Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Cash flows from operating activities:
Net income	$ 50,497	$ 38,925
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	5,405	3,324
Amortization of intangible assets	6,028	3,689
Deferred income tax provision	2,289	1,177
Gain on disposition of property, plant and equipment	(1)	(13)
Stock-based compensation expense	2,279	1,565
Excess tax benefits from stock-based awards	(291)	(114)
Changes in assets and liabilities (excluding acquisitions):
Accounts receivable	(47,614)	35,870
Inventories	(25,255)	(5,497)
Prepaid income taxes, expenses and other	(5,889)	(4,267)
Accounts payable	28,667	(13,743)
Accrued liabilities	2,579	(7,479)
Other liabilities	198	(3,412)
Net cash provided by operating activities	18,892	50,025
Cash flows from investing activities:
Purchases of property, plant and equipment	(15,922)	(8,541)
Proceeds from dispositions of property, plant and equipment	40	13
Proceeds from notes receivable	8,367
Acquisitions, net of cash acquired		(2,915)
Other		7
Net cash used in investing activities	(7,515)	(11,436)
Cash flows from financing activities:
Regular cash dividends paid	(15,743)	(14,412)
Principal payments on capital lease obligations	(86)
Excess tax benefits from stock-based awards	291	114
Net cash used in financing activities	(15,538)	(14,298)
Net increase (decrease) in cash and cash equivalents	(4,161)	24,291
Cash and cash equivalents, beginning of period	183,478	289,336
Cash and cash equivalents, end of period	179,317	313,627
Supplemental cash flow information:
Income taxes paid	35,326	36,246
Interest paid	174
Non-cash transactions:
Capital expenditures in accounts payable	$ 532	$ 353