Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($) Business Segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents settlement terms	less than four days
Cash and cash equivalents	$ 433,909,000	$ 39,946,000
Allowance on installment arrangements of accounts receivable	6,700,000	12,100,000
Reduction to deferred revenue	6,700,000	12,100,000
Interest capitalized	6,300,000	4,600,000	$ 4,200,000
Capitalized Computer Software, Net	2,400,000	4,200,000
Capitalized Computer Software, Accumulated Amortization	11,200,000	9,500,000
Capitalized Computer Software, Amortization	1,700,000	2,200,000	3,700,000
Goodwill Impairment	0
Self-insurance reserves	31,100,000	31,700,000
Revenue and related expense for bartered ticket transactions	$ 4,700,000	16,200,000	16,600,000
Lease initial or expected term	12 months
Number of theme parks owned and operated | Business	12
Number of reportable segment | Segment	1
Selling, General and Administrative Expenses [Member]
Summary Of Significant Accounting Policies [Line Items]
Other advertising and media costs	$ 48,100,000	138,300,000	$ 127,500,000
Accrued Salaries, Wages and Benefits [Member]
Summary Of Significant Accounting Policies [Line Items]
Self-insurance reserves	1,800,000	2,800,000
Other Accrued Liabilities [Member]
Summary Of Significant Accounting Policies [Line Items]
Self-insurance reserves	$ 7,500,000	7,500,000
Computer System Development Costs [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
FDIC insured amount	$ 250,000
Extend or renewal lease term	10 years
Maximum [Member] | Animals [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	50 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Extend or renewal lease term	1 year
Minimum | Animals [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	1 year
Amounts Due from Third-Party Credit Card Companies [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 4,900,000	$ 9,700,000