Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Net sales	$ 4,582,112	$ 4,006,819	$ 3,525,456
Cost of products sold	3,855,787	3,449,274	3,055,060
Gross profit	726,325	557,545	470,396
Selling, general and administrative expenses	306,269	250,891	208,712
Impairment charges	9,113		710
Amortization of intangible assets	27,962	16,015	12,920
Interest income	743	1,292	1,577
Interest expense	1,592	180	10
Other income, net	1,181	1,144	3,198
Income from continuing operations before income taxes	383,313	292,895	252,819
Income taxes	125,291	90,886	77,303
Net income from continuing operations	258,022	202,009	175,516
Income (loss) from discontinued operations, net of income taxes	(1,503)	(2,624)	3,486
Net income	$ 256,519	$ 199,385	$ 179,002
Earnings per common share from continuing operations:
Basic	$ 4.92	$ 3.80	$ 3.29
Diluted	4.91	3.79	3.29
Earnings (loss) per common share from discontinued operations:
Basic	(0.03)	(0.05)	0.07
Diluted	(0.03)	(0.05)	0.06
Earnings per common share:
Basic	4.89	3.75	3.36
Diluted	$ 4.88	$ 3.74	$ 3.35
Net income	$ 256,519	$ 199,385	$ 179,002
Unrealized appreciation on investments, net of tax effects of $0, $0 and $12			22
Comprehensive income	$ 256,519	$ 199,385	$ 179,024