Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Cash flows from operating activities
Net income	$ 55,042	$ 91,041	$ 71,378
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	21,510	17,473	15,045
Amortization	20,849	17,357	18,407
Stock-based compensation expense	15,562	9,615	8,844
Deferred income taxes	(2,062)	(7,520)	118
Other non-cash items, net	(1,940)	1,076	1,102
Changes in assets and liabilities, net of effects of business acquisitions/divestitures:
Accounts receivable	(23,048)	(3,700)	(12,860)
Inventories	(28,711)	(3,785)	887
Prepaid expenses and other assets	(2,364)	(5,169)	(957)
Accounts payable and other liabilities	13,325	10,614	7,124
Income taxes	(1,232)	(1,090)	(895)
Net cash provided by operating activities	66,931	125,912	108,193
Cash flows from investing activities
Capital expenditures	(95,438)	(37,698)	(27,065)
Proceeds from disposal of fixed assets	0	0	47
Proceeds from sale of business, net of cash retained and disposal costs	3,053	0	0
Acquisition of businesses, net of cash acquired	(40,644)	(87,488)	(70,044)
Net cash used in investing activities	(133,029)	(125,186)	(97,062)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	200,000	0
Repayments of long-term debt	(15,207)	0	0
Borrowings under revolving credit facility	50,000	82,300	74,000
Repayments under revolving credit facility	(7,000)	(208,300)	(64,000)
Debt issuance costs	0	(2,698)	0
Dividends paid	(8,350)	(7,091)	(5,841)
Purchases of treasury stock	(4,741)	(7,074)	(6,910)
Net cash provided by (used in) financing activities	14,702	57,137	(2,751)
Effect of exchange rate changes on cash and cash equivalents	1,834	(350)	(163)
(Decrease) increase in cash and cash equivalents	(49,562)	57,513	8,217
Cash and cash equivalents at beginning of period	94,097	36,584	28,367
Cash and cash equivalents at end of period	44,535	94,097	36,584
Supplemental disclosures of cash flow information:
Cash interest payments	9,296	5,156	3,455
Cash income tax payments	19,024	35,251	35,858
Accruals related to purchases of property and equipment	$ 3,311	$ 2,281	$ 192