Other Intangible Assets (Schedule Of Amortizable Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jan. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net, beginning balance	$ 1,439	$ 2,041	$ 4,394
Amortization	(235)	(602)
Intangible assets, net, ending balance	4,394	1,439	4,394
Useful life	11 years 7 months 6 days
Additions to Other Assets, Amount	3,190
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net, beginning balance	1,350	1,902
Amortization	(199)	(552)
Intangible assets, net, ending balance	4,211	1,350
Useful life	11 years 11 months 9 days
Additions to Other Assets, Amount	3,060
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net, beginning balance	89	139
Amortization	(36)	(50)
Intangible assets, net, ending balance	183	89
Useful life	3 years 7 months 2 days
Additions to Other Assets, Amount	$ 130