Goodwill and Intangible Assets - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2019	Feb. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	9 years 9 months 18 days	10 years
Gross Carrying Amount	$ 99,576	$ 97,759
Accumulated Amortization	38,391	36,487
Amortized intangible assets, Net	$ 61,185	$ 61,272
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	13 years 3 months 18 days	13 years 9 months 18 days
Gross Carrying Amount	$ 25,281	$ 24,385
Accumulated Amortization	4,346	3,906
Amortized intangible assets, Net	$ 20,935	$ 20,479
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	8 years	8 years 2 months 12 days
Gross Carrying Amount	$ 72,765	$ 71,869
Accumulated Amortization	32,907	31,498
Amortized intangible assets, Net	$ 39,858	$ 40,371
Non-Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life (in years)	2 years 4 months 24 days	2 years 6 months
Gross Carrying Amount	$ 747	$ 722
Accumulated Amortization	355	300
Amortized intangible assets, Net	392	422
Patent [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	783	783
Accumulated Amortization	$ 783	$ 783