Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Jul. 31, 2013
Current assets:
Cash and cash equivalents	$ 119,448	$ 113,033
Accounts receivable, net of allowance for doubtful accounts of $785 and $598 as of April 30, 2014 and July 31, 2013, respectively	94,841	113,150
Inventory	120,423	116,280
Refundable and deferred income taxes	14,688	7,803
Other current assets	10,211	10,147
Total current assets	359,611	360,413
Property, plant, and equipment, net	113,622	110,983
Intangible assets, net	59,450	55,525
Goodwill	56,955	50,073
Deferred income taxes	6,864	5,439
Other assets	5,940	5,351
Total assets	602,442	587,784
Current liabilities:
Accounts payable	40,290	32,138
Accrued employee compensation and benefits	16,114	22,264
Accrued warranty	6,177	6,501
Accrued restructuring charges	910	2,848
Deferred revenue	9,201	9,218
Customer advances	3,271	3,256
Accrued income taxes		4,091
Accrued expenses, other	3,454	5,293
Other current liabilities	6,037	5,285
Total current liabilities	85,454	90,894
Long-term liabilities:
Accrued income taxes	2,335	5,031
Other long-term liabilities	7,409	5,463
Total long-term liabilities	9,744	10,494
Guarantees and commitments (Notes 18 and 19)
Stockholders' equity:
Common stock, $0.05 par value; 30,000,000 shares authorized and 12,376,745 shares issued and outstanding as of April 30, 2014; 30,000,000 shares authorized and 12,235,416 shares issued and outstanding as of July 31, 2013	619	612
Capital in excess of par value	123,434	114,381
Retained earnings	372,416	362,255
Accumulated other comprehensive income	10,775	9,148
Total stockholders' equity	507,244	486,396
Total liabilities and stockholders' equity	$ 602,442	$ 587,784