Depreciation and Amortization - Depreciation and Amortization Expense Excluded from Operating Expenses in its Condensed Consolidated Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 73,125	$ 68,627
Direct advertising expenses
Property, Plant and Equipment [Line Items]
Depreciation and amortization	68,316	64,237
General and administrative expenses
Property, Plant and Equipment [Line Items]
Depreciation and amortization	1,280	1,176
Corporate expenses
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 3,529	$ 3,214