Commitments and Contingencies (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended		1 Months Ended		6 Months Ended	1 Months Ended		6 Months Ended
	Jun. 30, 2013 park	Dec. 31, 2012	Apr. 01, 1998	Dec. 31, 2011 Term Loan B	May 31, 2012 Six Flags Over Georgia (SFOG)	Jun. 30, 2013 Six Flags Over Georgia (SFOG) multiplier	May 31, 2013 Six Flags Over Texas (SFOT)	May 31, 2012 Six Flags Over Texas (SFOT)	Jun. 30, 2013 Six Flags Over Texas (SFOT) multiplier	Jun. 30, 2013 Obligations guaranteed of general partner	Jun. 30, 2013 Obligations guaranteed of general partner Minimum	Jun. 30, 2013 Obligations guaranteed of subsidiaries
Details of commitments and contingencies
Acquisition of capital stock of the former Six Flags Entertainment Corporation, paid in cash			$ 976.0
Annual distributions by general partners to limited partners in partnership parks											66.3
Share of Partnership Parks' annual distributions paid to Six Flags Entertainment Corporation										28.8
Rolling period for making minimum capital expenditure at each of the Partnership Parks										5 years
Percentage of capital expenditures to Partnership Parks' revenues										6.00%
Weighted average period of the park's EBITDA for calculation of value of purchase price												4 years
Specified multiple for purchase price valuation (in multipliers)						8.0			8.5
Specified price for purchase of partnership parks						250.0			374.8
Limited partner interests owned (as a percent)						30.50%			53.10%
Remaining redeemable units (as a percent)						69.50%			46.90%
Current redemption value for limited partnership units	357.3
Maximum unit purchase obligation for 2014	357.3
Units purchased in partnership parks (in shares)					0.79		0.18	0.05
Units purchased pursuant to annual offer					2.0		0.3
Accordion feature available for borrowing for future put obligations				300
Capital expenditures incurred on parks		6.2
Estimated capital expenditures on partnership parks current season	21.4
Number of partnerships (in parks)	2
Cash generated from operating activities by partnerships, after deduction of capital expenditures and excluding the impact of short-term intercompany advances		52.8
Total loans receivable from the partnerships that own partnership parks	$ 239.3	$ 239.3