Acquisitions and Divestitures of and Investments in Businesses and Technologies Acquisition-related Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Acquisition-related contingent consideration [Roll Forward]
Acquisition-related contingent consideration, Beginning Balance	$ 2,459	$ 3,579	$ 2,934	$ 4,172
Fair Value Contingent Consideration Acquisition of a Business	0	0	0	310
Change in fair value of acquisition-related contingent consideration	29	100	(183)	343
Contingent consideration earn-out paid	(234)	(723)	(497)	(1,869)
Acquisition-related contingent consideration, Ending Balance	2,254	2,956	2,254	2,956
Acquisition-related contingent consideration liability, current					$ 0	$ 813
Acquisition-related contingent consideration liability, Noncurrent					2,254	2,143
Business Combination, Contingent Consideration, Liability	$ 2,254	$ 2,956	$ 2,254	$ 2,956	2,254	$ 2,956
Applied Technology [Member] | AgSync [Member]
Business Combination, Contingent Consideration Arrangements [Abstract]
Contingent Consideration Term in Years			3 years
Contingent consideration, potential cash payment					3,500
Business acquisition contingent consideration cumulative paid			$ 0
Applied Technology [Member] | Raven Europe [Member]
Business Combination, Contingent Consideration Arrangements [Abstract]
Contingent Consideration Term in Years			10 years
Contingent consideration, potential cash payment					2,500
Business acquisition contingent consideration cumulative paid			$ 2,500
Engineered Films [Member] | CLI [Member]
Business Combination, Contingent Consideration Arrangements [Abstract]
Contingent Consideration Term in Years			3 years
Contingent consideration, potential cash payment					$ 2,000
Business acquisition contingent consideration cumulative paid			$ 1,567