Summary of Significant Accounting Policies Additional Information (Details) $ in Millions	3 Months Ended
	May 31, 2018 USD ($)
Noncontrolling Interest [Line Items]
Local programming and marketing agreement fee	$ 0.7
Austin Radio Partnership [Member]
Noncontrolling Interest [Line Items]
Percentage Of Controlling Interest	50.10%
Digonex [Member]
Noncontrolling Interest [Line Items]
Percentage Of Controlling Interest	83.00%