Stock-Based Compensation Plans (Tables)

9 Months Ended

Feb. 28, 2013

Weighted-Average Grant Date Fair Value of Options Granted and Weighted-Average Assumptions Used for Grants

The following table sets forth the information about the weighted-average grant date fair value of options granted during the nine-month period February 29, 2012 and the weighted-average assumptions used for such grants.

	Nine months ended February 29,
	2012
Weighted average grant date fair value	$	13.80
Weighted average assumptions used:
Expected volatility	.450
Expected option term in years	6.7
Risk-free interest rate	1.31		%
Expected dividend yield	.02		%

Option Transactions

A summary of option transactions for the nine-month periods ended February 28, 2013, follows:

	Shares Under Option		Weighted-Average Option Price
Outstanding at May 31, 2012	2,145,570		$	38.54
Exercised	(278,477	)	31.27
Canceled	(33,394	)	42.49
Outstanding at February 28, 2013	1,833,699		$	39.57
Exercisable at February 28, 2013	1,166,137		$	43.12

Stock Options Outstanding

The following table summarizes information about stock options outstanding as of February 28, 2013.

	Range of Exercise Prices
	$16.04 - $29.38		$33.57 - $48.60		$50.63 - $70.18
Options outstanding
Shares outstanding	654,204		702,680		476,815
Weighted-average remaining life in years	6.50		5.86		3.37
Weighted-average exercise price	$	26.03	$	39.76	$	57.88
Options exercisable
Shares exercisable	306,052		383,270		476,815
Weighted-average remaining life in years	4.58		4.79		3.35
Weighted-average exercise price	$	23.25	$	40.62	$	57.87