Intangible Assets and Goodwill - Additional Interim Impairment Assessments (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment losses on intangible assets	$ 67,915	$ 0	$ 11,419
Goodwill
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment losses on intangible assets	58,400
Interim Assessment | Fcc Licenses
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment losses on intangible assets			10,971
Scenario Four [Member] | Fcc Licenses
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment losses on intangible assets	9,520
Scenario Four [Member] | Goodwill
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment losses on intangible assets	$ 58,395		$ 448