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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jan. 31, 2017
Jan. 31, 2016
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 126,824 $ 124,983
Less: accumulated depreciation (92,651) (86,430)
Property, plant and equipment, net 34,173 38,553
Land and buildings    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross 1,490 1,574
Furniture and equipment    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross 59,163 58,617
Computer software    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross 32,077 31,747
Leasehold improvements    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross 32,307 31,646
Design fees and tooling costs    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,787 $ 1,399