Acquisition, Integration and Restructuring Expenses | Global Business Optimization Restructuring Activity (Details) - Global Business Optimization Program - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 1,669	$ 6,221
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	8,718
Restructuring Charges	1,379	4,147
Payments for Restructuring	(4,187)
Restructuring Reserve, Translation and Other Adjustment	(165)
Restructuring Reserve - Ending Balance	5,745
Professional services
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	17
Restructuring Charges	290	$ 2,074
Payments for Restructuring	(302)
Restructuring Reserve, Translation and Other Adjustment	(1)
Restructuring Reserve - Ending Balance	4
Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	8,735
Restructuring Charges	1,669
Payments for Restructuring	(4,489)
Restructuring Reserve, Translation and Other Adjustment	(166)
Restructuring Reserve - Ending Balance	$ 5,749