Income Tax Effective tax rate (Tables)

6 Months Ended

Jul. 31, 2019

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, 2019		July 31, 2018		July 31, 2019		July 31, 2018
Effective tax rate	20.0	%	16.8	%	15.5	%	17.9	%

discrete tax benefit (expense) [Table Text Block]

The Company recognized a discrete tax benefit related to the vesting or settlement of equity awards as follows:

	Three Months Ended				Six Months Ended
	July 31, 2019		July 31, 2018		July 31, 2019		July 31, 2018
Discrete tax benefit	$	22	$	471	$	1,190	$	714