Property and Equipment - Additional Information (Detail) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2020
USD ($)
Station
|
Dec. 31, 2019
USD ($)
|
Dec. 31, 2018
USD ($)
|
|
Property, Plant and Equipment [Line Items] | |||
Depreciation expense | $ 13.3 | $ 10.6 | $ 10.1 |
FCC | |||
Property, Plant and Equipment [Line Items] | |||
Number of stations assigned to new channels | Station | 17 | ||
Estimated reimbursable cost | $ 16.0 | ||
Gains on involuntary conversion associated with repack process | $ 5.9 | $ 6.0 |