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Property and Equipment - Summary of PP&E (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2018
May 31, 2017
Feb. 28, 2017
May 31, 2016
Feb. 28, 2018
Feb. 28, 2017
Feb. 29, 2016
PROPERTY AND EQUIPMENT              
Property and equipment, gross $ 238,705   $ 228,655   $ 238,705 $ 228,655  
Less accumulated depreciation (115,202)   (102,153)   (115,202) (102,153)  
Property and equipment, net 123,503   126,502   123,503 126,502  
Depreciation expense         14,900 14,200 $ 13,400
Rent expense related to operating leases         5,500 5,300 5,100
Asset impairment charges 11,447 $ 4,000 500 $ 2,400 15,447 2,900 6,000
Cost of goods sold              
PROPERTY AND EQUIPMENT              
Depreciation expense         3,700 4,600 4,300
SG&A              
PROPERTY AND EQUIPMENT              
Property and equipment, net             3
Depreciation expense         11,200 9,600 9,100
Land              
PROPERTY AND EQUIPMENT              
Property and equipment, gross 12,800   12,800   12,800 12,800  
Building and improvements              
PROPERTY AND EQUIPMENT              
Property and equipment, gross 106,870   106,648   $ 106,870 106,648  
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 79,657   72,444   $ 79,657 72,444  
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 33,466   31,157   $ 33,466 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 $ 5,912   $ 5,606   $ 5,912 $ 5,606  
Venezuela              
PROPERTY AND EQUIPMENT              
Asset impairment charges             $ 9,160