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Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
6 Months Ended
Aug. 31, 2018
Feb. 28, 2018
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 250,505 $ 238,705
Less accumulated depreciation (122,234) (115,202)
Property and equipment, net 128,271 123,503
Land    
PROPERTY AND EQUIPMENT    
Property and equipment, gross 12,800 12,800
Building and improvements    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 106,983 106,870
Building and improvements | Minimum    
PROPERTY AND EQUIPMENT    
Estimated Useful Lives (Years) 3 years  
Building and improvements | Maximum    
PROPERTY AND EQUIPMENT    
Estimated Useful Lives (Years) 40 years  
Computer, furniture and other equipment    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 81,267 79,657
Computer, furniture and other equipment | Minimum    
PROPERTY AND EQUIPMENT    
Estimated Useful Lives (Years) 3 years  
Computer, furniture and other equipment | Maximum    
PROPERTY AND EQUIPMENT    
Estimated Useful Lives (Years) 15 years  
Tools, dies, molds and other production equipment    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 35,555 33,466
Tools, dies, molds and other production equipment | Minimum    
PROPERTY AND EQUIPMENT    
Estimated Useful Lives (Years) 1 year  
Tools, dies, molds and other production equipment | Maximum    
PROPERTY AND EQUIPMENT    
Estimated Useful Lives (Years) 10 years  
Construction in progress    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 13,900 $ 5,912