Share-Based Compensation (Tables)

3 Months Ended

Aug. 31, 2013

Transactions Involving Stock Options

Transactions involving our stock options during the three months ended August 31, 2013 and 2012 are summarized below:

	Three Months Ended August 31, 2013					Three Months Ended August 31, 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		1,052		$	20.24		1,562		$	18.95
Changes during the period:
Granted		—		$	—		—		$	—
Exercised		(23	)	$	29.92		(57	)	$	8.00
Cancelled		—		$	—		—		$	—
Expired		—		$	—		—		$	—
Shares under option, end of period		1,029		$	20.03		1,505		$	19.36
Exercisable at end of period		1,029		$	20.03		1,505		$	19.36

Options Outstanding, Range of Exercise Prices and Remaining Contractual Lives

For total options outstanding at August 31, 2013, the range of exercise prices and remaining contractual lives are as follows:

Range of Prices	No. of Options		Weighted Average Exercise Price		Weighted Average Remaining Life
	(in thousands)				(in years)
$6.42 to $9.62		121	$	8.93		1.7
$9.63 to $12.82		157	$	11.10		2.4
$12.83 to $16.03		308	$	14.56		2.8
$16.04 to $32.05		443	$	30.04		4.1
		1,029	$	20.03		3.1

Transactions Involving Performance Awards

Transactions involving our performance awards during the three months ended August 31, 2013 and 2012 are summarized below:

	Three Months Ended August 31, 2013				Three Months Ended August 31, 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		57	$	25.45		64	$	21.86
Changes during the period:
Granted		—	$	—		—	$	—
Vested and settled		—	$	—		—	$	—
Cancelled		—	$	—		—	$	—
Performance awards, end of period		57	$	25.45		64	$	21.86

Transactions Involving Stock Units and Director Stock Grants

Transactions involving our stock units and director stock grants during the three months ended August 31, 2013 and 2012 are summarized below:

	Three Months Ended August 31, 2013					Three Months Ended August 31, 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		329		$	26.07		342		$	21.73
Changes during the period:
Granted		7		$	38.88		—			—
Vested and settled		—			—		(3	)	$	21.32
Cancelled		(7	)	$	25.50		(6	)	$	21.25
Stock and stock units, end of period		329		$	26.36		333		$	21.74