Income Taxes (Schedule Of Temporary Differences That Give Rise To Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Income Taxes [Abstract]
Accrued expenses	$ 11,118	$ 11,580
Compensation and retirement plans	32,317	23,578
NOL and tax credit carryforwards	3,471	3,279
LIFO and inventory reserves	5,482	5,037
Other	4,470	3,890
Deferred tax assets, gross	56,858	47,364
Valuation allowance	(3,471)	(3,228)
Net deferred tax assets	53,387	44,136
Depreciation and amortization	(49,901)	(45,737)
Other	(1,025)	(663)
Deferred tax liabilities	(50,926)	(46,400)
Prepaid tax assets	4,392	4,015
Net tax asset	$ 6,853	$ 1,751