Summary of Significant Accounting Policies Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2018	May 31, 2017
Noncontrolling Interest [Line Items]
Beginning balance	$ 30,680	$ 32,921
Net income (loss)	(754)	(839)
Distributions to noncontrolling interests	(1,721)	(1,072)
Ending balance	29,713	32,688
Austin Radio Partnership [Member]
Noncontrolling Interest [Line Items]
Beginning balance	47,424	46,830
Net income (loss)	(1,372)	1,598
Distributions to noncontrolling interests	(1,721)	(1,072)
Ending balance	47,075	47,356
Digonex [Member]
Noncontrolling Interest [Line Items]
Beginning balance	(16,744)	(13,909)
Net income (loss)	618	759
Distributions to noncontrolling interests		0
Ending balance	$ (17,362)	$ (14,668)