Subsequent Events - Additional Information (Details) - USD ($) $ in Thousands		2 Months Ended	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2018	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Subsequent Event [Line Items]
Gain on sale of radio and publishing assets, net of disposition costs			$ 76,604	$ 23,557	$ 0
LMA fees			$ 10,752	$ 10,331	$ 10,331
St Louis | Subsequent Event [Member]
Subsequent Event [Line Items]
Net Proceeds from Divestiture of Businesses	$ 40,500
Gain on sale of radio and publishing assets, net of disposition costs	29,900
LMA fees		$ 700
Gross Proceeds from Divestiture of Business	60,000
Business Divestiture Disposition Costs	$ 15,900