Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Property and Equipment - Summary of Categories of Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 230,502 $ 226,523
Less accumulated depreciation (185,127) (180,336)
Property, Plant and Equipment Net 45,375 46,187
Property, Plant and Equipment, Net, Total 78,425 79,122
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 27,040 30,254
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 28,567 28,922
Office Furnishings and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 36,592 36,875
Antennae, Towers and Transmitting Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 77,543 78,057
Studio, Production and Mobile Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 29,333 29,023
Computer Software and Website Development Costs [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 38,272 33,928
Record and Tape Libraries [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total   17
Automobiles [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 1,492 1,514
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 18,703 18,187
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 6,010 $ 2,681