Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Summary of Categories of Property and Equipment (Detail)

v3.20.4
Property and Equipment - Summary of Categories of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 259,458 $ 260,795
Less accumulated depreciation (180,336) (173,122)
Property, Plant and Equipment, Net, Total 79,122 87,673
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 30,254 30,936
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 28,922 30,283
Office Furnishings and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 36,875 36,855
Antennae, Towers and Transmitting Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 78,057 78,312
Studio, Production and Mobile Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 29,023 30,164
Computer Software and Website Development Costs [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 33,928 29,595
Record and Tape Libraries [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 17 17
Automobiles [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 1,514 1,509
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 18,187 18,834
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 2,681 $ 4,290