Segment Information - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2022 Unit Country Station	Mar. 31, 2021	Dec. 31, 2021 Segment
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			3
Number of business units | Unit	4
Percentage of revenue generated from outside the United States	73.00%	65.00%
Digital
Segment Reporting Information [Line Items]
Number of countries in operation | Country	30
Television
Segment Reporting Information [Line Items]
Number of stations owned	49
Audio
Segment Reporting Information [Line Items]
Number of stations owned	46