Earnings per Share

6 Months Ended

Oct. 31, 2011

Earnings per Share [Abstract]

Earnings per Share

Note I – Earnings per Share

The following tables set forth the computation of net income per common share and net income per common share – assuming dilution.

	Three Months Ended October 31,				Six Months Ended October 31,
	2011		2010		2011		2010
Computation of net income per share:
Net income	$	127,247	$	149,726	$	238,770	$	252,607
Net income allocated to participating securities		1,297		1,501		2,424		2,478
Net income allocated to common shareholders	$	125,950	$	148,225	$	236,346	$	250,129
Weighted-average common shares outstanding		112,731,758		118,313,698		112,927,273		118,235,258
Net income per common share	$	1.12	$	1.25	$	2.09	$	2.12

	Three Months Ended October 31,				Six Months Ended October 31,
	2011		2010		2011		2010
Computation of net income per share—assuming dilution:
Net income	$	127,247	$	149,726	$	238,770	$	252,607
Net income allocated to participating securities		1,297		1,500		2,423		2,476
Net income allocated to common shareholders	$	125,950	$	148,226	$	236,347	$	250,131
Weighted-average common shares outstanding		112,731,758		118,313,698		112,927,273		118,235,258
Dilutive effect of stock options		51,670		130,397		54,654		134,980
Weighted-average common shares outstanding assuming dilution		112,783,428		118,444,095		112,981,927		118,370,238
Net income per common share—assuming dilution	$	1.12	$	1.25	$	2.09	$	2.11

The following table reconciles the weighted-average common shares used in the basic and diluted earnings per share disclosures to the total weighted-average shares outstanding.

	Three Months Ended October 31,				Six Months Ended October 31,
	2011		2010		2011		2010
Weighted-average common shares outstanding		112,731,758		118,313,698		112,927,273		118,235,258
Weighted-average participating shares outstanding		1,161,277		1,198,303		1,158,018		1,171,207
Total weighted-average shares outstanding		113,893,035		119,512,001		114,085,291		119,406,465
Dilutive effect of stock options		51,670		130,397		54,654		134,980
Total weighted-average shares outstanding—assuming dilution		113,944,705		119,642,398		114,139,945		119,541,445