Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2020		Jun. 30, 2019
Condensed Consolidated Statements of Comprehensive (Loss) Income
Net (loss) income	$ (116,250)		$ 99,896		$ (200,796)		$ 30,764
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	1,661	[1]	626	[1]	(12,537)	[2]	1,715	[2]
Defined benefit retirement plan	193	[3]	146	[3]	386	[4]	289	[4]
Change in cash flow hedging	9,148	[5]	(2,141)	[5]	(12,560)	[6]	(2,141)	[6]
Other comprehensive income (loss), net of tax	11,002		(1,369)		(24,711)		(137)
Comprehensive (loss) income	(105,248)		98,527		(225,507)		30,627
Less: Comprehensive income attributable to noncontrolling interests	(20,644)		(20,377)		(20,644)		(20,377)
Comprehensive (loss) income attributable to Six Flags Entertainment Corporation	$ (125,892)		$ 78,150		$ (246,151)		$ 10,250

[1] Foreign currency translation adjustment is presented net of tax expense of $0.4 million and $0.2 million for the three months ended June 30, 2020 and June 30, 2019, respectively.

[2] Foreign currency translation adjustment is presented net of tax benefit of $3.3 million for the three months ended June 30, 2020 and tax expense of $0.5 million for the six months ended June 30, 2019, respectively.

[3] Defined benefit retirement plan is presented net of tax expense of $0.1 million for the three months ended June 30, 2020 and net of nominal tax expense for the three months ended June 30, 2019, respectively.

[4] Defined benefit retirement plan is presented net of tax expense of $0.1 million for the six months ended June 30, 2020 and June 30, 2019.

[5] Change in fair value of cash flow hedging is presented net of tax expense of $3.0 million for the three months ended June 30, 2020 and net of tax benefit $0.7 million for the three months ended June 30, 2019, respectively.

[6] Change in fair value of cash flow hedging is presented net of tax benefit of $4.2 million and $0.7 million for the six months ended June 30, 2020 and June 30, 2019.