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Acquisitions of and Investments in Businesses and Technologies Business Combinations (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 01, 2017
Oct. 31, 2017
Jan. 31, 2017
Oct. 31, 2016
Jan. 31, 2016
Business Combination, Description [Abstract]          
Goodwill   $ 46,752 $ 40,649 $ 40,703 $ 40,672
Engineered Films [Member]          
Business Combination, Description [Abstract]          
Goodwill   $ 33,459 27,518 27,518 27,518
Engineered Films [Member] | CLI [Member]          
Business Combination, Description [Abstract]          
Business Acquisition, Effective Date of Acquisition Agreement   Sep. 01, 2017      
Business Acquisition, Name of Acquired Entity   Colorado Lining International, Inc.      
Business Combination, Consideration Transferred $ 15,088        
Fair Value of Business Acquisition Contingent Consideration - at acquisition 1,256        
Goodwill 5,941        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 610        
Applied Technology [Member]          
Business Combination, Description [Abstract]          
Goodwill   $ 12,556 $ 12,342 12,396 $ 12,365
Applied Technology [Member] | AgEagle Aerial Systems [Member]          
Variable Interest Entity Disclosure [Abstract]          
Variable Interest Entity, acquisition date equity method investment   2/29/2016      
Variable Interest Entity, name of investee equity method investment   AgEagle Aerial Systems, Inc.      
Equity Method Investment, Ownership Percentage   5.00%      
Other Commitment   $ 0   0  
Guarantor Obligations, Maximum Exposure, Undiscounted   $ 0   $ 0