Condensed Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Net sales	$ 1,046,823	$ 929,765	$ 2,482,116	$ 2,327,794
Cost of products sold	904,743	805,206	2,164,526	2,043,414
Gross profit	142,080	124,559	317,590	284,380
Selling, general and administrative expenses	56,953	52,571	149,060	140,907
Amortization of intangible assets	3,102	2,601	9,166	7,858
Impairment charges			710
Interest income	314	572	1,215	2,081
Interest expense		2	7	7
Other income, net	409	606	1,229	1,500
Income from continuing operations before income taxes	82,748	70,563	161,091	139,189
Income taxes	27,623	21,850	52,354	42,708
Net income from continuing operations	55,125	48,713	108,737	96,481
Income (loss) from discontinued operations, net of income taxes	(3)	(4,956)	3,685	(1,840)
Net Income	55,122	43,757	112,422	94,641
Weighted average common shares outstanding:
Basic	53,289,864	53,023,277	53,261,186	52,984,192
Diluted	53,385,364	53,114,475	53,345,644	53,088,391
Earnings per common share from continuing operations:
Basic	$ 1.03	$ 0.92	$ 2.04	$ 1.82
Diluted	$ 1.03	$ 0.92	$ 2.04	$ 1.82
Earnings (loss) per common share from discontinued operations:
Basic		$ (0.09)	$ 0.07	$ (0.03)
Diluted		$ (0.10)	$ 0.07	$ (0.04)
Earnings per common share:
Basic	$ 1.03	$ 0.83	$ 2.11	$ 1.79
Diluted	$ 1.03	$ 0.82	$ 2.11	$ 1.78
Net income	55,122	43,757	112,422	94,641
Unrealized appreciation on investments, net of tax			22	17
Comprehensive income	$ 55,122	$ 43,757	$ 112,444	$ 94,658
Regular Dividend
Earnings per common share:
Dividends paid per common share	$ 0.23	$ 0.18	$ 0.69	$ 0.54
Special Dividend
Earnings per common share:
Dividends paid per common share			$ 1.00	$ 1.50