Subsequent Events - Additional Information (Detail) - Subsequent Event - ION Media Stations, Inc. - KMCC-TV $ in Millions	Jan. 22, 2020 USD ($)
Subsequent Event [Line Items]
Consideration from sale of television station	$ 4.0
Discontinued operation, description	On January 22, 2020, the Company entered into an agreement with ION Media Stations, Inc. to sell television station KMCC-TV, serving the Las Vegas area, for $4.0 million. The transaction, which is subject to customary closing conditions, including the prior consent of the FCC, is currently expected to close in the first half of 2020.