Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Property and Equipment - Summary of Categories of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 267,350 $ 264,200
Less accumulated depreciation (170,842) (164,720)
Property, Plant and Equipment, Net, Total 96,508 99,480
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 31,822 32,320
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 30,104 28,962
Office Furnishings and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 36,791 37,583
Office Furnishings and Equipment Under Capital Lease Obligations [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 215 244
Antennae, Towers and Transmitting Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 85,998 85,632
Antennae Towers and Transmitting Equipment Under Capital Lease Obligations [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total   795
Studio, Production and Mobile Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 29,040 29,697
Computer Software and Website Development Costs [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 27,603 24,477
Record and Tape Libraries [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 17 27
Automobiles [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 1,570 1,385
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 19,357 19,003
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 4,833 $ 4,075