Acquisitions of and Investments in Businesses and Technologies - Contingent Consideration (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2019	Jan. 31, 2018
Acquisition-related contingent consideration [Roll Forward]
Beginning balance	$ 3,046	$ 1,741
Fair value of contingent consideration acquired	1,742	1,256
Change in fair value of the liability	708	457
Contingent consideration earn-out paid	(1,324)	(408)	$ (354)
Ending balance	4,172	3,046	1,741
Balance Sheet Classification [Abstract]
Fair value of contingent consideration liability, current				$ 1,796	$ 1,036
Fair value of contingent consideration liability, noncurrent				2,376	2,010
Ending balance	$ 3,046	$ 3,046	$ 1,741	4,172	$ 3,046
Engineered Films | CLI
Balance Sheet Classification [Abstract]
Maximum amount of contingent consideration to be paid				2,000
Duration for payments of contingent consideration	3 years
Business acquisition contingent consideration cumulative paid	$ 667
Applied Technology | AgSync
Balance Sheet Classification [Abstract]
Maximum amount of contingent consideration to be paid				3,500
Duration for payments of contingent consideration	3 years
Business acquisition contingent consideration cumulative paid	$ 0
Applied Technology | SBG Innovatiie
Balance Sheet Classification [Abstract]
Maximum amount of contingent consideration to be paid				$ 2,500
Duration for payments of contingent consideration	10 years
Business acquisition contingent consideration cumulative paid	$ 1,336
Aerostar | ATS
Balance Sheet Classification [Abstract]
Duration for payments of contingent consideration	7 years
Business acquisition contingent consideration cumulative paid	$ 1,783