CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income	$ 64,341	$ 71,051
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	11,421	11,672
Stock-based compensation expense	5,471	5,384
Deferred income taxes	(3,866)	1,272
Equity in losses of unconsolidated affiliate	505	0
Other	121	1,664
Changes in operating assets and liabilities (net of effects of business acquisitions/divestitures):
Accounts receivable	(4,157)	6,209
Inventories	15,018	(1,311)
Prepaid expenses and other assets	(2,436)	(2,621)
Accounts payable and accrued liabilities	11,990	(39,777)
Income taxes	481	(436)
Net cash provided by operating activities	98,889	53,107
Investing activities:
Purchases of property, plant and equipment	(14,511)	(13,100)
Other	(1,881)	(3,406)
Net cash used in investing activities	(16,392)	(16,506)
Financing activities:
Payment of dividends	(22,837)	(23,136)
Proceeds from Stock Options Exercised	471	4,686
Payments for employee taxes withheld from stock-based awards	(2,638)	(7,733)
Purchase of treasury stock	(3,593)	0
Other	(231)	134
Net cash used in financing activities	(28,828)	(26,049)
Effect of exchange rate changes on cash	6,276	179
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	59,945	10,731
Cash and cash equivalents, beginning of period	217,643	279,072
Cash and cash equivalents, end of period	$ 277,588	$ 289,803