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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | 12 Months Ended
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Dec. 31, 2012
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Maximum period from approval during which number of conditions must be met | 6 months
Land improvements | Minimum |
Property and Equipment |
Estimated useful lives | 15 years
Land improvements | Maximum |
Property and Equipment |
Estimated useful lives | 40 years
Buildings | Minimum |
Property and Equipment |
Estimated useful lives | 30 years
Buildings | Maximum |
Property and Equipment |
Estimated useful lives | 40 years
Building improvements | Minimum |
Property and Equipment |
Estimated useful lives | 15 years
Building improvements | Maximum |
Property and Equipment |
Estimated useful lives | 40 years
Furniture | Minimum |
Property and Equipment |
Estimated useful lives | 5 years
Furniture | Maximum |
Property and Equipment |
Estimated useful lives | 10 years
Equipment | Minimum |
Property and Equipment |
Estimated useful lives | 3 years
Equipment | Maximum |
Property and Equipment |
Estimated useful lives | 20 years

X
- Definition Represents the maximum period from approval during which a number of conditions must be met before the license can be issued. + References No definition available. + Details
Name: | mcri_MaximumPeriodFromApprovalDuringWhichNumberOfConditionsMustBeMet
Namespace Prefix: | mcri_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration