COMMITMENTS AND CONTINGENCIES (Details) (Self Insurance, USD $)	Dec. 31, 2013
Self Insurance
COMMITMENTS AND CONTINGENCIES
Maximum annual liability per insured	$ 425,000
Fixed portion of maximum annual liability per insured	250,000
Variable portion of maximum annual liability per insured (as a percent)	10.00%
Maximum amount of claims for computation of variable portion of maximum annual liability per insured	2,000,000
Maximum liability for workers' compensation under stop-loss agreement per claim	$ 500,000

Represents information related to the fixed portion of maximum liability for health plan coverage per insured per year.

No definition available.

Name:	mcri_FixedPortionOfMaximumLiabilityForHealthPlanPerInsuredPerYear
Namespace Prefix:	mcri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents information related to the maximum amount of claims for computation of variable portion of maximum annual liability per insured.

No definition available.

Name:	mcri_MaximumAmountOfClaimsForComputationOfVariablePortionOfMaximumLiabilityForHealthPlanPerInsuredPerYear
Namespace Prefix:	mcri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents information related to the maximum liability for health plan coverage per insured per year.

No definition available.

Name:	mcri_MaximumLiabilityForHealthPlanPerInsuredPerYear
Namespace Prefix:	mcri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the maximum liability per claim for workers' compensation under the stop-loss agreement.

No definition available.

Name:	mcri_MaximumLiabilityForWorkersCompensationPerClaim
Namespace Prefix:	mcri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents information related to the percentage of the variable portion of maximum liability for health plan coverage per insured per year.

No definition available.

Name:	mcri_PercentageOfVariablePortionOfMaximumLiabilityForHealthPlanPerInsuredPerYear
Namespace Prefix:	mcri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration