Summary of Significant Accounting Policies Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Noncontrolling Interest [Line Items]
Beginning balance			$ 30,680	$ 32,921
Net Income (Loss) Attributable to Noncontrolling Interest	$ 837	$ 711	2,396	2,358
Distributions to noncontrolling interests			(3,792)	(3,556)
Ending balance	29,284	31,723	29,284	31,723
Austin Radio Partnership [Member]
Noncontrolling Interest [Line Items]
Beginning balance			47,424	46,830
Net Income (Loss) Attributable to Noncontrolling Interest			4,132	(4,602)
Distributions to noncontrolling interests			(3,792)	(3,556)
Ending balance	47,764	47,876	47,764	47,876
Digonex [Member]
Noncontrolling Interest [Line Items]
Beginning balance			(16,744)	(13,909)
Net Income (Loss) Attributable to Noncontrolling Interest			(1,736)	(2,244)
Distributions to noncontrolling interests			0	0
Ending balance	$ (18,480)	$ (16,153)	$ (18,480)	$ (16,153)