CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Operating activities:
Net income	$ 131,258	$ 91,060	$ 95,645
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	23,799	25,442	27,303
Non-cash portion of stock-based compensation expense	12,092	9,980	9,495
Gain on sale of business, net	0	(4,666)	0
Deferred income taxes	7,825	33,656	(8,618)
Other Noncash Income (Expense)	2,347	(15)	504
Changes in operating assets and liabilities (net of effects of business acquisitions/divestitures):
Accounts receivable	3,496	(16,612)	766
Inventories	(9,922)	(7,563)	(5,687)
Prepaid expenses and other assets	368	1,747	1,812
Accounts payable and accrued liabilities	(11,903)	13,106	21,751
Income taxes	2,851	(3,093)	1,061
Net cash provided by operating activities	162,211	143,042	144,032
Investing activities:
Purchases of property, plant and equipment	(32,825)	(21,777)	(15,167)
Sale of business, net of cash transferred with business	0	19,141	0
Other	(1,638)	(269)	(86)
Net cash used in investing activities	(34,463)	(2,905)	(15,253)
Financing activities:
Payment of dividends	(44,732)	(42,873)	(41,880)
Proceeds from exercise of stock options	23,466	12,099	19,728
Purchase of treasury stock	(3,182)	(1,462)	0
Proceeds from borrowing on credit facilities	13,637	23,221	180,320
Repayment of borrowing on credit facilities	13,568	78,419	244,268
Principal payments on debt	0	0	(49,302)
Other	(3,249)	(3,246)	(839)
Net cash used in financing activities	(27,628)	(90,680)	(136,241)
Effect of exchange rate changes on cash and cash equivalents	(2,475)	(1,974)	178
Net increase (decrease) in cash and cash equivalents	97,645	47,483	(7,284)
Cash and cash equivalents, beginning of period	181,427	133,944	141,228
Cash and cash equivalents, end of period	279,072	181,427	133,944
Cash paid during the period for:
Interest	2,651	2,976	5,766
Income taxes	$ 24,335	$ 33,267	$ 31,885