Goodwill and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	8 years 8 months 12 days	9 years 6 months
Gross Carrying Amount	$ 77,610	$ 76,752
Accumulated Amortization	35,138	29,116
Amortized intangible assets, Net	$ 42,472	$ 47,636
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	0 years	0 years
Gross Carrying Amount	$ 1,234	$ 1,234
Accumulated Amortization	$ 1,234	$ 1,234
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	8 years 8 months 12 days	9 years 7 months 6 days
Gross Carrying Amount	$ 75,518	$ 74,670
Accumulated Amortization	33,353	27,486
Amortized intangible assets, Net	$ 42,165	$ 47,184
Noncompete [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	1 year 9 months 18 days	2 years 9 months 18 days
Gross Carrying Amount	$ 75	$ 75
Accumulated Amortization	29	4
Amortized intangible assets, Net	$ 46	$ 71
Patent [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	2 years	3 years
Gross Carrying Amount	$ 783	$ 773
Accumulated Amortization	522	392
Amortized intangible assets, Net	$ 261	$ 381