Consolidating Financial Information of Guarantors and Issuers (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ (60,249)	$ (83,256)
Intercompany Receivable	0	0
Intercompany payable	0	0
Net Cash Provided by (Used in) Investing Activities	(61,730)	(40,342)
Net Cash Provided by (Used in) Financing Activities	13,649	15,341
Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(17,967)	(6,307)
Intercompany Receivable	0	0
Intercompany payable	76,415	67,320
Net Cash Provided by (Used in) Investing Activities	0	(16,379)
Net Cash Provided by (Used in) Financing Activities	(62,033)	(52,314)
Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(44,980)	(26,421)
Intercompany Receivable	0	(23,497)
Intercompany payable	(47,897)	(46,917)
Net Cash Provided by (Used in) Investing Activities	(2,000)	(23,501)
Net Cash Provided by (Used in) Financing Activities	46,598	46,349
Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(6,910)	(27,243)
Intercompany Receivable	(10,594)	0
Intercompany payable	7,849	(1,201)
Net Cash Provided by (Used in) Investing Activities	(12,094)	(5,077)
Net Cash Provided by (Used in) Financing Activities	(7,849)	1,201
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	10,174	(22,382)
Intercompany Receivable	46,961	29,591
Intercompany payable	0	(13,108)
Net Cash Provided by (Used in) Investing Activities	(11,269)	10,709
Net Cash Provided by (Used in) Financing Activities	0	13,108
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(566)	(903)
Intercompany Receivable	(36,367)	(6,094)
Intercompany payable	(36,367)	(6,094)
Net Cash Provided by (Used in) Investing Activities	(36,367)	(6,094)
Net Cash Provided by (Used in) Financing Activities	36,933	6,997
Scenario, Previously Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(83,256)
Net Cash Provided by (Used in) Investing Activities		(40,342)
Net Cash Provided by (Used in) Financing Activities		15,341
Scenario, Previously Reported [Member] | Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(73,627)
Net Cash Provided by (Used in) Investing Activities		(16,379)
Net Cash Provided by (Used in) Financing Activities		15,006
Scenario, Previously Reported [Member] | Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(3,001)
Net Cash Provided by (Used in) Investing Activities		(4)
Net Cash Provided by (Used in) Financing Activities		(568)
Scenario, Previously Reported [Member] | Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(26,042)
Net Cash Provided by (Used in) Investing Activities		(5,077)
Net Cash Provided by (Used in) Financing Activities		0
Scenario, Previously Reported [Member] | Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		20,317
Net Cash Provided by (Used in) Investing Activities		(18,882)
Net Cash Provided by (Used in) Financing Activities		0
Scenario, Previously Reported [Member] | Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(903)
Net Cash Provided by (Used in) Investing Activities		0
Net Cash Provided by (Used in) Financing Activities		903
Scenario, Adjustment [Member]
Condensed Financial Statements, Captions [Line Items]
Intercompany Receivable		0
Intercompany payable		0
Intercompany Receivable Investing		0
Intercompany Activity, Net, Financing Activities		0
Scenario, Adjustment [Member] | Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
Intercompany Receivable		0
Intercompany payable		(67,320)
Intercompany Receivable Investing		0
Intercompany Activity, Net, Financing Activities		(67,320)
Scenario, Adjustment [Member] | Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]
Condensed Financial Statements, Captions [Line Items]
Intercompany Receivable		23,497
Intercompany payable		46,917
Intercompany Receivable Investing		(23,497)
Intercompany Activity, Net, Financing Activities		46,917
Scenario, Adjustment [Member] | Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
Intercompany Receivable		0
Intercompany payable		1,201
Intercompany Receivable Investing		0
Intercompany Activity, Net, Financing Activities		1,201
Scenario, Adjustment [Member] | Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Intercompany Receivable		(29,591)
Intercompany payable		13,108
Intercompany Receivable Investing		29,591
Intercompany Activity, Net, Financing Activities		13,108
Scenario, Adjustment [Member] | Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Intercompany Receivable		6,094
Intercompany payable		6,094
Intercompany Receivable Investing		(6,094)
Intercompany Activity, Net, Financing Activities		6,094
Scenario, Actual [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(83,256)
Net Cash Provided by (Used in) Investing Activities		(40,342)
Net Cash Provided by (Used in) Financing Activities		15,341
Scenario, Actual [Member] | Cedar Fair L.P. (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(6,307)
Net Cash Provided by (Used in) Investing Activities		(16,379)
Net Cash Provided by (Used in) Financing Activities		(52,314)
Scenario, Actual [Member] | Guarantor Subsidiaries Co Issuer Subsidiary Magnum [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(26,421)
Net Cash Provided by (Used in) Investing Activities		(23,501)
Net Cash Provided by (Used in) Financing Activities		46,349
Scenario, Actual [Member] | Co-Issuer Subsidiary (Cedar Canada) [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(27,243)
Net Cash Provided by (Used in) Investing Activities		(5,077)
Net Cash Provided by (Used in) Financing Activities		1,201
Scenario, Actual [Member] | Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(22,382)
Net Cash Provided by (Used in) Investing Activities		10,709
Net Cash Provided by (Used in) Financing Activities		13,108
Scenario, Actual [Member] | Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities		(903)
Net Cash Provided by (Used in) Investing Activities		(6,094)
Net Cash Provided by (Used in) Financing Activities		$ 6,997
Senior Unsecured Notes [Member] | Notes Payable Due 2021 and 2024 [Member]
Condensed Financial Statements, Captions [Line Items]
Subsidiary Ownership Percentage Guaranteering Notes	100.00%
Subsidiary Guarantor Ownership Percentage	100.00%