CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Operating activities:
Net income	$ 35,046	$ 33,481
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,509	5,635
Stock-based compensation expense	4,129	3,574
Deferred income taxes	(625)	(1,175)
Equity in losses of unconsolidated affiliate	0	174
Other	(187)	(266)
Changes in operating assets and liabilities:
Accounts receivable	(13,302)	(11,371)
Inventories	(16,579)	14,758
Prepaid expenses and other assets	(655)	(1,398)
Accounts payable and accrued liabilities	9,499	17,363
Income taxes	1,656	2,063
Net cash provided by operating activities	27,491	62,838
Investing activities:
Purchases of property, plant and equipment	(11,328)	(9,321)
Other	2	119
Net cash used in investing activities	(11,326)	(9,202)
Financing activities:
Payment of dividends	(11,595)	(11,391)
Proceeds from exercise of stock options	151	160
Payments for employee taxes withheld from stock-based awards	(3,339)	(2,617)
Purchase of treasury stock	(18,924)	(2,720)
Proceeds from borrowing on credit facilities	56,200	12,971
Repayment of borrowing on credit facilities	(27,200)	(12,988)
Other	115	34
Net cash used in financing activities	(4,592)	(16,551)
Effect of exchange rate changes on cash and cash equivalents	(1,355)	1,605
Net increase in cash and cash equivalents	10,218	38,690
Cash and cash equivalents, beginning of period	147,335	217,643
Cash and cash equivalents, end of period	$ 157,553	$ 256,333