Equity-Based Compensation - Schedule of Employee Stock Performance Activity (Omnibus Plan 2.75x Performance Restricted Shares) (Detail) (Omnibus Incentive Plan [Member], 2.75x Performance Restricted Shares [Member], USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Omnibus Incentive Plan [Member] \| 2.75x Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding shares, Beginning balance	163,310
Granted shares	0		0
Vested shares	0	0	0
Forfeited shares	(2,392)
Outstanding shares, Ending balance	160,918	163,310
Weighted Average Grant Date Fair Value per Share, outstanding shares, Beginning balance (in USD per share)	$ 23.05
Granted (in USD per share)	$ 0	$ 23.05
Vested (in USD per share)	$ 0
Forfeited (in USD per share)	$ 23.05
Weighted Average Grant Date Fair Value per Share, outstanding shares, Ending balance (in USD per share)	$ 18.32	$ 23.05

Equity-Based Compensation - Schedule of Employee Stock Performance Activity (Omnibus Plan 2.75x Performance Restricted Shares) (Detail) (Omnibus Incentive Plan [Member], 2.75x Performance Restricted Shares [Member], USD $)

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Omnibus Incentive Plan [Member] | 2.75x Performance Restricted Shares [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Outstanding shares, Beginning balance

163,310us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
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= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
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= seas_OmnibusIncentivePlanMember

Granted shares

0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Vested shares

0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Forfeited shares

(2,392)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
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= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Outstanding shares, Ending balance

160,918us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Weighted Average Grant Date Fair Value per Share, outstanding shares, Beginning balance (in USD per share)

$ 23.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Granted (in USD per share)

$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

$ 23.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Vested (in USD per share)

$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Forfeited (in USD per share)

$ 23.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

Weighted Average Grant Date Fair Value per Share, outstanding shares, Ending balance (in USD per share)

$ 18.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seas_TwoPointSevenFivePerformanceRestrictedSharesMember
/ us-gaap_PlanNameAxis
= seas_OmnibusIncentivePlanMember

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Period Type:	instant

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Period Type:	duration

- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Details

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