Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012	Feb. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of asset			7 years 2 months 12 days		6 years 2 months 12 days
Amortization of trade names, customer lists, and patent	$ 1,225,000	$ 823,000	$ 2,815,000	$ 2,483,000
Goodwill acquired adjustment					200,000
Goodwill acquired			23,864,000		175,000
WISCO and NIC [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill acquired			$ 23,864,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of asset			1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of asset			10 years