Summary of Significant Accounting Policies Additional Information (Details) $ in Millions	6 Months Ended
	Aug. 31, 2017 USD ($)
Noncontrolling Interest [Line Items]
Local programming and marketing agreement fee	$ 0.4
Austin Radio Partnership [Member]
Noncontrolling Interest [Line Items]
Percentage Of Controlling Interest	50.10%
Digonex [Member]
Noncontrolling Interest [Line Items]
Percentage Of Controlling Interest	82.00%