Annual report pursuant to Section 13 and 15(d)

Broadcast Licenses - Results of Impairment Testing of Broadcast Licenses Under Income Approach (Detail)

v3.20.4
Broadcast Licenses - Results of Impairment Testing of Broadcast Licenses Under Income Approach (Detail)
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Dec. 31, 2020
Boston MA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate 4.80% 5.60% 14.50%
Chicago IL [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (9.00%) 8.50% 8.30%
Cleveland OH [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (18.40%) 6.50% 14.60%
Dallas TX [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate 8.50% 11.80% 7.50%
Denver CO [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     1091.00%
Dentroit MI [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     58.90%
GreenvilleSC [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     9.70%
HonoluluHI [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     12.30%
HoustonTX [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     2424.20%
Los Angles CA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     60.90%
Louisville KY [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (21.80%) 13.80% 14.60%
Nashville TN [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     436.60%
New York NY [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate 7.30% 15.90% 37.70%
Philadelphia PA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (13.10%) 5.10% 23.30%
Phoenix AZ [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     61.60%
Pittsburgh PA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     239.60%
Portland OR [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (14.80%) 10.10% 8.70%
Sacramento CA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (9.60%) 4.60% 5.10%
San Antonio TX [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     335.60%
San Diego CA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     13.60%
San Francisco CA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate 1.20% 7.00% 8.70%
Seattle WA [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     2466.50%
Tampa FL [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate (28.00%) 20.50% 60.90%
Washington DC [Member]      
Goodwill And Other Intangible Assets [Line Items]      
Excess fair value estimate     187.50%