Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plan - Schedule of Stock-Based Compensation Expense Recognized (Detail)

v3.21.2
Stock Incentive Plan - Schedule of Stock-Based Compensation Expense Recognized (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Total stock-based compensation expense, pre-tax $ 84 $ 96 $ 162 $ 199
Tax expense for stock-based compensation expense (22) (25) (42) (52)
Total stock-based compensation expense, net of tax 62 71 120 147
Unallocated Corporate [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock option compensation expense 24 43 52 93
Broadcast [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock option compensation expense 33 37 61 74
Digital Media [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock option compensation expense $ 27 $ 16 $ 49 31
Publishing [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock option compensation expense       $ 1