Earnings per Share

9 Months Ended

Jan. 31, 2013

Earnings Per Share [Abstract]

Earnings per Share

Note 10: Earnings per Share

The following table sets forth the computation of net income per common share and net income per common share – assuming dilution under the two-class method.

	Three Months Ended January 31,				Nine Months Ended January 31,
	2013		2012		2013		2012
Computation of net income per common share:
Net income	$	154,168	$	116,844	$	413,878	$	355,614
Net income allocated to participating securities		1,341		974		3,594		3,394
Net income allocated to common stockholders	$	152,827	$	115,870	$	410,284	$	352,220
Weighted-average common shares outstanding		107,528,722		112,493,822		108,405,604		112,783,014
Net income per common share	$	1.42	$	1.03	$	3.78	$	3.12
Computation of net income per common share—assuming dilution:
Net income	$	154,168	$	116,844	$	413,878	$	355,614
Net income allocated to participating securities		1,341		973		3,593		3,394
Net income allocated to common stockholders	$	152,827	$	115,871	$	410,285	$	352,220
Weighted-average common shares outstanding		107,528,722		112,493,822		108,405,604		112,783,014
Dilutive effect of stock options		19,655		49,125		25,263		52,811
Weighted-average common shares outstanding—assuming dilution		107,548,377		112,542,947		108,430,867		112,835,825
Net income per common share—assuming dilution	$	1.42	$	1.03	$	3.78	$	3.12

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 January 31,				Nine Months Ended January 31,
	2013		2012		2013		2012
Weighted-average common shares outstanding		107,528,722		112,493,822		108,405,604		112,783,014
Weighted-average participating shares outstanding		943,545		945,330		949,527		1,086,897
Total weighted-average shares outstanding		108,472,267		113,439,152		109,355,131		113,869,911
Dilutive effect of stock options		19,655		49,125		25,263		52,811
Total weighted-average shares outstanding—assuming dilution		108,491,922		113,488,277		109,380,394		113,922,722