Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Oct. 31, 2012	Jul. 31, 2012
Current assets:
Cash and cash equivalents	$ 170,938	$ 187,011
Accounts receivable, net of allowance for doubtful accounts of $420 and $344 as of October 31, 2012 and July 31, 2012, respectively	78,282	96,117
Inventories	123,325	108,944
Refundable and deferred income taxes	11,860	9,786
Other current assets	7,732	6,937
Total current assets	392,137	408,795
Property, plant, and equipment, net	101,279	96,769
Goodwill and intangible assets, net	35,423	36,189
Deferred income taxes	7,725	10,749
Other assets	6,266	5,494
Total Assets	542,830	557,996
Current liabilities:
Accounts payable	37,843	38,200
Accrued liabilities	29,522	41,746
Advance payments and deferred revenue	10,583	14,323
Accrued income taxes		5,670
Total current liabilities	77,948	99,939
Long-term liabilities:
Accrued income taxes	4,756	4,675
Other long-term liabilities	7,448	7,063
Total long-term liabilities	12,204	11,738
Commitments and guarantees (Note 12)
Stockholders' equity:
Common stock, $.05 par value	612	608
Capital in excess of par value	103,915	100,222
Retained earnings	342,692	343,186
Accumulated other comprehensive income	5,459	2,303
Total stockholders' equity	452,678	446,319
Total Liabilities and Stockholders' Equity	$ 542,830	$ 557,996