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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
6 Months Ended 12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Feb. 29, 2016
Finite-Lived Intangible Assets [Line Items]      
Estimated useful life of asset 9 years   8 years 8 months 12 days
Amortization of trade names, customer lists, and patent $ 2,321,000 $ 2,257,000  
Purchase price allocation adjustment added to goodwill     $ 48,000
Sovereign [Member]      
Finite-Lived Intangible Assets [Line Items]      
Purchase price allocation adjustment added to goodwill   $ 48,000  
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 15 years