Long-Term Debt - Additional Information (Detail) - USD ($) $ in Thousands							3 Months Ended
	May 02, 2024	Jan. 22, 2024	Jun. 12, 2023	Jun. 09, 2022	Aug. 25, 2021	Apr. 30, 2020	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Debt Instrument [Line Items]
Outstanding letters of credit							$ 17,500
Aggregate principal amount							$ 2,122,568		$ 2,125,500
Debt Instrument Redemption Period One | SOFR
Debt Instrument [Line Items]
Credit spread adjustment rate			0.11448%
Debt Instrument, Redemption, Period Two | SOFR
Debt Instrument [Line Items]
Credit spread adjustment rate			0.26161%
Debt Instrument, Redemption, Period Three | SOFR
Debt Instrument [Line Items]
Credit spread adjustment rate			0.42826%
Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Description					In addition, the Senior Secured Credit Facilities require the Company to prepay outstanding term loan borrowings, subject to certain exceptions, with:-50% (which percentage will be reduced to 25% and 0% if the Company satisfies certain net first lien leverage ratios) of annual excess cash flow, as defined under the Senior Secured Credit Facilities;-100% (which percentage will be reduced to 50% and 0% if the Company satisfies certain net first lien leverage ratios of the net cash proceeds of all non-ordinary course asset sales or other non-ordinary course dispositions of property, in each case subject to certain exceptions and reinvestment rights;-100% of the net cash proceeds of any issuance or incurrence of debt, other than proceeds from debt permitted under the Senior Secured Credit Facilities.
Letter of credit participation fees							0.125%
Cash paid for interest							$ 41,500	$ 40,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date					Aug. 15, 2029
Senior debt					$ 725,000
Debt instrument interest rate percentage					5.25%		5.25%		5.25%
Debt Instrument Redemption Description					On or after August 15, 2024, SEA may redeem the Senior Notes, in whole at any time or in part from time to time, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, if redeemed during the 12-month period commencing on August 15 of the years as follows: (i) in 2024 at 102.625%; (ii) in 2025 at 101.313%; and (iii) in 2026 and thereafter at 100%. In addition, prior to August 15, 2024, SEA may redeem the Senior Notes at its option, in whole at any time or in part from time to time, at a redemption price equal to 100% of the principal amount of the Senior Notes redeemed, plus the “Applicable Premium” and accrued and unpaid interest, if any, to, but excluding, the redemption date. Notwithstanding the foregoing, subject to the provisions set forth in the Indenture, at any time and from time to time on or prior to August 15, 2024, SEA may redeem in the aggregate up to 40% of the original aggregate principal amount of the Senior Notes (calculated after giving effect to any issuance of additional Senior Notes) in an aggregate amount equal to the net cash proceeds of one or more equity offerings at a redemption price equal to 105.250%, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. Additionally, upon the occurrence of specified change of control events, each holder will have the right to require SEA to repurchase all or any part of such holder’s notes at a purchase price in cash equal to 101%.
Interest accrue on senior notes					5.25%
Redemption percentage					100.00%
Initial aggregate principal amount, allowable redeemable percentage					40.00%
Equity offerings at redemption price					105.25%
Percentage Of notes redeemable after change of control					101.00%
Aggregate principal amount							$ 725,000		$ 725,000
Senior Notes [Member] | Debt Instrument Redemption Period One
Debt Instrument [Line Items]
Redemption percentage					102.625%
Senior Notes [Member] | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption percentage					101.313%
Senior Notes [Member] | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption percentage					100.00%
First-Priority Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date						May 01, 2025
Senior debt						$ 227,500
Debt instrument interest rate percentage						8.75%
First-Priority Senior Secured Notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Redemption of First-Priority senior secured notes	$ 227,500
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Incremental amendment to revolving facility commitments				$ 5,000
Long term debt, outstanding amount							$ 372,500
Revolving Credit Facility [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date					Aug. 25, 2026
Aggregate principal amount				$ 390,000	$ 385,000
Commitment fee payable by the company							0.50%
Restrictive Covenants [Member]
Debt Instrument [Line Items]
Total net leverage ratio not to be exceeded							425.00%
Restrictive Covenants [Member] | Debt Agreement [Member]
Debt Instrument [Line Items]
Total net leverage ratio, as calculated							257.00%
Maximum [Member] | Restrictive Covenants [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Credit facility agreement maximum required first lien secured leverage ratio							625.00%
Excludable letters of credit under maximum required first lien secured leverage ratio							$ 30,000
Minimum [Member] | Restrictive Covenants [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Credit facility agreement maximum required first lien secured leverage ratio							100.00%
Minimum percentage of funded loan and letters of credit for covenant to apply							35.00%
Restatement Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Senior secured financing							$ 1,563,000
Term B Loans [Member]
Debt Instrument [Line Items]
Aggregate principal amount									$ 1,173,000
Term B Loans [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Aug. 25, 2028
Amortization Payments of Term Loan	0.25063%
Term B Loans [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Amortization Payments of Term Loan					0.25%
Term B-2 Loans [Member]
Debt Instrument [Line Items]
Aggregate principal amount drawn		$ 1,173,000
Debt instrument, maturity date		Aug. 25, 2028
Debt Instrument Redemption Description							Borrowings under the Term B-2 Loans bear interest at a fluctuating rate per annum equal to, at SEA’s option, (i) ABR (provided that in no event shall such ABR rate with respect to the Term B-2 Loans be less than 1.50% per annum) plus an applicable margin equal to 1.50% or (ii) Adjusted Term SOFR (provided that in no event shall such Adjusted Term SOFR rate with respect to the Term B-2 Loans be less than 0.50%) plus an applicable margin equal to 2.50%
Aggregate principal amount		$ 1,173,000					$ 1,170,068
Term B-2 Loans [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Description							Borrowings under the Term B-2 Loans bear interest at a fluctuating rate per annum equal to, at the Company’s option, (i) a base rate equal to the higher of (a) the federal funds rate plus 1/2 of 1%, (b) the rate of interest quoted in the print edition of the Wall Street Journal Money Rates Section as the prime rate as in effect from time to time and (c) one-month Adjusted Term SOFR plus 1% per annum (provided that in no event shall such ABR rate with respect to the Term B-2 Loans be less than 1.50% per annum) (“ABR”), in each case, plus an applicable margin of 1.50% or (ii) an Adjusted Term SOFR rate for the applicable interest period (provided that in no event shall such Adjusted Term SOFR rate with respect to the Term B-2 Loans be less than 0.50% per annum) plus an applicable margin of 2.50%.
Revolving Loans [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Description							Borrowings under the Revolving Loans bear interest at a fluctuating rate per annum equal to, at the Company’s option, (i) ABR (provided that in no event shall such ABR rate with respect to the Revolving Loans be less than 1.00% per annum) plus an applicable margin equal to 1.75% or (ii) Adjusted Term SOFR (provided that in no event shall such Adjusted Term SOFR rate with respect to the Revolving Loans be less than 0.00%) plus an applicable margin of 2.75%. The applicable margin for borrowings of Revolving Loans are subject to one 25 basis point step-down upon achievement by the Company of certain corporate credit ratings.
Incremental Term B-2 Loans [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 380,000