Stock-Based Compensation (Tables)

12 Months Ended

Apr. 30, 2014

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

Summary Of Stock Options

A summary of options for the fiscal year ended April 30, 2014, is as follows:

(dollars in 000s, except per share amounts)
	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding, beginning of the year	4,504		$	17.53
Granted	35		28.26
Exercised	(1,179	)	18.15
Forfeited or expired	(237	)	18.56
Outstanding, end of the year	3,123		$	17.34	6 years	$	34,655
Exercisable, end of the year	2,317		$	17.50	6 years	$	25,344
Exercisable and expected to vest	3,076		17.33		6 years	34,150

Assumptions Used To Value Options

The following assumptions were used to value options during the periods:

Year ended April 30,	2014		2013		2012
Options - management and director:
Expected volatility	30.89% - 31.57%		29.69% - 31.43%		31.75% - 32.34%
Expected term	4 years		4 - 5 years		5 years
Dividend yield	2.77% - 2.87%		4.18% - 5.21%		3.43% - 4.80%
Risk-free interest rate	1.06% - 1.31%		0.61% - 0.75%		0.79% - 1.95%
Weighted-average fair value	$	5.57	$	2.79	$	3.31

Summary Of Nonvested Shares

A summary of nonvested shares, nonvested share units and deferred stock units, including those that are performance-based, for the year ended April 30, 2014, is as follows:

(shares in 000s)
	Nonvested Shares and Nonvested Share 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	1,806		$	14.64	658		$	16.89
Granted	488		27.69		390		28.59
Released	(578	)	14.89		—		—
Forfeited	(149	)	17.74		(82	)	21.82
Outstanding, end of the year	1,567		$	18.23	966		$	20.98

Performance-Based Nonvested Share Units

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

Assumptions Used To Value Options

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,	2014			2013			2012
Expected volatility	11.75% – 70.17%			12.61% – 71.96%			20.68% – 143.12%
Expected term	3 years			3 years			3 years
Dividend yield (1)	0% – 2.88%			0% – 5.01%			—		%
Risk-free interest rate	0.61		%	0.40		%	0.75		%
Weighted-average fair value	$	28.59		$	16.72		$	17.46

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