Employee Benefit Plans (Tables)

12 Months Ended

Jan. 31, 2019

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

A summary of the Company’s RSU activity for the fiscal year ended January 31, 2019 is as follows:

	Shares		Weighted-average grant date fair value
Nonvested at January 31, 2018	700,532		$	83.25
Granted	280,352		85.50
Vested	(267,591	)	78.87
Canceled	(64,171	)	86.10
Nonvested at January 31, 2019	649,122		85.71

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

A summary of the Company’s PRSU activity, assuming maximum achievement, for the year ended January 31, 2019 is as follows:

	Shares		Weighted-average grant date fair value
Nonvested at January 31, 2018	170,685		$	89.67
Granted	153,719		82.13
Canceled	(31,188	)	88.50
Nonvested at January 31, 2019	293,216		85.84