Segment Information - Narrative (Details)	Mar. 31, 2017 radio_station customer affiliate market
Segment Reporting Information [Line Items]
Number of major customers customers | customer	0
Percentage of revenue by major customer	10.00%
Television
Segment Reporting Information [Line Items]
Percentage of market capture	18.00%
Television | ABC affiliates
Segment Reporting Information [Line Items]
Number of affiliates	15
Television | NBC affiliates
Segment Reporting Information [Line Items]
Number of affiliates	5
Television | FOX affiliates
Segment Reporting Information [Line Items]
Number of affiliates	2
Television | CBS affiliates
Segment Reporting Information [Line Items]
Number of affiliates	2
Television | My TV Affiliates
Segment Reporting Information [Line Items]
Number of affiliates	2
Television | CW affiliate
Segment Reporting Information [Line Items]
Number of affiliates	1
Television | Independent station
Segment Reporting Information [Line Items]
Number of affiliates	1
Television | Azteca America affiliates
Segment Reporting Information [Line Items]
Number of affiliates	4
Radio
Segment Reporting Information [Line Items]
Number of radio stations | radio_station	34
Number of markets in which the company operates | market	8
Radio | Radio - FM
Segment Reporting Information [Line Items]
Number of radio stations | radio_station	28
Radio | Radio - AM
Segment Reporting Information [Line Items]
Number of radio stations | radio_station	6