XML 32 R21.htm IDEA: XBRL DOCUMENT
v3.22.2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentrations of Credit Risk and Credit Losses (Details) $ in Millions | Jun. 30, 2022 USD ($)
--- | ---
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Gaming and non-gaming receivables | $ 0.1

X
- Definition Represents gaming and non-gaming receivables. + References No definition available. + Details
Name: | mcri_GamingAndNonGamingReceivables
Namespace Prefix: | mcri_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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