Net Income Per Common Share (Tables)

12 Months Ended

Apr. 30, 2016

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

Computations for basic and diluted earnings per common share are presented below:

	Years ended April 30,
	2016		2015		2014
Basic
Net income	$	225,982	$	180,628	$	126,820
Weighted average shares outstanding-basic	39,016,299		38,743,227		38,457,680
Basic earnings per common share	$	5.79	$	4.66	$	3.30
Diluted
Net income	$	225,982	$	180,628	$	126,820
Weighted-average shares outstanding-basic	39,016,299		38,743,227		38,457,680
Plus effect of stock options and restricted stock units	405,900		360,606		410,726
Weighted-average shares outstanding-diluted	39,422,199		39,103,833		38,868,406
Diluted earnings per common share	$	5.73	$	4.62	$	3.26