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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 125,756 $ 117,929
Less: Accumulated depreciation and amortization (99,689) (93,258)
Property, plant and equipment, net 26,067 24,671
Land and buildings    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,176 1,610
Property, plant and equipment, Estimated Useful Lives 40 years for buildings  
Furniture and equipment    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 52,314 48,748
Furniture and equipment | Minimum    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, Estimated Useful Lives 4 years  
Furniture and equipment | Maximum    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, Estimated Useful Lives 10 years  
Computer software    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 33,289 32,359
Computer software | Minimum    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, Estimated Useful Lives 5 years  
Computer software | Maximum    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, Estimated Useful Lives 10 years  
Leasehold improvements    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 36,727 32,814
Property, plant and equipment, Estimated Useful Lives Lesser of lease term or useful life  
Design fees and tooling costs    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 2,250 $ 2,398
Property, plant and equipment, Estimated Useful Lives 3 years