Employee Benefits - Additional Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Retirement savings plans Nexstar [Member] | |||
Employee Benefits [Line Items] | |||
Contributions by employer | $ 1.6 | $ 1.3 | $ 1.0 |