| **Commitments and Contingencies (Future Minimum Lease Payment) (Details) (USD $)In Thousands, unless otherwise specified** | Jul. 31, 2012 |
|----------------------------------------------------------------------------------------------------------------------------|---------------|
| **Commitments and Contingencies Disclosure [Abstract]**                                                                    |          |
| 2013                                                                                                                       | $ 28,214      |
| 2014                                                                                                                       | 27,091        |
| 2015                                                                                                                       | 26,098        |
| 2016                                                                                                                       | 23,924        |
| 2017                                                                                                                       | 22,303        |
| Thereafter                                                                                                                 | 154,718       |
| Total                                                                                                                      | $ 282,348     |

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| - Definition
Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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