Share-Based Compensation (Tables)

9 Months Ended

Feb. 28, 2013

Transactions Involving Stock Options

Transactions involving our stock options during the nine months ended February 28, 2013 and February 29, 2012 are summarized below:

	Nine months Ended February 28, 2013					Nine Months Ended February 29, 2012
	(unaudited)					(unaudited)
	No. of Options			Weighted Average Exercise Price		No. of Options			Weighted Average Exercise Price
	(in thousands)					(in thousands)
Shares under option, beginning of period		1,562		$	18.95		1,856		$	17.81
Changes during the period:
Granted		—		$	—		—		$	—
Exercised		(508	)	$	16.23		(217	)	$	10.27
Cancelled		—		$	—		(2	)	$	30.33
Expired		—		$	—		(10	)	$	30.33
Shares under option, end of period		1,054		$	20.25		1,627		$	18.73
Exercisable at end of period		1,054		$	20.25		1,623		$	18.70

Options Outstanding, Range of Exercise Prices and Remaining Contractual Lives

For total options outstanding at February 28, 2013, the range of exercise prices and remaining contractual lives are as follows (unaudited):

Range of Prices	No. of Options		Weighted Average Exercise Price		Weighted Average Remaining Life
	(in thousands)				(in years)
$6.42 to $9.62		122	$	8.92		2.2
$9.63 to $12.82		157	$	11.10		2.9
$12.83 to $16.03		308	$	14.56		3.3
$16.04 to $32.05		467	$	30.05		4.6
		1,054	$	20.25		3.7

Transactions Involving Stock Units and Director Stock Grants

Transactions involving our stock units and director stock grants during the nine months ended February 28, 2013 and February 29, 2012 are summarized below:

	Nine Months Ended February 28, 2013					Nine Months Ended February 29, 2012
	(unaudited)					(unaudited)
	No. of Stock Units			Weighted Average Fair Value		No. of Stock Units			Weighted Average Fair Value
	(in thousands)					(in thousands)
Stock and stock units, beginning of period		342		$	21.73		310		$	19.80
Changes during the period:
Granted		141		$	32.81		159		$	24.78
Vested and settled		(142	)	$	22.54		(119	)	$	20.80
Cancelled		(8	)	$	22.40		(5	)	$	21.19
Stock and stock units, end of period		333		$	26.07		345		$	21.73

Transactions Involving Performance Awards

Transactions involving our performance awards during the nine months ended February 28, 2013 and February 29, 2012 are summarized below:

	Nine Months Ended February 28, 2013					Nine Months Ended February 29, 2012
	(unaudited)					(unaudited)
	No. of Performance Awards			Weighted Average Fair Value		No. of Performance Awards			Weighted Average Fair Value
	(in thousands)					(in thousands)
Performance awards, beginning of period		65		$	21.86		61		$	20.33
Changes during the period:
Granted		19		$	32.89		24		$	25.16
Vested and settled		(27	)	$	22.04		(20	)	$	21.14
Cancelled		—		$	—		—		$	—
Performance awards, end of period		57		$	25.45		65		$	21.86