Segment Information - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021 Station Segment Market	Jun. 30, 2020
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			3
Percentage of revenue generated from outside the United States	70.00%	18.00%	67.00%	15.00%
Television
Segment Reporting Information [Line Items]
Number of stations owned			54
Radio
Segment Reporting Information [Line Items]
Number of stations owned			48
Advertisements and Syndicates Radio Programming | Minimum
Segment Reporting Information [Line Items]
Number of markets owned | Market			100