Stock-Based Compensation (Tables)

12 Months Ended

May 31, 2012

Stock-Based Compensation

Assumptions used in the Black-Scholes option pricing model to estimate the fair value of each stock option grant

	Stock Options Granted In Fiscal Year
	2012			2011			2010
Risk-free interest rate		1.5	%		1.8	%		2.3	%
Expected volatility of common stock		46.1	%		47.0	%		49.1	%
Dividend yield		1.1	%		0.0	%		0.0	%
Expected option term in years		5.7			5.8			6.0

Summary of stock option activity

	2012					2011					2010
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding at beginning of year		1,994		$	18.56		1,543		$	19.28		1,225		$	21.18
Granted		169		$	28.45		721		$	17.54		695		$	15.21
Exercised		(339	)	$	19.95		(128	)	$	15.85		(217	)	$	12.47
Cancelled		(121	)	$	19.73		(142	)	$	21.79		(160	)	$	22.60
Outstanding at end of year		1,703		$	17.96		1,994		$	18.56		1,543		$	19.28
Options exercisable at end of year		880		$	17.10		935		$	19.40		663		$	20.92

Schedule of additional information regarding stock options outstanding

	Options Outstanding						Options Exercisable
Option Exercise Price Range	Number Outstanding as of 5/31/12		Weighted-Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Number Exercisable as of 5/31/12		Weighted- Average Exercise Price
$  3.50 - $13.00		69		1.3	$	7.27		69	$	7.27
$13.01 - $18.50		1,289		6.7	$	16.25		655	$	15.95
$18.51 - $24.50		135		5.2	$	20.62		81	$	21.47
$24.51 - $34.50		210		8.1	$	30.24		75	$	31.27
		1,703		6.5	$	17.96		880	$	17.10

Schedule of restricted share activity

	Number of Shares			Weighted Average Fair Value on Grant Date
Nonvested at May 31, 2011		1,374		$	23.06
Granted		707		$	24.20
Vested		(370	)	$	26.60
Forfeited		(134	)	$	24.47
Nonvested at May 31, 2012		1,577		$	22.65