Long-Term Debt (Schedule Of Long-Term Debt) (Details)			12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Jul. 31, 2014 USD ($)	Jul. 31, 2013 USD ($)	Jul. 31, 2014 6.59% Unsecured Senior Notes Due November 14, 2013 [Member] USD ($)	Jul. 31, 2013 6.59% Unsecured Senior Notes Due November 14, 2013 [Member] USD ($)	Jul. 31, 2014 5.48% Unsecured Senior Notes Due June 1, 2017 [Member] USD ($)	Jul. 31, 2013 5.48% Unsecured Senior Notes Due June 1, 2017 [Member] USD ($)	Jul. 31, 2014 5.48% Unsecured Senior Notes Due September 28, 2017 [Member] USD ($)	Jul. 31, 2013 5.48% Unsecured Senior Notes Due September 28, 2017 [Member] USD ($)	Jul. 31, 2014 5.48% Unsecured Senior Notes Due November 30, 2017 [Member] USD ($)	Jul. 31, 2013 5.48% Unsecured Senior Notes Due November 30, 2017 [Member] USD ($)	Jul. 31, 2014 3.72% Unsecured Senior Notes Due March 27, 2024 [Member] USD ($)	Mar. 27, 2014 3.72% Unsecured Senior Notes Due March 27, 2024 [Member]	Jul. 31, 2014 2.019% Guaranteed Senior Note Due May 18, 2014 [Member] JPY (¥)	Jul. 31, 2013 2.019% Guaranteed Senior Note Due May 18, 2014 [Member] USD ($)	Jul. 31, 2014 Variable Rate Guaranteed Senior Note Due May 19, 2019 [Member] JPY (¥)	Jul. 31, 2014 Variable Rate Guaranteed Senior Note Due May 19, 2019 [Member] USD ($)	Jul. 31, 2014 Capitalized Lease Obligations And Other, With Various Maturity Dates And Interest Rates [Member] USD ($)	Jul. 31, 2013 Capitalized Lease Obligations And Other, With Various Maturity Dates And Interest Rates [Member] USD ($)	Jul. 31, 2014 Terminated Interest Rate Swap Contracts [Member] USD ($)	Jul. 31, 2013 Terminated Interest Rate Swap Contracts [Member] USD ($)
Debt Instrument [Line Items]
Total	$ 245,464,000	$ 201,438,000		$ 80,000,000	$ 50,000,000	$ 50,000,000	$ 25,000,000	$ 25,000,000	$ 25,000,000	$ 25,000,000	$ 125,000,000			$ 16,848,000		$ 16,051,000	$ 3,177,000	$ 2,520,000	$ 1,236,000	$ 2,070,000
Less current maturities	1,738,000	98,664,000
Total long-term debt	243,726,000	102,774,000
Interest rate percentage			6.59%		5.48%		5.48%		5.48%		3.72%	3.72%	2.019%			0.56%
Senior unsecured notes, due date			Nov. 14, 2013		Jun. 01, 2017		Sep. 28, 2017		Nov. 30, 2017		Mar. 27, 2024		May 18, 2014		May 19, 2019
Long-term debt, principal payment			$ 80,000,000		$ 50,000,000		$ 25,000,000		$ 25,000,000		$ 125,000,000		¥ 1,650,000,000		¥ 1,650,000,000