Consolidating Financial Information of Guarantors and Issuers Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jul. 01, 2012	Jun. 26, 2011	Jul. 01, 2012	Jun. 26, 2011
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	$ 64,605	$ 25,863	$ 256,915	$ 209,622
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	0	0	0	0
Proceeds from Sale of Other Assets	1,173	0	1,173	0
Capital expenditures	(64,880)	(51,685)	(103,385)	(70,130)
Net cash from (for) investing activities	(63,707)	(51,685)	(102,212)	(70,130)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	111,000	61,800	26,000	(112,000)
Derivative settlement			(50,450)
Term debt borrowings	0	22,938	0	1,197,938
Note borrowings	0	0	0	399,383
Intercompany term debt (payments) receipts		0	0	0
Term debt payments, including early termination penalties	(16,000)	(2,950)	(36,950)	(1,525,954)
Intercompany (payments) receipts	0
Distributions (paid) received	(44,358)	(9,962)	(89,742)	(23,796)
Return of capital				0
Capital (contribution) infusion	0		0
Payment of debt issuance costs	0	(20,488)	(723)	(63,754)
Exercise of limited partnership unit options	47	0	53	7
Excess tax benefit from unit-based compensation	(438)	0	(438)	0
Net cash from (for) financing activities	(199)	51,338	(152,250)	(128,176)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(294)	398	(2,203)	433
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	405	25,914	250	11,749
Balance, beginning of period	35,524	9,765	35,679	23,930
Balance, end of period	35,929	35,679	35,929	35,679
Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(75,820)	(77,878)	152,063	67,360
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	41,622	61,587	(36,990)	65,266
Capital expenditures	(24,266)	(29,264)	(36,852)	(38,113)
Net cash from (for) investing activities	18,529	32,323	(72,669)	27,153
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	111,000	61,800	26,000	(112,000)
Derivative settlement	0		0
Term debt borrowings		13,246		693,247
Note borrowings				0
Intercompany term debt (payments) receipts		0	0	697,813
Term debt payments, including early termination penalties		1,707	(21,383)	(1,309,822)
Intercompany (payments) receipts	0
Distributions (paid) received	(44,450)	(10,001)	(90,011)	(23,892)
Return of capital				0
Capital (contribution) infusion	0		0
Payment of debt issuance costs		(11,783)	0	(33,859)
Exercise of limited partnership unit options	0		0	0
Excess tax benefit from unit-based compensation	0		0
Net cash from (for) financing activities	57,291	51,555	(85,394)	(88,513)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	0	6,000	(6,000)	6,000
Balance, beginning of period	0	0	6,000	0
Balance, end of period	0	6,000	0	6,000
Co-Issuer Subsidiary (Magnum) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	47,048	(33,953)	(68,520)	(64,269)
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	11,793	34,906	(42,370)	221,687
Capital expenditures	0	0	0	0
Net cash from (for) investing activities	11,793	34,906	(42,370)	221,687
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Derivative settlement	0		0
Term debt borrowings		9,358		489,357
Note borrowings				0
Intercompany term debt (payments) receipts		688	183,138	(695,063)
Term debt payments, including early termination penalties		1,205	(15,094)	(8,532)
Intercompany (payments) receipts	7,482
Distributions (paid) received	92	39	269	96
Return of capital				75,247
Capital (contribution) infusion	60,000		(60,000)
Payment of debt issuance costs		(8,332)	0	(19,608)
Exercise of limited partnership unit options	47		53	7
Excess tax benefit from unit-based compensation	(438)		(438)
Net cash from (for) financing activities	(59,353)	548	107,928	(158,496)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(512)	1,501	(2,962)	(1,078)
Balance, beginning of period	512	1,461	2,962	4,040
Balance, end of period	0	2,962	0	2,962
Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(12,898)	11,033	27,791	9,335
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	(241)	(1,312)	(4,038)	(114,484)
Capital expenditures	(13,478)	(7,083)	(25,832)	(10,278)
Net cash from (for) investing activities	(13,719)	(8,395)	(29,870)	(124,762)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Derivative settlement	(50,450)		(50,450)
Term debt borrowings		334		15,334
Note borrowings				399,383
Intercompany term debt (payments) receipts		0	0	0
Term debt payments, including early termination penalties		38	(473)	(207,600)
Intercompany (payments) receipts	0
Distributions (paid) received	0	0	0	0
Return of capital				(75,247)
Capital (contribution) infusion	(60,000)		60,000
Payment of debt issuance costs		(373)	(723)	(10,287)
Exercise of limited partnership unit options	0		0	0
Excess tax benefit from unit-based compensation	0		0
Net cash from (for) financing activities	9,345	(77)	8,354	121,583
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(294)	398	(2,203)	433
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(17,566)	2,959	4,072	6,589
Balance, beginning of period	31,540	6,943	9,902	3,313
Balance, end of period	13,974	9,902	13,974	9,902
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	44,464	4,911	226,860	(1,945)
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	14,158	26,569	7,640	26,672
Capital expenditures	(27,136)	(15,338)	(40,701)	(21,739)
Net cash from (for) investing activities	(12,978)	11,231	(33,061)	4,933
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Derivative settlement	0		0
Term debt borrowings		0		0
Note borrowings				0
Intercompany term debt (payments) receipts		(688)	(183,138)	(2,750)
Term debt payments, including early termination penalties		0	0	0
Intercompany (payments) receipts	(7,482)
Distributions (paid) received	0	0	0	0
Return of capital				0
Capital (contribution) infusion	0		0
Payment of debt issuance costs		0	0	0
Exercise of limited partnership unit options	0		0	0
Excess tax benefit from unit-based compensation	0		0
Net cash from (for) financing activities	(7,482)	(688)	(183,138)	(2,750)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	24,004	15,454	10,661	238
Balance, beginning of period	3,472	1,361	16,815	16,577
Balance, end of period	27,476	16,815	27,476	16,815
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	61,811	121,750	(81,279)	199,141
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	(67,332)	(121,750)	75,758	(199,141)
Capital expenditures	0	0	0	0
Net cash from (for) investing activities	(67,332)	(121,750)	75,758	(199,141)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Derivative settlement	0		0
Term debt borrowings		0		0
Note borrowings				0
Intercompany term debt (payments) receipts		0	0	0
Term debt payments, including early termination penalties		0	0	0
Intercompany (payments) receipts	0
Distributions (paid) received	0	0	0	0
Return of capital				0
Capital (contribution) infusion	0		0
Payment of debt issuance costs		0	0	0
Exercise of limited partnership unit options	0		0	0
Excess tax benefit from unit-based compensation	0
Net cash from (for) financing activities	0	0	0	0
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	(5,521)	0	(5,521)	0
Balance, beginning of period	0	0	0	0
Balance, end of period	$ (5,521)	$ 0	$ (5,521)	$ 0