Summary of Significant Accounting Policies Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Noncontrolling Interest [Line Items]
Beginning balance			$ 32,921	$ 38,397
Net income (loss)	$ (808)	$ 733	(1,647)	104
Distributions to noncontrolling interests			(2,254)	(2,074)
Ending balance	32,314	36,219	32,314	36,219
Austin Radio Partnership [Member]
Noncontrolling Interest [Line Items]
Beginning balance			46,830	47,556
Net income (loss)			(3,151)	3,048
Distributions to noncontrolling interests			(2,254)	(2,074)
Ending balance	47,727	48,530	47,727	48,530
Digonex [Member]
Noncontrolling Interest [Line Items]
Beginning balance			(13,909)	(9,159)
Net income (loss)			1,504	3,152
Distributions to noncontrolling interests			0	0
Ending balance	$ (15,413)	$ (12,311)	$ (15,413)	$ (12,311)