Income Tax Effective tax rate (Tables)

6 Months Ended

Jul. 31, 2018

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, 2018		July 31, 2017		July 31, 2018		July 31, 2017
Effective tax rate	16.8	%	29.2	%	17.9	%	30.5	%

discrete tax benefit (expense) [Table Text Block]

The Company also recognized a discrete tax benefit (expense) related to the vesting or settlement of stock awards as follows:

	Three Months Ended					Six Months Ended
	July 31, 2018		July 31, 2017			July 31, 2018		July 31, 2017
Discrete tax benefit (expense)	$	471	$	(90	)	$	714	$	(569	)