Long-Term Debt (Schedule Of Debt Instruments) (Details) - USD ($) $ in Thousands	6 Months Ended
Jan. 31, 2016	Jul. 31, 2015	Jan. 31, 2015
Total debt	$ 695,535	$ 816,830	$ 635,935
Less: Current maturities	13,340	10,154	1,196
Long-term debt	$ 682,195	806,676	634,739
Stated percentage in the debt instrument	6.50%
Credit Facility Revolver [Member]
Total debt	$ 64,500	185,000	0
Fiscal year maturity	2020
Term Loan [Member]
Total debt	$ 246,875	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	$ 320,277	317,455	314,657
Fiscal year maturity	2063
Other [Member]
Total debt	$ 11,308	$ 11,800	$ 12,503
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

No definition available.

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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
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Name Accounting Standards Codification
-Topic 210
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-Section S99
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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

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-Publisher FASB
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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
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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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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