Summary of Significant Accounting Policies - Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Noncontrolling Interest [Line Items]
Beginning balance	$ 30,680	$ 32,921
Net Income (Loss) Attributable to Noncontrolling Interest	2,727	2,630	$ 101
Distributions to noncontrolling interests	(5,254)	(4,871)	(5,577)
Ending balance	28,153	30,680	32,921
Austin Radio Partnership
Noncontrolling Interest [Line Items]
Beginning balance	47,424	46,830
Net Income (Loss) Attributable to Noncontrolling Interest	4,976	5,465
Distributions to noncontrolling interests	(5,254)	(4,871)
Ending balance	47,146	47,424	46,830
Digonex
Noncontrolling Interest [Line Items]
Beginning balance	(16,744)	(13,909)
Net Income (Loss) Attributable to Noncontrolling Interest	(2,249)	(2,835)
Distributions to noncontrolling interests		0
Ending balance	$ (18,993)	$ (16,744)	$ (13,909)