[Line Items] for Schedule of Stock Repurchase Plans [Table]

No definition available.

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- Definition

Represents the average price at which shares are repurchased and retired during the period.

+ References

No definition available.

+ Details

Name:	six_StockRepurchasedAndRetiredAveragePricePerShare
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Data Type:	num:perShareItemType
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Period Type:	duration

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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

- Definition

Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

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

- Details

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- Details

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- Details

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Stock Repurchase Plans (Details) - USD ($) $ / shares in Units, shares in Thousands		6 Months Ended		32 Months Ended
	Nov. 20, 2013	Jun. 30, 2016	Jun. 30, 2015	Jul. 22, 2016	Jun. 07, 2016
Schedule of Stock Repurchase Plans [Line Items]
Value of shares repurchased		$ 44,091,000	$ 21,236,000
November 2013 Stock Repurchase Plan [Member]
Schedule of Stock Repurchase Plans [Line Items]
Amount of shares authorized to be repurchased under Stock Repurchase Program	$ 500,000,000.0
Stock Repurchase Program, Period in Force	4 years
November 2013 Stock Repurchase Plan [Member] \| Subsequent Event [Member]
Schedule of Stock Repurchase Plans [Line Items]
Total number of shares purchased				11,253
Value of shares repurchased				$ 490,100,000
Average price paid per share (in dollars per share)				$ 43.56
Permitted dollar value of repurchases remaining				$ 9,900,000
June 2016 Stock Repurchase Plan [Member]
Schedule of Stock Repurchase Plans [Line Items]
Amount of shares authorized to be repurchased under Stock Repurchase Program					$ 500,000,000.0