Revenues - Summary of Disaggregation of Broadcast Advertising Revenue by Sales Channel (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
Disaggregation Of Revenue [Line Items] | ||
Total revenue | $ 37,709 | $ 42,788 |
Local Direct | ||
Disaggregation Of Revenue [Line Items] | ||
Total revenue | 14,593 | 16,503 |
Local Agency | ||
Disaggregation Of Revenue [Line Items] | ||
Total revenue | 6,916 | 7,403 |
National Agency | ||
Disaggregation Of Revenue [Line Items] | ||
Total revenue | $ 16,200 | $ 18,882 |