Recent Accounting Pronouncements - Additional Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($)
ASU 2018-02 [Member] \| Gains (Losses) on Cash Flow Hedges [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from accumulated other comprehensive income to accumulated deficit	$ 1.1

Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act.

No definition available.

Name:	seas_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect
Namespace Prefix:	seas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration