Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	3 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Cash flows from operating activities:
Net income	$ 22,358	$ 23,688
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,514	3,340
Amortization of intangibles	2,847	2,075
Impairment of trademarks		2,036
Deferred income tax provision	444	3,000
(Gain)/loss on disposition of property, plant and equipment	2	(26)
Stock-based compensation	161	845
Excess tax benefits from stock-based awards		(446)
Gain on involuntary conversion of assets		(2,117)
Changes in assets and liabilities (excluding acquisition):
Accounts receivable	4,245	43,818
Inventories	1,373	(14,050)
Notes receivable	26
Prepaid expenses and other	(3,251)	(476)
Accounts payable	(2,437)	(27,512)
Accrued liabilities	(7,870)	(25,523)
Other liabilities	929	1,042
Net cash provided by operating activities	22,341	9,694
Cash flows from investing activities:
Purchases of property, plant and equipment	(2,041)	(16,642)
Proceeds from dispositions of property, plant and equipment		648
Proceeds from disposition of investments		2,150
Insurance proceeds from involuntary conversion of assets		2,496
Acquisition of operating subsidiary	(170)	(99,562)
Other	200
Net cash used in investing activities	(2,011)	(110,910)
Cash flows from financing activities:
Cash dividends	(8,227)	(5,578)
Purchase of treasury stock	(20,000)
Excess tax benefits from stock-based awards		446
Proceeds from issuance of common stock		344
Net cash used in financing activities	(28,227)	(4,788)
Net decrease in cash and equivalents	(7,897)	(106,004)
Cash and cash equivalents, beginning of period	215,435	247,751
Cash and cash equivalents, end of period	207,538	141,747
Supplemental cash flow information:
Income taxes paid	23,217	28,315
Interest paid	143	70
Non-cash transactions:
Capital expenditures in accounts payable	144	321
Common stock issued in business acquisition		$ 90,531