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TAXES (Details 3) (USD $)
12 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2012
Reconciliation of the beginning and ending amount of unrecognized tax benefits          
Liability related to uncertain tax positions which is recorded as a current liability $ 0us-gaap_LiabilityForUncertainTaxPositionsCurrent $ 0us-gaap_LiabilityForUncertainTaxPositionsCurrent      
Accrued interest, related to unrecognized tax benefits 0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense 0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense      
IRS          
Reconciliation of the beginning and ending amount of unrecognized tax benefits          
Balance - Beginning of year     1,501,000us-gaap_UnrecognizedTaxBenefits
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
   
Reductions for settlements     (1,501,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
   
Balance - End of year       1,501,000us-gaap_UnrecognizedTaxBenefits
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
 
Liability related to uncertain tax positions which is recorded as a current liability       1,501,000us-gaap_LiabilityForUncertainTaxPositionsCurrent
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
 
Accrued interest, related to unrecognized tax benefits       166,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
 
Accrued interest related to unrecognized tax benefits       336,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
 
IRS | Adjustment          
Reconciliation of the beginning and ending amount of unrecognized tax benefits          
Over-accrued interest reversed     (133,000)mcri_UnrecognizedTaxBenefitsInterestOnIncomeTaxesOverAccruedReversal
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioAdjustmentMember
   
Tax Settlements | IRS          
Unrecognized tax benefits          
Amount paid related to examination         1,100,000us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
/ us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis
= us-gaap_SettlementWithTaxingAuthorityMember
Reconciliation of the beginning and ending amount of unrecognized tax benefits          
Over-accrued interest reversed     $ (87,000)mcri_UnrecognizedTaxBenefitsInterestOnIncomeTaxesOverAccruedReversal
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
/ us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis
= us-gaap_SettlementWithTaxingAuthorityMember