Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Cash flows from operating activities:
Net income	$ 95,165	$ 67,573
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	10,958	6,788
Amortization of intangible assets	11,882	7,656
Impairment charges	9,113
Deferred income tax provision	(1,261)	(1,679)
(Gain) loss on disposition of property, plant and equipment	47	(78)
Stock-based compensation expense	4,679	3,327
Excess tax benefits from stock-based awards	(291)	(114)
Changes in assets and liabilities (excluding acquisitions):
Accounts receivable	(62,347)	(17)
Inventories	(28,430)	(15,477)
Prepaid income taxes, expenses and other	(8,083)	(10,391)
Accounts payable	18,922	10,120
Accrued liabilities	1,231	(12,139)
Other liabilities	281	(2,407)
Net cash provided by operating activities	51,866	53,162
Cash flows from investing activities:
Purchases of property, plant and equipment	(24,539)	(16,161)
Proceeds from dispositions of property, plant and equipment	47	41
Proceeds from notes receivable	8,367	1,400
Acquisitions, net of cash acquired		(49,265)
Other		15
Net cash used in investing activities	(16,125)	(63,970)
Cash flows from financing activities:
Regular cash dividends paid	(31,485)	(28,824)
Principal payments on capital lease obligations	(170)
Excess tax benefits from stock-based awards	291	114
Payments related to vesting of stock-based awards	(2,484)	(1,562)
Net cash used in financing activities	(33,848)	(30,272)
Net increase (decrease) in cash and cash equivalents	1,893	(41,080)
Cash and cash equivalents, beginning of period	183,478	289,336
Cash and cash equivalents, end of period	185,371	248,256
Supplemental cash flow information:
Income taxes paid	63,301	59,547
Interest paid	342	1
Non-cash transactions:
Capital expenditures in accounts payable	$ 585	$ 220