Condensed Consolidated Statements Of Earnings (USD $) In Thousands, except Share data	3 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
Condensed Consolidated Statements Of Earnings
Total revenue	$ 1,873,832	$ 1,362,027
Cost of goods sold (exclusive of depreciation and amortization, shown separately below)	1,607,050	1,128,056
Gross profit	266,782	233,971
Operating expenses	171,416	152,386
Depreciation and amortization	22,895	19,563
Interest, net	8,934	2,527
Earnings before income taxes	63,537	59,495
Federal and state income taxes	24,146	22,209
Net earnings	$ 39,391	$ 37,286
Earnings per common share
Basic	$ 1.04	$ 0.73
Diluted	$ 1.03	$ 0.73
Basic weighted average shares outstanding	38,024,376	50,946,829
Plus effect of stock options	307,838	282,287
Diluted weighted average shares outstanding	38,332,214	51,229,116