Stock-Based Compensation (Tables)

12 Months Ended

May 31, 2018

	Stock Options Granted In Fiscal Year
	2018			2017			2016
Risk-free interest rate		1.8	%		1.0	%		1.6	%
Expected volatility of common stock		31.7	%		36.8	%		36.1	%
Dividend yield		0.9	%		1.3	%		1.1	%
Expected option term in years		4.3			4.0			4.2

A summary of stock option activity for the three years ended May 31, 2018 consisted of the following (shares in thousands):

	2018					2017					2016
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding at beginning of year		2,334		$	23.02		2,096		$	22.17		1,857		$	21.05
Granted		463		$	35.33		687		$	24.10		489		$	26.62
Exercised		(704	)	$	20.04		(396	)	$	20.07		(122	)	$	20.61
Cancelled		(11	)	$	29.50		(53	)	$	25.42		(128	)	$	24.47

Outstanding at end of year		2,082		$	26.72		2,334		$	23.02		2,096		$	22.17


Options exercisable at end of year		883		$	23.81		910		$	21.97		837		$	21.21

The following table provides additional information regarding stock options outstanding as of May 31, 2018 (shares in thousands):

	Options Outstanding						Options Exercisable
Option Exercise Price Range	Number Outstanding as of 5/31/18		Weighted-Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Number Exercisable as of 5/31/18		Weighted- Average Exercise Price
$12.00 - $20.00		160		3.2	$	14.51		160	$	14.51
$20.01 - $26.00		1,041		6.8	$	24.63		447	$	24.93
$26.01 - $38.70		881		7.9	$	31.41		276	$	27.37

		2,082		7.0	$	26.72		883	$	23.81

Restricted share activity during the fiscal year ended May 31, 2018 was as follows (shares in thousands):

	Number of Shares			Weighted Average Fair Value on Grant Date
Nonvested at May 31, 2017		595		$	25.93
Granted		188		$	35.35
Vested		(91	)	$	25.08
Forfeited		(8	)	$	26.43

Nonvested at May 31, 2018		684		$	27.89