Segment Information - Narrative (Details)	Sep. 30, 2019 affiliate low_power_station
Segment Reporting Information [Line Items]
Number of low power stations operated | low_power_station	9
Local Media | ABC affiliates
Segment Reporting Information [Line Items]
Number of affiliates	18
Local Media | NBC affiliates
Segment Reporting Information [Line Items]
Number of affiliates	11
Local Media | CBS affiliates
Segment Reporting Information [Line Items]
Number of affiliates	9
Local Media | FOX affiliates
Segment Reporting Information [Line Items]
Number of affiliates	4
Local Media | My TV Affiliates
Segment Reporting Information [Line Items]
Number of affiliates	2
Local Media | CW affiliate
Segment Reporting Information [Line Items]
Number of affiliates	5
Local Media | Independent station
Segment Reporting Information [Line Items]
Number of affiliates	2