Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Jul. 31, 2020	Jul. 31, 2019
Income Statement [Abstract]
Total revenue	[1]	$ 2,105,021	$ 2,626,629
Cost of goods sold (exclusive of depreciation and amortization, shown separately below)	[1]	1,481,518	2,060,943
Operating expenses		386,088	379,841
Depreciation and amortization		65,820	59,808
Interest, net		13,407	13,721
Income before income taxes		158,188	112,316
Federal and state income taxes		37,596	26,501
Net income		$ 120,592	$ 85,815
Net income per common share
Basic (in dollars per share)		$ 3.26	$ 2.33
Diluted (in dollars per share)		$ 3.24	$ 2.31
Basic weighted average shares outstanding (in shares)		36,971,376	36,864,070
Plus effect of stock compensation (in shares)		270,797	221,852
Diluted weighted average shares outstanding (in shares)		37,242,173	37,085,922
Dividends declared per share (in dollars per share)		$ 0.32	$ 0.32
Excise taxes		$ 259,539	$ 274,617

[1] Includes excise taxes of: $259,539 and $274,617