Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jul. 31, 2012
Current assets:
Cash and cash equivalents	$ 175,125	$ 187,011
Accounts receivable, net of allowance for doubtful accounts of $482 and $344 as of January 31, 2013 and July 31, 2012, respectively	86,176	96,117
Inventory	125,666	108,944
Refundable and deferred income taxes	7,088	9,786
Other current assets	9,082	6,937
Total current assets	403,137	408,795
Property, plant, and equipment, net	105,715	96,769
Goodwill and intangible assets, net	34,657	36,189
Deferred income taxes	10,391	10,749
Other assets	6,789	5,494
Total Assets	560,689	557,996
Current liabilities:
Accounts payable	37,463	38,200
Accrued liabilities	30,809	41,746
Advance payments and deferred revenue	13,874	14,323
Accrued income taxes		5,670
Total current liabilities	82,146	99,939
Long-term liabilities:
Accrued income taxes	5,242	4,675
Other long-term liabilities	7,370	7,063
Total long-term liabilities	12,612	11,738
Commitments and guarantees (Note 12)
Stockholders' equity:
Common stock, $.05 par value	612	608
Capital in excess of par value	107,963	100,222
Retained earnings	349,350	343,186
Accumulated other comprehensive income	8,006	2,303
Total stockholders' equity	465,931	446,319
Total Liabilities and Stockholders' Equity	$ 560,689	$ 557,996