Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 23,329	$ 19,414
Adjustments to reconcile net cash provided by operating activities:
(Benefit from) provision for deferred income taxes	(4,224)	3,761
Depreciation and amortization	16,405	12,537
Loss on investment	484
Change in fair value of contingent consideration	183	(120)
Share-based compensation expense	8,727	7,957
Excess tax benefit from share-based compensation	(3,449)	(1,992)
Write-down of inventory to net realizable value	3,111	2,560
Allowance for doubtful accounts	187	216
Other		689
Loss (gain) on sale of property, plant and equipment	27	(6)
Net changes in operating assets and liabilities, exclusive of acquisition-related assets and liabilities:
Accounts receivable	18,558	15,885
Inventory	(6,978)	(24,852)
Refundable income taxes	(354)	(4,226)
Other current assets	753	(940)
Accounts payable	7,774	(12,011)
Accrued liabilities	(10,008)	(4,286)
Deferred revenue	(92)	(2,031)
Accrued income taxes	(9,741)	(3,709)
Other liabilities	(1,574)	2,279
NET CASH FLOWS PROVIDED BY OPERATING ACTIVITIES	43,118	11,125
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant, and equipment	(13,647)	(19,885)
Purchases of marketable securities	(624)
Acquisition of business, net of cash acquired	(10,561)	(79,273)
Proceeds from the sale of property, plant, and equipment	140	83
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(24,692)	(99,075)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of stock pursuant to exercise of stock options, employee stock purchase plan, restricted stock plans, and non-employee director stock plan	4,454	5,086
Shares repurchased for taxes for vested employee restricted stock grants	(6,281)	(4,498)
Contingent consideration payment		(340)
Excess tax benefit from share-based compensation	3,449	1,992
Borrowings of other credit facilities		2,230
Repayments of other credit facilities		(3,014)
Repurchase of common stock	(10,579)	(6,020)
Dividends paid to shareholders	(3,727)	(3,889)
NET CASH FLOWS USED IN FINANCING ACTIVITIES	(12,684)	(8,453)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	673	739
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	6,415	(95,664)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	113,033	187,011
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 119,448	$ 91,347