Depreciation and Amortization - Depreciation and Amortization Expense Excluded from Operating Expenses in its Consolidated Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Depreciation and Amortization Expense [Line Items]
Depreciation and amortization	$ 349,449	$ 271,294	$ 251,296
Direct advertising expenses
Depreciation and Amortization Expense [Line Items]
Depreciation and amortization	330,357	253,850	236,054
General and administrative expenses
Depreciation and Amortization Expense [Line Items]
Depreciation and amortization	5,242	4,691	4,996
Corporate expenses
Depreciation and Amortization Expense [Line Items]
Depreciation and amortization	$ 13,850	$ 12,753	$ 10,246