Share Based Compensation (Tables)

12 Months Ended

Jan. 31, 2012

Share-based Compensation [Abstract]

The compensation cost and related income tax benefit for these plans

The compensation cost and related income tax benefit for these plans were as follows:

	For the years ended January 31
	2012		2011		2010
Stock compensation cost	$	1,922	$	1,179	$	1,034
Tax benefit	547		272		185

Weighted average assumptions by grant year

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model, with the following weighted average assumptions by grant year:

	For the years ended January 31
	2012			2011			2010
Risk-free interest rate	0.67		%	1.46		%	2.03		%
Expected dividend yield	1.20		%	1.49		%	1.73		%
Expected volatility factor	51.44		%	49.33		%	49.69		%
Expected option term (in years)	4.00			4.50			4.50
Weighted average grant date fair value	$	22.11		$	15.70		$	11.28

Outstanding stock options

Outstanding stock options as of January 31, 2012 and activity for the year then ended are presented below:

	Number of options		Weighted average exercise price		Aggregate intrinsic value		Weighted average remaining contractual term (years)
Outstanding, January 31, 2011	445		$	33.86
Granted	136		59.99
Exercised	(84	)	29.74
Forfeited	(1	)	28.01
Outstanding, January 31, 2012	496		$	41.73	$	11,474	3.27
Exercisable, January 31, 2012	181		$	32.04	$	5,956	2.16

Outstanding stock units

Outstanding stock units as of January 31, 2012 and changes during the year then ended are presented below:

	Number of units		Weighted average price
Outstanding, January 31, 2011	27		$	47.24
Granted	3		51.89
Deferred retainers	1		51.89
Dividends	1		58.62
Converted into common shares	(7	)	56.82
Outstanding, January 31, 2012	25		$	64.89