Represents the number of distinct obligations within the international agreements.

No definition available.

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Data Type:	xbrli:integerItemType
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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ContractWithCustomerDurationAxis=us-gaap_ShortTermContractWithCustomerMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=six_ThemeParkFoodMerchandiseAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_ProductOrServiceAxis=six_SponsorshipInternationalAgreementsAndAccommodationsMember
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Revenue - Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($)	Jan. 01, 2020 USD ($)	Jan. 01, 2019 USD ($)
Revenue
Revenues	$ 19,143	$ 477,210	$ 121,646	$ 605,403
Number of distinct obligations within international agreements \| item	3		3
Long-term contracts
Revenue
Revenues	$ 356	57,062	$ 16,208	84,590
Contract with customer, liability					$ 85,100	$ 100,800
Contract with customer, liability, revenue recognized	4,000	41,200	19,600	62,800
Short-term contracts and other
Revenue
Revenues	18,787	420,148	105,438	520,813
Park admissions
Revenue
Revenues	10,962	252,508	70,768	318,588
Park admissions \| Long-term contracts
Revenue
Revenues	(3,061)	23,700	2,701	31,543
Park admissions \| Short-term contracts and other
Revenue
Revenues	14,023	228,808	68,067	287,045
Park food, merchandise and other
Revenue
Revenues	4,523	191,655	34,329	230,633
Park food, merchandise and other \| Long-term contracts
Revenue
Revenues	(163)	5,901	657	7,614
Park food, merchandise and other \| Short-term contracts and other
Revenue
Revenues	4,686	185,754	33,672	223,019
Sponsorship international agreements and accommodations
Revenue
Revenues	3,658	33,047	16,549	56,182
Sponsorship international agreements and accommodations \| Long-term contracts
Revenue
Revenues	3,580	27,461	12,850	45,433
Sponsorship international agreements and accommodations \| Short-term contracts and other
Revenue
Revenues	$ 78	$ 5,586	$ 3,699	$ 10,749