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Property and Equipment - Summary of PP&E (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 29, 2016
Feb. 28, 2017
May 31, 2016
Feb. 29, 2016
May 31, 2015
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2015
PROPERTY AND EQUIPMENT                
Property and equipment, gross $ 224,391 $ 241,496   $ 224,391   $ 241,496 $ 224,391  
Less accumulated depreciation (93,926) (106,561)   (93,926)   (106,561) (93,926)  
Property and equipment, net 130,465 134,935   130,465   134,935 130,465  
Depreciation expense           16,000 15,000 $ 14,300
Rent expense related to operating leases           6,100 5,900 5,000
Asset impairment charges   5,000 $ 7,400 3,000 $ 3,000 12,400 6,000 9,000
Cost of goods sold                
PROPERTY AND EQUIPMENT                
Depreciation expense           4,600 4,300 3,800
SG&A                
PROPERTY AND EQUIPMENT                
Depreciation expense           11,400 10,700 $ 10,500
Southhaven, Mississippi facility                
PROPERTY AND EQUIPMENT                
Capital expenditures for property and equipment             1,700  
Land                
PROPERTY AND EQUIPMENT                
Property and equipment, gross 12,800 12,800   12,800   12,800 12,800  
Building and improvements                
PROPERTY AND EQUIPMENT                
Property and equipment, gross 108,509 109,026   108,509   $ 109,026 108,509  
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 70,778 81,122   70,778   $ 81,122 70,778  
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 28,254 31,157   28,254   $ 31,157 28,254  
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 4,050 7,391   $ 4,050   $ 7,391 $ 4,050  
Venezuela                
PROPERTY AND EQUIPMENT                
Asset impairment charges 9,160              
Venezuela | SG&A                
PROPERTY AND EQUIPMENT                
Property and equipment, net   $ 3       $ 3    
Venezuela | Property and equipment                
PROPERTY AND EQUIPMENT                
Asset impairment charges $ 100