Stock-Based Compensation (Tables)

12 Months Ended

Apr. 30, 2019

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Share Activity

A summary of nonvested shares, nonvested share units and deferred stock units, including those that are performance-based, for the year ended April 30, 2019, is as follows:

(shares in 000s)
	Nonvested Shares, Nonvested Share Units, and Deferred Stock Units				Performance-Based Nonvested Share Units
	Shares		Weighted-Average Grant Date  Fair Value		Shares		Weighted-Average Grant Date  Fair Value
Outstanding, beginning of the year	1,539		$	25.54	1,127		$	29.01
Granted	615		23.07		351		24.48
Released	(483	)	26.40		(175	)	29.32
Forfeited	(88	)	26.10		(65	)	29.88
Outstanding, end of the year	1,583		$	24.34	1,238		$	26.89

Share-based Compensation, Stock Options, Activity

A summary of options for the fiscal year ended April 30, 2019, is as follows:

(in 000s, except per share amounts)
	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding, beginning of the year	481		$	24.84
Granted	—		—
Exercised	(42	)	18.39
Forfeited or expired	—		—
Outstanding, end of the year	439		$	25.47	6 years	$	1,504
Exercisable, end of the year	249		$	22.49	5 years	$	1,452
Exercisable and expected to vest	419		$	25.27	6 years	$	1,504

Performance-Based Nonvested Share Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following assumptions were used to value performance-based nonvested share units using the Monte Carlo valuation model during the periods:

Year ended April 30,	2019			2018		2017
Expected volatility	13.16% - 66.47%			13.33% - 81.19%		13.92% - 74.53%
Expected term	3 years			3 years		3 years
Dividend yield (1)	0% - 4.39%			0% - 3.23%		0% - 3.68%
Risk-free interest rate	2.61		%	1.42% - 1.55%		0.84		%
Weighted-average fair value	$	24.48		$	32.66	$	25.38

⁽¹⁾  The valuation model assumes that dividends are reinvested by the Company on a continuous basis.