Consolidating Financial Information of Guarantors and Issuers Cash Flows (Details) (USD $) In Thousands	6 Months Ended	12 Months Ended
Jun. 26, 2011	Jun. 27, 2010	Jun. 26, 2011	Jun. 27, 2010
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	$ 25,863	$ (1,643)	$ 209,622	$ 167,666
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	0	0	0	0
Sale of Canadian real estate	0	0	0	53,831
Capital expenditures	(51,685)	(53,261)	(70,130)	(81,929)
Net cash from (for) investing activities	(51,685)	(53,261)	(70,130)	(28,098)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	61,800	110,700	(112,000)	61,200
Term debt borrowings	22,938	0	1,197,938	0
Note borrowings	0	0	399,383	0
Intercompany term debt (payments) receipts			0	0
Term debt payments, including early termination penalties	(2,950)	(43,886)	(1,525,954)	(174,886)
Distributions (paid) received	(9,962)	0	(23,796)	(27,604)
Return of capital			0	0
Payment of debt issuance costs	(20,488)	0	(63,754)	(7,694)
Exercise of limited partnership unit options	0	0	7	0
Net cash from (for) financing activities	51,338	66,814	(128,176)	(148,984)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	398	92	433	1,364
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	25,914	12,002	11,749	(8,052)
Balance, beginning of period	9,765	11,928	23,930	31,982
Balance, end of period	35,679	23,930	35,679	23,930
Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(77,878)	(61,354)	67,360	141,927
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	61,587	9,506	65,266	(33,632)
Sale of Canadian real estate				0
Capital expenditures	(29,264)	(17,316)	(38,113)	(22,260)
Net cash from (for) investing activities	32,323	(7,810)	27,153	(55,892)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	61,800	110,700	(112,000)	61,200
Term debt borrowings	13,246		693,247
Note borrowings			0
Intercompany term debt (payments) receipts			697,813	7,250
Term debt payments, including early termination penalties	(1,707)	(43,349)	(1,309,822)	(119,010)
Intercompany (payments) receipts	0	1,813
Distributions (paid) received	(10,001)		(23,892)	(27,781)
Return of capital			0	0
Payment of debt issuance costs	(11,783)		(33,859)	(7,694)
Exercise of limited partnership unit options			0
Net cash from (for) financing activities	51,555	69,164	(88,513)	(86,035)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	6,000	0	6,000	0
Balance, beginning of period	0	0	0	0
Balance, end of period	6,000	0	6,000	0
Co-Issuer Subsidiary (Magnum) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	(33,953)	(30,137)	(64,269)	20,669
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	34,906	34,059	221,687	(34,976)
Sale of Canadian real estate				0
Capital expenditures	0	0	0	0
Net cash from (for) investing activities	34,906	34,059	221,687	(34,976)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Term debt borrowings	9,358		489,357
Note borrowings			0
Intercompany term debt (payments) receipts			(695,063)	(4,500)
Term debt payments, including early termination penalties	(1,205)	0	(8,532)	0
Intercompany (payments) receipts	688	(1,125)
Distributions (paid) received	39		96	177
Return of capital			75,247	18,718
Payment of debt issuance costs	(8,332)		(19,608)	0
Exercise of limited partnership unit options			7
Net cash from (for) financing activities	548	(1,125)	(158,496)	14,395
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0	0	0
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	1,501	2,797	(1,078)	88
Balance, beginning of period	1,461	1,243	4,040	3,952
Balance, end of period	2,962	4,040	2,962	4,040
Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	11,033	(1,951)	9,335	15,290
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	(1,312)	0	(114,484)	0
Sale of Canadian real estate				53,831
Capital expenditures	(7,083)	(4,238)	(10,278)	(4,762)
Net cash from (for) investing activities	(8,395)	(4,238)	(124,762)	49,069
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Term debt borrowings	334		15,334
Note borrowings			399,383
Intercompany term debt (payments) receipts			0	0
Term debt payments, including early termination penalties	(38)	(537)	(207,600)	(55,876)
Intercompany (payments) receipts	0	0
Distributions (paid) received	0		0	0
Return of capital			(75,247)	(18,718)
Payment of debt issuance costs	(373)		(10,287)	0
Exercise of limited partnership unit options			0
Net cash from (for) financing activities	(77)	(537)	121,583	(74,594)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	398	92	433	1,364
CASH AND CASH EQUIVALENTS
Net increase (decrease) for the period	2,959	(6,634)	6,589	(8,871)
Balance, beginning of period	6,943	9,947	3,313	12,184
Balance, end of period	9,902	3,313	9,902	3,313
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	4,911	48,610	(1,945)	111,017
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	26,569	(376)	26,672	(52,629)
Sale of Canadian real estate				0
Capital expenditures	(15,338)	(31,707)	(21,739)	(54,907)
Net cash from (for) investing activities	11,231	(32,083)	4,933	(107,536)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Term debt borrowings	0		0
Note borrowings			0
Intercompany term debt (payments) receipts			(2,750)	(2,750)
Term debt payments, including early termination penalties	0	0	0	0
Intercompany (payments) receipts	(688)	(688)
Distributions (paid) received	0		0	0
Return of capital			0	0
Payment of debt issuance costs	0		0	0
Exercise of limited partnership unit options			0
Net cash from (for) financing activities	(688)	(688)	(2,750)	(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	15,454	15,839	238	731
Balance, beginning of period	1,361	738	16,577	15,846
Balance, end of period	16,815	16,577	16,815	16,577
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
NET CASH (FOR) FROM OPERATING ACTIVITIES	121,750	43,189	199,141	(121,237)
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES
Investment in joint ventures and affiliates	(121,750)	(43,189)	(199,141)	121,237
Sale of Canadian real estate				0
Capital expenditures	0	0	0	0
Net cash from (for) investing activities	(121,750)	(43,189)	(199,141)	121,237
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES
Net borrowings on revolving credit loans	0	0	0	0
Term debt borrowings	0		0
Note borrowings			0
Intercompany term debt (payments) receipts			0	0
Term debt payments, including early termination penalties	0	0	0	0
Intercompany (payments) receipts	0	0
Distributions (paid) received	0		0	0
Return of capital			0	0
Payment of debt issuance costs	0		0	0
Exercise of limited partnership unit options			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	0	0	0	0
Balance, beginning of period	0	0	0	0
Balance, end of period	$ 0	$ 0	$ 0	$ 0

Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7
-Footnote 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 8, 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016