Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Cash flows from operating activities:
Net income	$ 374,254	$ 256,519	$ 199,385
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	34,333	24,613	15,366
Amortization of intangibles	63,925	27,962	16,015
Amortization of debt issuance costs	1,570	131
Impairment charges		9,113
Deferred income tax benefit	(39,552)	(14,116)	(7,292)
Gain on disposition of property, plant & equipment	(2,231)	(35)	(91)
Stock-based compensation	12,500	9,387	6,776
Excess tax benefits from stock-based awards		(320)	(135)
Changes in assets and liabilities (excluding acquisitions):
Accounts receivable	(92,305)	(15,773)	41,324
Inventories	(56,619)	(15,582)	14,750
Prepaid expenses and other assets	(13,888)	719	(3,000)
Accounts payable	67,138	28,625	(26,632)
Accrued liabilities	63,075	26,016	(30)
Long-term liabilities and other	7,133	3,950	(8,576)
Net cash provided by operating activities	419,333	341,209	247,860
Cash flows from investing activities:
Purchases of property, plant & equipment	(115,027)	(51,976)	(42,283)
Proceeds from dispositions of property, plant & equipment	4,682	347	381
Proceeds from notes receivable		8,367	1,400
Acquisitions, net of cash acquired	(5,039)	(557,651)	(194,486)
Other	(1,271)	(560)	20
Net cash used in investing activities	(116,655)	(601,473)	(234,968)
Cash flows from financing activities:
Borrowings on revolving credit facility		360,000
Principal payments on revolving credit facility	(215,000)
Payments of debt issuance costs		(7,850)
Cash dividends paid	(69,409)	(62,970)	(57,381)
Purchase of treasury stock			(60,000)
Payments related to vesting of stock-based awards	(4,572)	(2,484)	(1,562)
Excess tax benefits from stock-based awards		320	135
Proceeds from issuance of common stock			141
Principal payments on capital lease obligations	(341)	(328)	(83)
Net cash provided by (used in) financing activities	(289,322)	286,688	(118,750)
Net increase (decrease) in cash and cash equivalents	13,356	26,424	(105,858)
Cash and cash equivalents, beginning of year	209,902	183,478	289,336
Cash and cash equivalents, end of year	223,258	209,902	183,478
Supplemental cash flow information:
Income taxes paid	198,619	128,409	115,124
Interest paid	8,558	672	180
Non-cash transactions:
Capital expenditures in accounts payable	$ 6,266	$ 3,538	$ 1,540