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Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
9 Months Ended
Nov. 30, 2017
Feb. 28, 2017
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 251,474 $ 241,496
Less accumulated depreciation (118,485) (106,561)
Property and equipment, net 132,989 134,935
Land    
PROPERTY AND EQUIPMENT    
Property and equipment, gross 12,800 12,800
Building and improvements    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 109,108 109,026
Building and improvements | Minimum    
PROPERTY AND EQUIPMENT    
Estimated useful life 3 years  
Building and improvements | Maximum    
PROPERTY AND EQUIPMENT    
Estimated useful life 40 years  
Computer, furniture and other equipment    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 89,838 81,122
Computer, furniture and other equipment | Minimum    
PROPERTY AND EQUIPMENT    
Estimated useful life 3 years  
Computer, furniture and other equipment | Maximum    
PROPERTY AND EQUIPMENT    
Estimated useful life 15 years  
Tools, dies, molds and other production equipment    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 33,792 31,157
Tools, dies, molds and other production equipment | Minimum    
PROPERTY AND EQUIPMENT    
Estimated useful life 1 year  
Tools, dies, molds and other production equipment | Maximum    
PROPERTY AND EQUIPMENT    
Estimated useful life 10 years  
Construction in progress    
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 5,936 $ 7,391