Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0
Other intangible assets not subject to amortization	200,000	$ 300,000
Amortization expense, including impairment charges	5,600,000	$ 3,400,000	$ 5,400,000
Amortization expense for the remainder of fiscal year 2017	7,200,000
Amortization expense for fiscal year 2018	6,900,000
Amortization expense for fiscal year 2019	6,000,000
Amortization expense for fiscal year 2020	5,800,000
Amortization expense for fiscal year 2021	5,300,000
Amortization expense thereafter	$ 8,000,000