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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Players Club Program (Details)	6 Months Ended
	Jun. 30, 2025
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Analysis of redemption activity, preceding period	12 months

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- Definition

The preceding period after the analysis of all redemption activity.

+ References

No definition available.

+ Details

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Namespace Prefix:	mcri_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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