Condensed Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Net Sales	$ 1,049,201	$ 926,458	$ 2,666,413	$ 2,196,428
Cost of products sold	915,402	816,988	2,358,626	1,952,600
Gross profit	133,799	109,470	307,787	243,828
Selling, general and administrative expenses	57,846	46,963	155,498	121,668
Impairment of goodwill and intangible assets	11,525		11,525
Amortization of intangible assets	2,795	2,756	8,357	8,380
Interest income	574	936	2,088	2,996
Interest expense	98	101	265	371
Other income, net	516	633	1,537	958
Income before income taxes	62,625	61,219	135,767	117,363
Income taxes	18,868	19,878	41,126	39,984
Net income	43,757	41,341	94,641	77,379
Weighted average common shares outstanding:
Basic	53,023,277	52,879,877	52,984,192	54,162,411
Diluted	53,114,475	52,970,357	53,088,391	54,212,663
Earnings per common share:
Basic	$ 0.83	$ 0.78	$ 1.79	$ 1.43
Diluted	$ 0.82	$ 0.78	$ 1.78	$ 1.43
Net income	43,757	41,341	94,641	77,379
Unrealized appreciation (depreciation) on investments, net of tax		10	17	(5)
Comprehensive income	$ 43,757	$ 41,351	$ 94,658	$ 77,374
Regular Dividend
Earnings per common share:
Dividends declared and paid per common share:	$ 0.18	$ 0.15	$ 0.54	$ 0.45
Special Dividend
Earnings per common share:
Dividends declared and paid per common share:			$ 1.50