Share Based Compensation (Tables)

9 Months Ended

Oct. 31, 2017

Share-based Compensation [Abstract]

Weighted average assumptions by grant year

The weighted average assumptions used for the Black-Scholes option pricing model by grant year are as follows:

	Nine Months Ended
	October 31, 2017		October 31, 2016
Risk-free interest rate	1.68	%	1.05	%
Expected dividend yield	1.78	%	3.33	%
Expected volatility factor	33.87	%	32.61	%
Expected option term (in years)	4.25		4.00
Weighted average grant date fair value	$7.35		$3.05