Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Cash flows from operating activities
Net income	$ 13,708	$ 55,042	$ 91,041
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	30,441	21,510	17,473
Amortization	32,961	20,849	17,357
Stock-based compensation expense	12,076	15,562	9,615
Deferred income taxes	15,351	(2,062)	(7,520)
Amortization of right-of-use assets	10,942	0	0
Non-cash interest expense	5,372	594	417
Inventory step-up amortization	20,100	346	902
Fair value adjustments to contingent consideration	(6,370)	113	6
Other non-cash items, net	3,839	(2,993)	(249)
Changes in assets and liabilities, net of effects of acquisitions/dispositions:
Accounts receivable	25,748	(23,048)	(3,700)
Inventories	12,363	(28,711)	(3,785)
Prepaid expenses and other assets	6,481	(2,364)	(5,169)
Accounts payable and other liabilities	(1,719)	13,325	10,614
Income taxes	(32,769)	(1,232)	(1,090)
Operating lease payments	(11,667)	0	0
Net cash provided by operating activities	136,857	66,931	125,912
Cash flows from investing activities
Capital expenditures	(33,796)	(95,438)	(37,698)
Proceeds from sale of business, net of cash retained	2,287	3,053	0
Acquisition of businesses, net of cash acquired	(721,350)	(40,644)	(87,488)
Net cash used in investing activities	(752,859)	(133,029)	(125,186)
Cash flows from financing activities
Proceeds from issuance of long-term debt	400,000	0	200,000
Repayments of long-term debt	(43,625)	(15,207)	0
Borrowings under revolving credit facility	388,900	50,000	82,300
Repayments under revolving credit facility	(32,900)	(7,000)	(208,300)
Proceeds from issuance of convertible debt	168,000	0	0
Dividends paid	(4,471)	(8,350)	(7,091)
Debt issuance costs	(17,081)	0	(2,698)
Finance lease payments	(399)	0	0
Contingent consideration payments	(1,691)	0	0
Purchases of treasury stock	(4,063)	(4,741)	(7,074)
Net cash provided by financing activities	852,670	14,702	57,137
Effect of exchange rate changes on cash and cash equivalents	(3,332)	1,834	(350)
Increase (decrease) in cash and cash equivalents	233,336	(49,562)	57,513
Cash and cash equivalents at beginning of period	44,535	94,097	36,584
Cash and cash equivalents at end of period	277,871	44,535	94,097
Supplemental disclosures of cash flow information:
Cash interest payments	32,415	9,296	5,156
Cash income tax payments	10,244	19,024	35,251
Accruals related to purchases of property and equipment	$ 2,411	$ 3,311	$ 2,281