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Stock Compensation Plan (Schedule Of Share Based Compensation Restricted Stock Units Activity) (Details) (Restricted Stock Units (RSUs) [Member], USD $) In Thousands, except Per Share data | 12 Months Ended
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Jul. 31, 2011
Restricted Stock Units (RSUs) [Member] |
Awards, outstanding beginning balance | 371
Awards, granted | 201
Awards, vested | (143)
Awards, forfeited | (21)
Awards, outstanding ending balance | 408
Weighted-average grant-date fair value, outstanding beginning balance | $ 30.07
Weighted-average grant-date fair value, granted | $ 37.03
Weighted-average grant-date fair value, vested | $ 41.22
Weighted-average grant-date fair value, forfeited | $ 27.86
Weighted-average grant-date fair value, outstanding ending balance | $ 33.47

X
- Definition The number of restricted stock units vested during the period. + Details
Name: | mtn_NumberOfRestrictedStockUnitsVestedDuringPeriod
Namespace Prefix: | mtn
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of restricted share units, that were forfeited during the reporting period. + Details
Name: | mtn_ShareBasedCompensationArrangementRestrictedStockUnitsForfeitedInPeriod
Namespace Prefix: | mtn
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value as of the grant date of restricted share units that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan. + Details
Name: | mtn_ShareBasedCompensationArrangementRestrictedStockUnitsForfeitedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | mtn
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net number of restricted share units granted during the period. + Details
Name: | mtn_ShareBasedCompensationArrangementRestrictedStockUnitsGrantedInPeriod
Namespace Prefix: | mtn
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of non-vested restricted share units, that validly exist and are outstanding as of the balance sheet date. + Details
Name: | mtn_ShareBasedCompensationArrangementRestrictedStockUnitsNonvestedNumber
Namespace Prefix: | mtn
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average fair value of nonvested restricted share units for which the employer is contingently obligated to issue equity instruments to an employee who has not yet satisfied service criteria necessary to gain title to underlying shares or units. + Details
Name: | mtn_ShareBasedCompensationArrangementRestrictedStockUnitsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix: | mtn
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average fair value as of grant date pertaining to restricted share units for which the grantee gained the right during the reporting period, by satisfying service requirements, to receive shares or units in accordance with the terms of the arrangement. + Details
Name: | mtn_ShareBasedCompensationArrangementRestrictedStockUnitsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | mtn
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested restricted share units issued during the period. + Details
Name: | mtn_ShareBasedCompensationArrangementRestriictedStockUnitsGrantedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | mtn
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration