688	(17,278)	16,861	(14,670)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1,097	(1,389)	209	(945)
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(16,150)	(28,428)	(2,320)	7,771
Balance, beginning of period	35,575	50,173	21,745	13,974
Balance, end of period	19,425	21,745	19,425	21,745
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	76,734	81,364	133,985	146,839
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
INtercompany Receivable	3,829	(5,384)	(45,923)	(62,033)
Proceeds from Sales of Assets, Investing Activities	1,377		16,674	14,885
Capital expenditures	(47,430)	(37,356)	(64,639)	(56,786)
Net cash for investing activities	(42,224)	(42,740)	(93,888)	(103,934)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Proceeds from (Repayments of) Other Long-term Debt	0	0	0	0
Term debt borrowings		0		0
Note borrowings	0	0	0	0
Repayments of Notes Payable	0		0
Repayments of Related Party Debt				(86,362)
Repayments of Long-term Debt		0	0	0
Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties				0
Payments of Distributions to Affiliates	0	0	0	0
Intercompany payable	(7,861)	(13,933)	(38,015)	43,885
Excess tax benefit from unit-based compensation	0	0	0	0
Payments of Debt Issuance Costs	0	0	0	0
Exercise of limited partnership unit options		0	0	0
Net cash for financing activities	(7,861)	(13,933)	(38,015)	(42,477)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	26,649	24,691	2,082	428
Balance, beginning of period	3,337	3,213	27,904	27,476
Balance, end of period	29,986	27,904	29,986	27,904
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(10,531)	(19,194)	(6,009)	(13,673)
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
INtercompany Receivable	(11,454)	(8,485)	8,144	105,981
Proceeds from Sales of Assets, Investing Activities	0		0	0
Capital expenditures	0	0	0	0
Net cash for investing activities	(11,454)	(8,485)	8,144	19,619
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Proceeds from (Repayments of) Other Long-term Debt	0	0	0	0
Term debt borrowings		0		0
Note borrowings	0	0	0	0
Repayments of Notes Payable	0		0
Repayments of Related Party Debt				86,362
Repayments of Long-term Debt		0	0	0
Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties				(86,362)
Payments of Distributions to Affiliates	1,269	13,173	2,753	13,173
Intercompany payable	11,439	8,485	(8,144)	(105,981)
Excess tax benefit from unit-based compensation	0	0	0	0
Payments of Debt Issuance Costs	0	0	0	0
Exercise of limited partnership unit options		0	0	0
Net cash for financing activities	12,708	21,658	(5,391)	(6,446)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(9,277)	(6,021)	(3,256)	(500)
Balance, beginning of period	0	0	(6,021)	(5,521)	(6,021)
Balance, end of period	$ (9,277)	$ (6,021)	$ (9,277)	$ (6,021)	$ (6,021)