| **Long-Term Debt (Schedule Of Debt Instruments) (Details) (USD $)In Thousands, unless otherwise specified** | 3 Months Ended |           |           | 12 Months Ended |        |        | 12 Months Ended |          |          |          |          |          | 12 Months Ended |           |           |         |         |         | 3 Months Ended              |
|-------------------------------------------------------------------------------------------------------------|----------------|-----------|-----------|-----------------|--------|--------|-----------------|----------|----------|----------|----------|----------|-----------------|-----------|-----------|---------|---------|---------|-----------------------------|
||
| Total debt                                                                                                  | $ 490,373      | $ 490,765 | $ 491,440 | $ 0             | $ 0    | $ 0    | $ 41,200        | $ 41,200 | $ 41,200 | $ 52,575 | $ 52,575 | $ 52,575 | $ 390,000       | $ 390,000 | $ 390,000 | $ 6,598 | $ 6,990 | $ 7,665 |                        |   |   |   |
| Less: Current maturities                                                                                    | 848            | 990       | 1,063     |            |   |   |            |     |     |     |     |     |            |      |      |    |    |    |                        |   |   |   |
| Long-term debt                                                                                              | $ 489,525      | $ 489,775 | $ 490,377 |            |   |   |            | $ 41,200 |     |     |     |     |            | $ 390,000 |      |    |    |    |                        |   |   |   |
| Fiscal year maturity                                                                                        | 2019           |      |      | 2016            |   |   | 2020            |     |     |     |     |     | 2019            |      |      |    |    |    |                        |   |   |   |
| Fiscal year maturity, start                                                                                 |           |      |      |            |   |   |            |     |     |     |     |     |            |      |      |    |    |    |                        |   | Jun.        01,         2027 | Jul. 31,         2013 |
| Fiscal year maturity, end                                                                                   |           |      |      |            |   |   |            |     |     |     |     |     |            |      |      |    |    |    | May        01,         2039 | Jul. 31,         2029 |   |   |
| Stated percentage in the debt instrument                                                                    | 6.50%          |      |      |            |   |   |            |     |     |     |     |     |            | 6.50%     |      |    |    |    |                        |   |   |   |
| Long term debt interest rate                                                                                |           |      |      |            |   |   |            |     |     |     |     |     | 6.50%           |      |      |    |    |    |                        |   |   |   |

| X                                                                                                                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Debt Instrument, Year of Maturity
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| - Definition
The average effective interest rate during the reporting period.
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| - Definition
Interest rate stated in the contractual 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.
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| - Definition
Carrying amount of long-term debt, net of 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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