Goodwill and Intangible Assets - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Aug. 31, 2017	Feb. 28, 2017
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	11 years 2 months 12 days	8 years 9 months 18 days
Gross Carrying Amount	$ 78,623	$ 61,947
Accumulated Amortization	26,388	23,311
Amortized intangible assets, Net	$ 52,235	$ 38,636
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	16 years 4 months 24 days	8 years
Gross Carrying Amount	$ 19,625	$ 3,642
Accumulated Amortization	1,809	1,234
Amortized intangible assets, Net	$ 17,816	$ 2,408
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	8 years 6 months	8 years 10 months 25 days
Gross Carrying Amount	$ 58,040	$ 57,347
Accumulated Amortization	23,742	21,336
Amortized intangible assets, Net	$ 34,298	$ 36,011
Noncompete [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	3 months 19 days	9 months 18 days
Gross Carrying Amount	$ 175	$ 175
Accumulated Amortization	116	86
Amortized intangible assets, Net	$ 59	$ 89
Patent [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	6 months	1 year
Gross Carrying Amount	$ 783	$ 783
Accumulated Amortization	721	655
Amortized intangible assets, Net	$ 62	$ 128