Net Income Per Common Share (Tables)

12 Months Ended

Apr. 30, 2018

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,
	2018		2017		2016
Basic
Net income	$	317,903	$	177,485	$	225,982
Weighted average shares outstanding-basic	37,778,304		39,124,665		39,016,299
Basic earnings per common share	$	8.41	$	4.54	$	5.79
Diluted
Net income	$	317,903	$	177,485	$	225,982
Weighted-average shares outstanding-basic	37,778,304		39,124,665		39,016,299
Plus effect of stock options and restricted stock units	353,795		454,333		405,900
Weighted-average shares outstanding-diluted	38,132,099		39,578,998		39,422,199
Diluted earnings per common share	$	8.34	$	4.48	$	5.73