Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019
Condensed Consolidated Statements of Comprehensive (Loss) Income
Net (loss) income	$ (95,528)		$ 200,209		$ (296,324)		$ 230,973
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	1,831	[1]	(1,466)	[1]	(10,706)	[2]	249	[2]
Defined benefit retirement plan	177	[3]	151	[3]	563	[4]	440	[4]
Change in cash flow hedging	(37)	[5]	(2,268)	[5]	(12,597)	[6]	(4,409)	[6]
Other comprehensive income (loss), net of tax	1,971		(3,583)		(22,740)		(3,720)
Comprehensive (loss) income	(93,557)		196,626		(319,064)		227,253
Less: Comprehensive income attributable to noncontrolling interests	(20,644)		(20,376)		(41,288)		(40,753)
Comprehensive (loss) income attributable to Six Flags Entertainment Corporation	$ (114,201)		$ 176,250		$ (360,352)		$ 186,500

[1] Foreign currency translation adjustment is presented net of tax expense of $0.5 million for the three months ended September 30, 2020 and a tax benefit of $0.4 million for the three months ended September 30, 2019.

[2] Foreign currency translation adjustment is presented net of tax benefit of $2.8 million for the nine months ended September 30, 2020 and tax expense of $0.1 million for the nine months ended September 30, 2019, respectively.

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

[4] Defined benefit retirement plan is presented net of tax expense of $0.2 million and $0.1 million for the nine months ended September 30, 2020 and September 30, 2019, respectively.

[5] Change in fair value of cash flow hedging is presented net of nominal tax benefit for the three months ended September 30, 2020 and net of tax benefit $0.8 million for the three months ended September 30, 2019, respectively.

[6] Change in fair value of cash flow hedging is presented net of tax benefit of $4.1 million and $1.5 million for the nine months ended September 30, 2020 and September 30, 2019, respectively.