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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory and Licenses (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 29, 2016
USD ($)
item
Feb. 29, 2016
USD ($)
item
May. 31, 2015
USD ($)
May. 31, 2014
USD ($)
Feb. 29, 2016
USD ($)
item
Feb. 28, 2015
USD ($)
Feb. 28, 2014
USD ($)
Summary of significant accounting policies              
General and administrative expenses charged to inventory $ 39,220 $ 39,220     $ 39,220 $ 36,370 $ 36,230
General and administrative expenses directly attributable to the procurement of inventory included in inventory balances $ 13,050 13,050     $ 13,050 12,520  
Number of licensors exceeding 10 percent of net sales revenue | item         2    
Non-cash impairment charges   $ 3,000 $ 3,000 $ 9,000 $ 6,000 $ 9,000 $ 12,049
Supplier concentration risk              
Summary of significant accounting policies              
Number of third-party manufacturers | item 2 2     2    
Number of suppliers exceeding 10 percent of product requirements | item         1    
Cost of goods sold manufactured by vendors | Supplier concentration risk | Vendors in Far East              
Summary of significant accounting policies              
Concentration Risk, Percentage         68.00% 67.00% 69.00%
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top two manufacturers              
Summary of significant accounting policies              
Concentration Risk, Percentage         17.00%    
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top five suppliers              
Summary of significant accounting policies              
Concentration Risk, Percentage         31.00%    
Net sales revenue | Net sales revenue subject to trademark license agreements              
Summary of significant accounting policies              
Concentration Risk, Percentage         41.00% 42.00% 44.00%
Net sales revenue | Net sales revenue subject to trademark license agreements | Top Licensor              
Summary of significant accounting policies              
Concentration Risk, Percentage         20.00%    
Net sales revenue | Net sales revenue subject to trademark license agreements | Second Top Licensor              
Summary of significant accounting policies              
Concentration Risk, Percentage         12.00%    
Venezuela              
Summary of significant accounting policies              
Non-cash impairment charges $ 9,160            
Venezuela | Inventory              
Summary of significant accounting policies              
Non-cash impairment charges 9,080            
Venezuela | Property and equipment              
Summary of significant accounting policies              
Non-cash impairment charges $ 80            
Venezuela | Net sales revenue              
Summary of significant accounting policies              
Concentration Risk, Percentage         1.40% 0.70% 0.60%