Leases - Additional Information (Detail) $ in Thousands		12 Months Ended
	Feb. 15, 2022 ft²	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Lessee Lease Description [Line Items]
Remaining term description of leases		The Company’s existing leases have remaining terms of less than one year up to 29 years.
Non-cancelable operating lease expiration term		2026-12
Weighted average remaining lease term		9 years 9 months 18 days	9 years 10 months 24 days
Weighted average discount rate		6.30%	6.30%
Lease cost		$ 11,478	$ 11,411	$ 12,878
Direct Operating Expenses
Lessee Lease Description [Line Items]
Lease cost		6,100	5,900	6,100
Selling, General and Administrative Expenses
Lessee Lease Description [Line Items]
Lease cost		4,800	4,700	6,000
Corporate Expenses
Lessee Lease Description [Line Items]
Lease cost		$ 600	$ 800	$ 800
Santa Monica
Lessee Lease Description [Line Items]
Area under operating leases for corporate headquarters | ft²		16,000
Santa Monica | Subsequent Event
Lessee Lease Description [Line Items]
Area under operating leases for corporate headquarters | ft²	37,506
Operating lease amended date	Feb. 15, 2022
Operating lease extended expire date	Jan. 31, 2034
Los Angeles
Lessee Lease Description [Line Items]
Area under operating leases for corporate headquarters | ft²		41,000
Lease termination date		Sep. 30, 2022
Facilities and Broadcast Equipment
Lessee Lease Description [Line Items]
Non-cancelable operating lease expiration term		2050-11
Maximum
Lessee Lease Description [Line Items]
Remaining term of leases		29 years