Intangible Assets and Goodwill - Additional Information (Detail) $ in Thousands	12 Months Ended
	Feb. 28, 2018 USD ($) multiple	Feb. 28, 2017 USD ($)	Feb. 29, 2016 USD ($)	Jun. 16, 2014 USD ($)
Intangible Assets And Goodwill [Line Items]
Purchases		$ 34
Amortization of Intangible Assets	$ 300	700
Indefinite-lived intangibles	$ 170,890	197,666	$ 205,129
FCC license term	8 years
Goodwill impairment testing, period of average income used in test	2 years
Impairment losses on intangible assets	$ 265	9,843	9,499
Goodwill, Impairment	265	2,058
Goodwill	4,338	4,603
Maximum
Intangible Assets And Goodwill [Line Items]
Amortization of Intangible Assets			1,500
Patents
Intangible Assets And Goodwill [Line Items]
Impairment losses on intangible assets	900	3,400
Goodwill | Digonex
Intangible Assets And Goodwill [Line Items]
Impairment losses on intangible assets	2,100	700
Radio
Intangible Assets And Goodwill [Line Items]
Impairment losses on intangible assets	$ 265	6,855	5,440
Radio | Minimum
Intangible Assets And Goodwill [Line Items]
Goodwill impairment testing, market multiple used in test calculation | multiple	8.0
Publishing
Intangible Assets And Goodwill [Line Items]
Impairment losses on intangible assets		0	0
Digonex
Intangible Assets And Goodwill [Line Items]
Goodwill				$ 2,800
Indianapolis Cluster
Intangible Assets And Goodwill [Line Items]
Indefinite-lived intangibles	$ 18,166	$ 18,166	$ 18,166