Related-Party Transactions - Summary of Related-Party Balances with Univision and Other Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Trade receivables	$ 142,004	$ 71,406
Other current assets	18,021	11,557
Intangible assets subject to amortization, net	49,412	16,772
Accounts payable	126,849	53,931
Direct operating expenses	104,909	119,412	$ 125,242
Amortization	17,282	16,648	16,273
Univision
Related Party Transaction [Line Items]
Trade receivables	6,172	4,350
Intangible assets subject to amortization, net	5,869	7,098
Accounts payable	1,969	2,029
Direct operating expenses	9,063	8,194	9,254
Amortization	1,228	1,229	1,228
Other
Related Party Transaction [Line Items]
Other current assets	274	274
Accounts payable	118	118
Related Parties
Related Party Transaction [Line Items]
Trade receivables	6,172	4,350
Other current assets	274	274
Intangible assets subject to amortization, net	5,869	7,098
Accounts payable	2,087	2,147
Direct operating expenses	9,063	8,194	9,254
Amortization	$ 1,228	$ 1,229	$ 1,228

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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