Immaterial Correction of an Error (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Balance Sheet
Deferred income taxes	$ 145,830				$ 72,557				$ 145,830		$ 72,557
Total noncurrent liabilities	1,580,098				1,547,921				1,580,098		1,547,921
Total liabilities	1,796,908				1,729,784				1,796,908		1,729,784
Retained earnings	(438,825)				27,775				(438,825)		27,775
Accumulated other comprehensive loss, net of tax	(32,697)				(49,101)				(32,697)		(49,101)		(49,912)		(4,192)
Total Six Flags Entertainment Corporation stockholders' equity	373,337				884,732				373,337		884,732
Total equity	373,337				888,666				373,337		888,666		767,148		868,163
Statement of Operations
Income tax expense (benefit)									47,601		(184,154)		(8,065)
Income from continuing operations before discontinued operations									156,324		395,766		11,944
Net income									156,873		403,039		13,145
Net income (loss) attributable to Six Flags Entertainment Corporation	13,315	120,403	47,361	(62,527)	155,754	253,025	72,265	(115,109)	118,552		365,935		(22,660)
Income (loss) from continuing operations									118,003		358,662		(23,861)
Income from discontinued operations									549		7,273		1,201
Income (loss) from continuing operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)									$ 1.21		$ 3.33	[1]	$ (0.22)	[1]
Income from discontinued operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)									$ 0.01		$ 0.07	[1]	$ 0.01	[1]
Net income (loss) attributable to Six Flags Entertainment Corporation common stockholders (usd per share)	$ 0.14	$ 1.27	$ 0.49	$ (0.61)	$ 1.46	$ 2.37	$ 0.67	$ (1.05)	$ 1.22		$ 3.40	[1]	$ (0.21)	[1]
Income (loss) from continuing operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)									$ 1.17		$ 3.23	[1]	$ (0.22)	[1]
Income from discontinued operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)									$ 0.01		$ 0.07	[1]	$ 0.01	[1]
Net income (loss) attributable to Six Flags Entertainment Corporation common stockholders (usd per share)	$ 0.13	$ 1.22	$ 0.47	$ (0.61)	$ 1.40	$ 2.23	$ 0.64	$ (1.05)	$ 1.18		$ 3.30	[1]	$ (0.21)	[1]
Statement of Comprehensive Income
Net income									156,873		403,039		13,145
Foreign currency translation adjustment									(1,341)	[2]	4,516	[2]	(9,154)
Defined benefit retirement plan									17,427	[3]	(3,204)	[3]	(36,566)
Change in cash flow hedging									318	[4]	(501)	[4]	0
Net other comprehensive income, net of tax									16,404		811		(45,720)
Comprehensive income									173,277		403,850		(32,575)
Comprehensive income attributable to Six Flags Entertainment Corporation									134,956		366,746		(68,380)
Statement of Cash Flows
Net income									156,873		403,039		13,145
Deferred income tax expense (benefit)									34,915		(194,167)		(14,701)
As Reported
Balance Sheet
Deferred income taxes					65,070						65,070
Total noncurrent liabilities					1,540,434						1,540,434
Total liabilities					1,722,297						1,722,297
Retained earnings					15,849						15,849
Accumulated other comprehensive loss, net of tax					(29,688)						(29,688)
Total Six Flags Entertainment Corporation stockholders' equity					892,219						892,219
Total equity					896,153						896,153
Statement of Operations
Income tax expense (benefit)											(172,228)
Income from continuing operations before discontinued operations											383,840
Net income											391,113
Net income (loss) attributable to Six Flags Entertainment Corporation											354,009
Income (loss) from continuing operations											346,736
Income from discontinued operations											7,273
Income (loss) from continuing operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 3.22	[1]
Income from discontinued operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.07	[1]
Net income (loss) attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 3.29	[1]
Income (loss) from continuing operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 3.12
Income from discontinued operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.07
Net income (loss) attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 3.19	[1]
Statement of Comprehensive Income
Net income											391,113
Foreign currency translation adjustment											6,835	[2]
Defined benefit retirement plan											13,890	[3]
Change in cash flow hedging											(501)
Net other comprehensive income, net of tax											20,224
Comprehensive income											411,337
Comprehensive income attributable to Six Flags Entertainment Corporation											374,233
Statement of Cash Flows
Net income											391,113
Deferred income tax expense (benefit)											(182,241)
Adjustments
Balance Sheet
Deferred income taxes					7,487						7,487
Total noncurrent liabilities					7,487						7,487
Total liabilities					7,487						7,487
Retained earnings					11,926						11,926
Accumulated other comprehensive loss, net of tax					(19,413)						(19,413)
Total Six Flags Entertainment Corporation stockholders' equity					(7,487)						(7,487)
Total equity					(7,487)						(7,487)
Statement of Operations
Income tax expense (benefit)											(11,926)
Income from continuing operations before discontinued operations											11,926
Net income											11,926
Net income (loss) attributable to Six Flags Entertainment Corporation											11,926
Income (loss) from continuing operations											11,926
Income from discontinued operations											0
Income (loss) from continuing operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.11	[1]
Income from discontinued operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.00	[1]
Net income (loss) attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.11	[1]
Income (loss) from continuing operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.11
Income from discontinued operations attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.00
Net income (loss) attributable to Six Flags Entertainment Corporation common stockholders (usd per share)											$ 0.11	[1]
Statement of Comprehensive Income
Net income											11,926
Foreign currency translation adjustment											(2,319)	[2]
Defined benefit retirement plan											(17,094)	[3]
Change in cash flow hedging											0
Net other comprehensive income, net of tax											(19,413)
Comprehensive income											(7,487)
Comprehensive income attributable to Six Flags Entertainment Corporation											(7,487)
Statement of Cash Flows
Net income											11,926
Deferred income tax expense (benefit)											$ (11,926)

[1] All 2011 and 2012 share and per share amounts have been retroactively adjusted to reflect Holdings' two-for-one stock split in June 2013, as described in Note 12 to the Consolidated Financial Statements.

[2] Foreign currency translation adjustment presented net of tax benefit of $0.7 million and net of tax expense of $2.4 million for the years ended December 31, 2013 and 2012, respectively.

[3] Defined benefit retirement plan is presented net of tax expense of $11.5 million and net of tax benefit of $2.1 million for the years ended December 31, 2013 and 2012, respectively.

[4] Change in cash flow hedging is reported net of tax expense of $0.2 million and net of tax benefit of $0.3 million for the years ended December 31, 2013 and 2012, respectively.