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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Divisions
Jan. 31, 2014
Jan. 31, 2013
Basis of Presentation and Principles of Consolidation      
Number of divisions operated in by Parent 3ravn_DivisionsOperatedInByParent    
Property, Plant and Equipment [Abstract]      
Capitalized software costs $ 0us-gaap_CapitalizedComputerSoftwareAdditions $ 203us-gaap_CapitalizedComputerSoftwareAdditions $ 7us-gaap_CapitalizedComputerSoftwareAdditions
Minimum [Member]      
Intangible Assets      
Finite-lived intangible assets, useful life, minimum, years 3 years    
Maximum [Member]      
Intangible Assets      
Finite-lived intangible assets, useful life, minimum, years 20 years    
Building and Improvements [Member] | Minimum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 15 years    
Building and Improvements [Member] | Maximum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 39 years    
Machinery and Equipment [Member] | Applied Technology [Member] | Minimum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 3 years    
Machinery and Equipment [Member] | Applied Technology [Member] | Maximum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 5 years    
Machinery and Equipment [Member] | Engineered Films [Member] | Minimum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 5 years    
Machinery and Equipment [Member] | Engineered Films [Member] | Maximum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 12 years    
Machinery and Equipment [Member] | Aerostar [Member] | Minimum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 3 years    
Machinery and Equipment [Member] | Aerostar [Member] | Maximum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 5 years    
Furniture, Fixtures, Office Equipment and Other [Member] | Minimum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 3 years    
Furniture, Fixtures, Office Equipment and Other [Member] | Maximum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 7 years    
Software Development [Member] | All Segments [Member] | Minimum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 3 years    
Software Development [Member] | All Segments [Member] | Maximum [Member]      
Property, Plant and Equipment [Abstract]      
Property, plant and equipment useful lives 5 years    
Aerostar Integrated Systems [Member]      
Noncontrolling Interest      
Joint venture, ownership percentage 75.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= ravn_AerostarIntegratedSystemsMember