XML 40 R26.htm IDEA: XBRL DOCUMENT
v3.21.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Players Club Program (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Analysis of redemption activity, preceding period | 12 months
Obligations related to the players' club program | $ 9.7

X
- Definition The preceding period after the analysis of all redemption activity. + References No definition available. + Details
Name: | mcri_AnalysisOfRedemptionActivityPrecedingPeriod
Namespace Prefix: | mcri_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant