Consolidating Financial Information of Guarantors and Issuers Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended			3 Months Ended	6 Months Ended	12 Months Ended				3 Months Ended	6 Months Ended	12 Months Ended				3 Months Ended	6 Months Ended	12 Months Ended				3 Months Ended	6 Months Ended	12 Months Ended				3 Months Ended	6 Months Ended	12 Months Ended
	Feb. 26, 2012	Jun. 30, 2013	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012	Mar. 25, 2012	Jun. 30, 2013 Cedar Fair L.P. (Parent) [Member]	Jul. 01, 2012 Cedar Fair L.P. (Parent) [Member]	Jun. 30, 2013 Cedar Fair L.P. (Parent) [Member]	Mar. 25, 2012 Cedar Fair L.P. (Parent) [Member]	Dec. 31, 2012 Cedar Fair L.P. (Parent) [Member]	Jun. 26, 2011 Cedar Fair L.P. (Parent) [Member]	Jun. 30, 2013 Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]	Jul. 01, 2012 Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]	Jun. 30, 2013 Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]	Mar. 25, 2012 Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]	Dec. 31, 2012 Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]	Jun. 26, 2011 Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]	Jun. 30, 2013 Co-Issuer Subsidiary (Cedar Canada) [Member]	Jul. 01, 2012 Co-Issuer Subsidiary (Cedar Canada) [Member]	Jun. 30, 2013 Co-Issuer Subsidiary (Cedar Canada) [Member]	Mar. 25, 2012 Co-Issuer Subsidiary (Cedar Canada) [Member]	Dec. 31, 2012 Co-Issuer Subsidiary (Cedar Canada) [Member]	Jun. 26, 2011 Co-Issuer Subsidiary (Cedar Canada) [Member]	Jun. 30, 2013 Guarantor Subsidiaries [Member]	Jul. 01, 2012 Guarantor Subsidiaries [Member]	Jun. 30, 2013 Guarantor Subsidiaries [Member]	Mar. 25, 2012 Guarantor Subsidiaries [Member]	Dec. 31, 2012 Guarantor Subsidiaries [Member]	Jun. 26, 2011 Guarantor Subsidiaries [Member]	Jun. 30, 2013 Eliminations [Member]	Jul. 01, 2012 Eliminations [Member]	Jun. 30, 2013 Eliminations [Member]	Mar. 25, 2012 Eliminations [Member]	Dec. 31, 2012 Eliminations [Member]	Jun. 26, 2011 Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES		$ 82,556	$ 82,556	$ 64,605	$ 302,706	$ 256,915	$ 256,915	$ 4,808	$ (75,559)	$ 210,085	$ 146,874			$ (30,371)	$ 47,309	$ (47,009)	$ (73,709)			$ (4,856)	$ (12,724)	$ 29,440	$ 24,332			$ 44,138	$ 44,638	$ 140,865	$ 223,401			$ 68,837	$ 60,941	$ (30,675)	$ (63,983)
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates		0		0	0		0	38,056	41,361	27,874	(31,801)			37,167	11,532	(30,140)	(37,181)			(18,274)	(415)	(15,735)	(579)			17,909	13,984	(12,174)	11,099			(74,858)	(66,462)	30,175	58,462
Sale of other assets			0	1,173	14,885	1,173	(1,173)		1,173	0	(1,173)				0	0	0				0	0	0				0	14,885	0				0	0	0
Capital expenditures		(79,189)	(79,189)	(64,880)	(108,995)	(103,385)	(103,385)	(38,398)	(24,266)	(47,797)	(36,852)			0	0	(8)	0			(3,435)	(13,478)	(4,404)	(25,832)			(37,356)	(27,136)	(56,786)	(40,701)			0	0	0	0
Net cash for investing activities		(79,189)	(79,189)	(63,707)	(94,110)	(102,212)	(102,212)	(342)	18,268	(19,923)	(67,480)			37,167	11,532	(30,148)	(37,181)			(21,709)	(13,893)	(20,139)	(26,411)			(19,447)	(13,152)	(54,075)	(29,602)			(74,858)	(66,462)	30,175	58,462
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings (payments) on revolving credit loans		58,000	58,000	111,000	(53,000)	26,000	26,000	58,000	111,000	(53,000)	26,000			0	0	0	0			0	0	0	0			0	0	0	0			0	0	0	0
Term debt borrowings		630,000	630,000	0	630,000	0		359,022		359,022				256,500		256,500				14,478		14,478				0		0				0		0
Note borrowings		500,000	500,000	0	500,000	0		294,897		294,897				205,103		205,103				0		0				0		0				0		0
Derivative settlement	(50,450)		0	(50,450)	0	(50,450)	(50,450)		0		0				0		0				(50,450)		(50,450)				0		0				0		0
Repayments of Long-term Debt		(1,132,675)	(1,132,675)	(16,000)	(1,141,675)	(36,950)	(36,950)	(655,723)	(9,259)	(660,931)	(21,383)			(462,438)	(6,536)	(466,114)	(15,094)			(14,514)	(205)	(14,630)	(473)			0	0	0	0			0	0	0	0
Intercompany term debt (payments) receipts				0	0		0		0	0	0				7,482	86,362	183,138				0	0	0				(7,482)	(86,362)	(183,138)				0	0	0
Distributions (paid) received		(69,639)	(69,639)	(44,358)	(114,093)	(89,742)	(89,742)	(71,350)	(44,450)	(115,839)	(90,011)			1,711	92	1,746	269			0	0	0	0			0	0	0	0			0	0	0	0
Capital (contribution) infusion				0			0		0		0				(60,000)		(60,000)				60,000		60,000				0		0				0		0
Payments of Debt Issuance Costs		22,764	22,764	0	22,758	723	723	14,312		14,311	0			8,014		8,014	0			438		433	723			0		0	0			0		0	0
Exercise of limited partnership unit options		28	28	47	57	53	53	0	0	0	0			28	47	57	53			0	0	0	0			0	0	0	0			0	0	0	0
Excess tax benefit from unit-based compensation		(130)	(130)	(438)	1,517	(438)	(438)	0	0	0	0			(130)	(438)	1,517	(438)			0	0	0	0			0	0	0	0			0	0	0	0
Net cash for financing activities		(37,180)	(37,180)	(199)	(199,952)	(152,250)	(152,250)	(29,466)	57,291	(190,162)	(85,394)			(7,240)	(59,353)	77,157	107,928			(474)	9,345	(585)	8,354			0	(7,482)	(86,362)	(183,138)			0	0	0	0
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		(1,389)	(1,389)	(294)	(945)	(2,203)	(2,203)	0	0	0	0			0	0	0	0			(1,389)	(294)	(945)	(2,203)			0	0	0	0			0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period		(35,202)	(35,202)	405	7,699	250	250	(25,000)	0	0	(6,000)			(444)	(512)	0	(2,962)			(28,428)	(17,566)	7,771	4,072			24,691	24,004	428	10,661			(6,021)	(5,521)	(500)	(5,521)
Balance, beginning of period			78,830	35,524	35,929	35,679			0	0		25,000	6,000		512	0		444	2,962		31,540	13,974		50,173	9,902		3,472	27,476		3,213	16,815		0	(5,521)		0	0
Balance, end of period		$ 43,628	$ 43,628	$ 35,929	$ 43,628	$ 35,929		$ 0	$ 0	$ 0		$ 25,000	$ 6,000	$ 0	$ 0	$ 0		$ 444	$ 2,962	$ 21,745	$ 13,974	$ 21,745		$ 50,173	$ 9,902	$ 27,904	$ 27,476	$ 27,904		$ 3,213	$ 16,815	$ (6,021)	$ (5,521)	$ (6,021)		$ 0	$ 0