CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income	$ 84,684	$ 94,645
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,731	17,836
Stock-based compensation expense	7,180	10,311
Deferred income taxes	(309)	3,796
Asset Impairment Charges	13,821	0
Other	1,698	1,372
Changes in operating assets and liabilities (net of effects of business acquisitions/divestitures):
Accounts receivable	9,019	332
Inventories	(7,439)	(9,254)
Prepaid expenses and other assets	(5,653)	(2,204)
Accounts payable and accrued liabilities	(26,609)	(20,548)
Income taxes	1,790	616
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by operating activities	95,913	96,902
Investing activities:
Purchases of property, plant and equipment	(21,616)	(17,528)
Other	(4,419)	(1,810)
Net cash used in investing activities	(26,035)	(19,338)
Financing activities:
Payments of dividends	(34,447)	(33,488)
Purchase of treasury stock	(64,113)	(3,182)
Proceeds from exercise of stock options	5,212	22,468
Payments for employee taxes withheld form stock-based awards	(7,832)	(4,348)
Proceeds from borrowing on credit facilities	0	13,637
Repayment of borrowing on credit facilities	0	(13,568)
Other	133	210
Net cash used in financing activities	(101,047)	(18,271)
Effect of exchange rate changes on cash	(9,023)	(2,288)
Net (decrease) increase in cash and cash equivalents	(40,192)	57,005
Cash and cash equivalents, beginning of period	279,072	181,427
Cash and cash equivalents, end of period	$ 238,880	$ 238,432