Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash flows from operating activities:
Net income	$ 208,158	$ 143,527
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	18,619	16,911
Amortization of intangibles	27,354	33,494
Amortization of debt issuance costs	785	785
Deferred income tax provision (benefit)	23,312	(4,291)
Gain on disposition of property, plant and equipment	(1,482)	(2,262)
Stock-based compensation expense	8,731	5,892
Changes in assets and liabilities (excluding acquisitions):
Accounts receivable	(138,930)	(96,712)
Inventories	(129,875)	(73,729)
Prepaid income taxes, expenses and other	(7,140)	(8,455)
Accounts payable	27,235	28,591
Accrued liabilities	11,283	6,353
Long-term liabilities and other	8,795	2,712
Net cash provided by operating activities	56,845	52,816
Cash flows from investing activities:
Purchases of property, plant and equipment	(63,003)	(50,924)
Proceeds from dispositions of property, plant and equipment	3,552	4,554
Acquisitions		(5,039)
Other	960	(2,213)
Net cash used in investing activities	(58,491)	(53,622)
Cash flows from financing activities:
Principal payments on revolving credit facility	(65,000)	(35,000)
Regular cash dividends paid	(38,994)	(34,704)
Principal payments on capital lease obligations	(186)	(165)
Payments related to vesting of stock-based awards	(7,657)	(4,572)
Net cash used in financing activities	(111,837)	(74,441)
Net decrease in cash and cash equivalents	(113,483)	(75,247)
Cash and cash equivalents, beginning of period	223,258	209,902
Cash and cash equivalents, end of period	109,775	134,655
Supplemental cash flow information:
Income taxes paid	137,169	97,180
Interest paid	2,114	4,466
Non-cash transactions:
Capital expenditures in accounts payable	$ 4,929	$ 2,904