Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Cash flows from operating activities:
Net income	$ 143,527	$ 95,165
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	16,911	10,958
Amortization of intangible assets	33,494	11,882
Amortization of debt issuance costs	785
Impairment charges		9,113
Deferred income tax benefit	(4,291)	(1,261)
(Gain) loss on disposition of property, plant and equipment	(2,262)	47
Stock-based compensation expense	5,892	4,679
Excess tax benefits from stock-based awards		(291)
Changes in assets and liabilities (excluding acquisitions):
Accounts receivable	(96,712)	(62,347)
Inventories	(73,729)	(28,430)
Prepaid income taxes, expenses and other	(8,455)	(8,083)
Accounts payable	28,591	18,922
Accrued liabilities	6,353	1,231
Other liabilities	2,712	281
Net cash provided by operating activities	52,816	51,866
Cash flows from investing activities:
Purchases of property, plant and equipment	(50,924)	(24,539)
Proceeds from dispositions of property, plant and equipment	4,554	47
Proceeds from notes receivable		8,367
Acquisitions	(5,039)
Other	(2,213)
Net cash used in investing activities	(53,622)	(16,125)
Cash flows from financing activities:
Principal payments on revolving credit facility	(35,000)
Regular cash dividends paid	(34,704)	(31,485)
Principal payments on capital lease obligations	(165)	(170)
Excess tax benefits from stock-based awards		291
Payments related to vesting of stock-based awards	(4,572)	(2,484)
Net cash used in financing activities	(74,441)	(33,848)
Net increase (decrease) in cash and cash equivalents	(75,247)	1,893
Cash and cash equivalents, beginning of period	209,902	183,478
Cash and cash equivalents, end of period	134,655	185,371
Supplemental cash flow information:
Income taxes paid	97,180	63,301
Interest paid	4,466	342
Non-cash transactions:
Capital expenditures in accounts payable	$ 2,904	$ 585