Summary of Significant Accounting Policies - Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Aug. 31, 2019	May 31, 2019	Aug. 31, 2018	May 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Noncontrolling Interest [Line Items]
Beginning balance		$ 28,153		$ 30,680	$ 28,153	$ 30,680
Net Income (Loss) Attributable to Noncontrolling Interest	$ 832		$ 805		1,678	1,559
Distributions to noncontrolling interests	(824)	(1,121)	(1,003)	(1,721)	(1,945)	(2,724)
Ending balance	27,886		29,515		27,886	29,515
Austin Radio Partnership
Noncontrolling Interest [Line Items]
Beginning balance		47,146		47,424	47,146	47,424
Net Income (Loss) Attributable to Noncontrolling Interest					2,679	2,743
Distributions to noncontrolling interests					(1,945)	(2,724)
Ending balance	47,880		47,443		47,880	47,443
Digonex [Member]
Noncontrolling Interest [Line Items]
Beginning balance		$ (18,993)		$ (16,744)	(18,993)	(16,744)
Net Income (Loss) Attributable to Noncontrolling Interest					(1,001)	(1,184)
Ending balance	$ (19,994)		$ (17,928)		$ (19,994)	$ (17,928)