Long-Term Debt (Schedule Of Debt Instruments) (Details) - USD ($) $ in Thousands	9 Months Ended
Apr. 30, 2016	Jul. 31, 2015	Apr. 30, 2015
Total debt	$ 629,178	$ 816,830	$ 636,749
Less: Current maturities	13,349	10,154	256,953
Long-term debt	$ 615,829	806,676	379,796
Stated percentage in the debt instrument	6.50%
Credit Facility Revolver [Member]
Total debt	$ 0	185,000	0
Fiscal year maturity	2020
Term Loan [Member]
Total debt	$ 243,750	250,000	0
Fiscal year maturity	2020
Industrial Development Bonds [Member]
Total debt	$ 0	0	41,200
Fiscal year maturity	2020
Employee Housing Bonds [Member]
Total debt	$ 52,575	52,575	52,575
6.50% Notes [Member]
Total debt	$ 0	0	215,000
Fiscal year maturity	2019
Stated percentage in the debt instrument	6.50%
Long term debt interest rate	6.50%
Canyons Obligation [Member]
Total debt	$ 321,688	317,455	316,056
Fiscal year maturity	2063
Other [Member]
Total debt	$ 11,165	$ 11,800	$ 11,918
Maximum [Member] \| Employee Housing Bonds [Member]
Fiscal year maturity, end	May 01, 2039
Maximum [Member] \| Other [Member]
Fiscal year maturity, end	Jul. 31, 2029
Minimum [Member] \| Employee Housing Bonds [Member]
Fiscal year maturity, start	Jun. 01, 2027
Minimum [Member] \| Other [Member]
Fiscal year maturity, start	Jul. 31, 2016

Debt Instrument, Year of Maturity

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- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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-Topic 210
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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- Definition

Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Publisher SEC
-Name Regulation S-X (SX)
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-Section 02
-Paragraph 20, 22
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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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