Stock-Based Compensation (Tables)

12 Months Ended

May 31, 2017

	Stock Options Granted In Fiscal Year
	2017			2016
Risk-free interest rate		1.0	%		1.6	%
Expected volatility of common stock		36.8	%		36.1	%
Dividend yield		1.3	%		1.1	%
Expected option term in years		4.0			4.2

A summary of stock option activity for the three years ended May 31, 2017 consisted of the following (shares in thousands):

	2017					2016					2015
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding at beginning of year		2,096		$	22.17		1,857		$	21.05		2,753		$	19.59
Granted		687		$	24.10		489		$	26.62		—		$	—
Exercised		(396	)	$	20.07		(122	)	$	20.61		(793	)	$	15.98
Cancelled		(53	)	$	25.42		(128	)	$	24.47		(103	)	$	21.03

Outstanding at end of year		2,334		$	23.02		2,096		$	22.17		1,857		$	21.05


Options exercisable at end of year		910		$	21.97		837		$	21.21		627		$	21.78

The following table provides additional information regarding stock options outstanding as of May 31, 2017 (shares in thousands):

	Options Outstanding						Options Exercisable
Option Exercise Price Range	Number Outstanding as of 5/31/17		Weighted-Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Number Exercisable as of 5/31/17		Weighted- Average Exercise Price
$12.00 - $20.00		500		4.4	$	14.02		349	$	14.49
$20.01 - $26.00		1,305		7.6	$	24.72		322	$	25.44
$26.01 - $34.50		529		7.2	$	27.36		239	$	28.25

		2,334		6.8	$	23.02		910	$	21.97

Restricted share activity during the fiscal year ended May 31, 2017 was as follows (shares in thousands):

	Number of Shares			Weighted Average Fair Value on Grant Date
Nonvested at May 31, 2016		400		$	25.61
Granted		302		$	24.24
Vested		(98	)	$	21.98
Forfeited		(9	)	$	26.32

Nonvested at May 31, 2017		595		$	25.93