Income Tax Effective tax rate (Tables)

6 Months Ended

Jul. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The Company’s effective tax rates were as follows:

	Three Months Ended				Six Months Ended
	July 31, 2020		July 31, 2019		July 31, 2020		July 31, 2019
Effective tax rate	10.8	%	20.0	%	2.2	%	15.5	%

Discrete Tax Benefit (Expense) [Table Text Block]

	Three Months Ended				Six Months Ended
	July 31, 2020		July 31, 2019		July 31, 2020		July 31, 2019
Discrete tax benefit (expense)	$	(54)	$	22	$	277	$	1,190