Related-Party Transactions - Summary of Related-Party Balances with Univision and Other Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Trade receivables	$ 79,308	$ 84,348
Other current assets	10,672	6,260
Intangible assets subject to amortization, net	22,598	26,758
Accounts payable	51,034	61,847
Direct operating expenses	125,242	119,283	$ 113,439
Amortization	16,273	16,411	15,342
Univision
Related Party Transaction [Line Items]
Trade receivables	4,530	4,653
Intangible assets subject to amortization, net	8,327	9,555
Accounts payable	1,830	2,430
Direct operating expenses	9,254	9,494	10,302
Amortization	1,228	2,043	2,320
Other
Related Party Transaction [Line Items]
Other current assets	274	274
Accounts payable	118	118
Related Parties
Related Party Transaction [Line Items]
Trade receivables	4,530	4,653
Other current assets	274	274
Intangible assets subject to amortization, net	8,327	9,555
Accounts payable	1,948	2,548
Direct operating expenses	9,254	9,494	10,302
Amortization	$ 1,228	$ 2,043	$ 2,320

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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