Stockholders Equity [Line Items]

No definition available.

Name:	seas_StockholdersEquityLineItems
Namespace Prefix:	seas_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DividendsAxis=seas_TwoThousandFourteenQuarterFourDeclarationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=seas_TwoThousandFifteenQuarterOneDeclarationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=seas_TwoThousandFifteenQuarterTwoDeclarationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=seas_TwoThousandFifteenQuarterThreeDeclarationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stockholders' Equity - Schedule of Quarterly Cash Dividends to Common Stockholders (Detail) - $ / shares					3 Months Ended		9 Months Ended
	Sep. 16, 2015	Jun. 10, 2015	Mar. 03, 2015	Jan. 05, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Stockholders Equity [Line Items]
Cash dividends record date	Sep. 29, 2015	Jun. 22, 2015	Mar. 13, 2015	Jan. 13, 2015
Cash dividends paid date	Oct. 06, 2015	Jul. 01, 2015	Apr. 01, 2015	Jan. 22, 2015
Cash dividends declared per share	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.84	$ 0.62
Q4 2014 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date							Jan. 13, 2015
Cash dividends paid date							Jan. 22, 2015
Cash dividends declared per share							$ 0.21
Q1 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date							Mar. 13, 2015
Cash dividends paid date							Apr. 01, 2015
Cash dividends declared per share							$ 0.21
Q2 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date							Jun. 22, 2015
Cash dividends paid date							Jul. 01, 2015
Cash dividends declared per share							$ 0.21
Q3 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date							Sep. 29, 2015
Cash dividends paid date							Oct. 06, 2015
Cash dividends declared per share							$ 0.21