Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Cash flows from operating activities:
Net income	$ 41,108	$ 30,988
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,414	3,444
Amortization of intangibles	2,902	2,768
Impairment charges	710
Deferred income tax provision (benefit)	1,266	(2,185)
Gain on disposal of bus business	(7,825)
Loss on disposition of property, plant and equipment	34
Stock-based compensation	1,376	669
Excess tax benefits from stock-based awards	(737)	(60)
Changes in assets and liabilities (excluding acquisitions and disposition):
Accounts receivable	21,110	16,317
Inventories	(43,288)	(38,822)
Prepaid income taxes, expenses and other	(1,860)	(1,690)
Accounts payable	3,916	1,346
Accrued liabilities	(14,264)	(102)
Other liabilities	(2,009)	1,766
Net cash provided by operating activities	5,853	14,439
Cash flows from investing activities:
Purchases of property, plant and equipment	(5,131)	(5,893)
Proceeds from dispositions of property, plant and equipment	65
Proceeds from dispositions of investments	700
Proceeds from notes receivable	2,700
Proceeds from sale of bus business, net of bus cash on hand	97,677
Acquisitions, net of cash acquired	(33,774)	(3,914)
Other	219
Net cash provided by (used in) investing activities	62,456	(9,807)
Cash flows from financing activities:
Regular cash dividends paid	(12,253)	(9,527)
Excess tax benefits from stock-based awards	737	60
Proceeds from issuance of common stock	2,293	691
Payments related to vesting of stock-based awards	(705)
Net cash used in financing activities	(9,928)	(8,776)
Net increase (decrease) in cash and equivalents	58,381	(4,144)
Cash and cash equivalents, beginning of period	236,601	218,642
Cash and cash equivalents, end of period	294,982	214,498
Supplemental cash flow information:
Income taxes paid	34,970	25,250
Interest paid	132	80
Non-cash transactions:
Capital expenditures in accounts payable	1,518	325
Other accounts receivable from bus business sale	8,329
Special dividend payable	$ 53,290