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Goodwill and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Life (in years) 7 years 1 month 6 days 6 years 2 months 12 days
Gross Carrying Amount $ 72,214 $ 39,894
Accumulated Amortization 23,337 19,121
Amortized intangible assets, net 48,877 20,773
Trade names [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Life (in years)      
Gross Carrying Amount 1,234 1,234
Accumulated Amortization 1,234 1,234
Amortized intangible assets, net      
Customer lists [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Life (in years) 7 years 1 month 6 days 6 years 4 months 24 days
Gross Carrying Amount 70,207 37,887
Accumulated Amortization 21,840 17,753
Amortized intangible assets, net 48,367 20,134
Patent [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Life (in years) 4 years 5 years
Gross Carrying Amount 773 773
Accumulated Amortization 263 134
Amortized intangible assets, net $ 510 $ 639