2.4.0.84070 - Disclosure - LONG-TERM DEBT (Details)truefalsefalse1false USDfalsefalse$I2013Q2http://www.sec.gov/CIK0000834162instant2013-06-30T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$I2012http://www.sec.gov/CIK0000834162instant2012-12-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$I2013Q2_SeniorSecuredSecondLienNotes11.5PercentMember_LTDhttp://www.sec.gov/CIK0000834162instant2013-06-30T00:00:000001-01-01T00:00:00falsefalse11.5% Senior Secured Second Lien Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimntg_SeniorSecuredSecondLienNotes11.5PercentMemberus-gaap_LongtermDebtTypeAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDtruefalse$I2012_SeniorSecuredSecondLienNotes11.5PercentMember_LThttp://www.sec.gov/CIK0000834162instant2012-12-31T00:00:000001-01-01T00:00:00falsefalse11.5% Senior Secured Second Lien Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimntg_SeniorSecuredSecondLienNotes11.5PercentMemberus-gaap_LongtermDebtTypeAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDtruefalse$I2011Q3_M0802_SeniorSecuredSecondLienNotes11.5PercentMemberhttp://www.sec.gov/CIK0000834162instant2011-08-02T00:00:000001-01-01T00:00:00falsefalse11.5% Senior Secured Second Lien Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimntg_SeniorSecuredSecondLienNotes11.5PercentMemberus-gaap_LongtermDebtTypeAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6false truefalseD2013Q2YTD_DebtInstrumentVariableRateCashInterestMember_SeniorSecuredSecondLienNotes11.5PercentMemberhttp://www.sec.gov/CIK0000834162duration2013-01-01T00:00:002013-06-30T00:00:00falsefalse11.5% Senior Secured Second Lien Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimntg_SeniorSecuredSecondLienNotes11.5PercentMemberus-gaap_LongtermDebtTypeAxisexplicitMemberfalsefalseInterest rate, cash basismntg_DebtInstrumentVariableRateBaseAxisxbrldihttp://xbrl.org/2006/xbrldimntg_DebtInstrumentVariableRateCashInterestMembermntg_DebtInstrumentVariableRateBaseAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli07false truefalseD2013Q2YTD_DebtInstrumentVariableRatePIKInterestMember_SeniorSecuredSecondLienNotes11.5PercentMemberhttp://www.sec.gov/CIK0000834162duration2013-01-01T00:00:002013-06-30T00:00:00falsefalse11.5% Senior Secured Second Lien Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimntg_SeniorSecuredSecondLienNotes11.5PercentMemberus-gaap_LongtermDebtTypeAxisexplicitMemberfalsefalsePIK Interestmntg_DebtInstrumentVariableRateBaseAxisxbrldihttp://xbrl.org/2006/xbrldimntg_DebtInstrumentVariableRatePIKInterestMembermntg_DebtInstrumentVariableRateBaseAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli08false USDtruefalse$D2012Q3_M08_PaymentInKindPIKNoteMemberhttp://www.sec.gov/CIK0000834162duration2012-08-01T00:00:002012-08-31T00:00:00falsefalsePIK Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PaymentInKindPIKNoteMemberus-gaap_LongtermDebtTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9false USDtruefalse$D2012Q1_M02_PaymentInKindPIKNoteMemberhttp://www.sec.gov/CIK0000834162duration2012-02-01T00:00:002012-02-29T00:00:00falsefalsePIK Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PaymentInKindPIKNoteMemberus-gaap_LongtermDebtTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10false USDtruefalse$I2013Q2_PaymentInKindPIKNoteMemberhttp://www.sec.gov/CIK0000834162instant2013-06-30T00:00:000001-01-01T00:00:00falsefalsePIK Notesus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PaymentInKindPIKNoteMemberus-gaap_LongtermDebtTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$11false USDtruefalse$I2013Q2_RevolvingCreditFacilityMemberhttp://www.sec.gov/CIK0000834162instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCredit Facilityus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_LongtermDebtTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$12false USDtruefalse$I2012_RevolvingCreditFacilityMemberhttp://www.sec.gov/CIK0000834162instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseCredit Facilityus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_LongtermDebtTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$13false USDtruefalse$I2011Q3_M0801_RevolvingCreditFacilityMemberhttp://www.sec.gov/CIK0000834162instant2011-08-01T00:00:000001-01-01T00:00:00falsefalseCredit Facilityus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_LongtermDebtTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_DebtInstrumentLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false 4us-gaap_LongTermDebtNoncurrentus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse557775000557775000USD$falsetruefalse2truefalsefalse556716000556716000USD$falsetruefalse3truefalsefalse557775000557775000USD$falsetruefalse4truefalsefalse556716000556716000USD$falsetruefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 false23false 4us-gaap_DebtInstrumentUnamortizedDiscountus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse1288900012889000falsefalsefalse4truefalsefalse1394800013948000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false24false 4us-gaap_DebtInstrumentInterestRateStatedPercentageus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.1150.115falsefalsefalse4truetruefalse0.1150.115falsefalsefalse5truetruefalse0.1150.115falsefalsefalse6falsetruefalse00falsefalsefalse7falsetruefalse00falsefalsefalse8falsetruefalse00falsefalsefalse9falsetruefalse00falsefalsefalse10falsetruefalse00falsefalsefalse11falsetruefalse00falsefalsefalse12falsetruefalse00falsefalsefalse13falsetruefalse00falsefalsefalsenum:percentItemTypepureInterest rate stated in the contractual debt agreement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false05false 4us-gaap_DebtInstrumentFaceAmountus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse565000000565000000falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false26false 4mntg_LongTermDebtIssuePriceAsPercentageOfPrincipalAmountmntg_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5truetruefalse0.970.97falsefalsefalse6falsetruefalse00falsefalsefalse7falsetruefalse00falsefalsefalse8falsetruefalse00falsefalsefalse9falsetruefalse00falsefalsefalse10falsetruefalse00falsefalsefalse11falsetruefalse00falsefalsefalse12falsetruefalse00falsefalsefalse13falsetruefalse00falsefalsefalsenum:percentItemTypepureThe issue price of the debt instrument expressed as a percentage of principal amount.No definition available.false07false 4mntg_DebtInstrumentVariableRateInterestPaymentPercentagemntg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5falsetruefalse00falsefalsefalse6truetruefalse0.10500.1050falsefalsefalse7truetruefalse0.01000.0100falsefalsefalse8falsetruefalse00falsefalsefalse9falsetruefalse00falsefalsefalse10falsetruefalse00falsefalsefalse11falsetruefalse00falsefalsefalse12falsetruefalse00falsefalsefalse13falsetruefalse00falsefalsefalsenum:percentItemTypepureRepresents the percentage amount of interest that the company elects to pay in cash and/or in-kind.No definition available.false08false 4us-gaap_DebtInstrumentIncreaseAdditionalBorrowingsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8truefalsefalse56000005600000falsefalsefalse9truefalsefalse56000005600000falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryIncrease of additional borrowings on existing and new debt instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 false29false 4us-gaap_DebtInstrumentCarryingAmountus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10truefalsefalse570700000570700000falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryIncluding current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false210false 4us-gaap_LineOfCreditFacilityMaximumBorrowingCapacityus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13truefalsefalse2000000020000000falsefalsefalsexbrli:monetaryItemTypemonetaryMaximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false211false 4us-gaap_LineOfCreditFacilityAmountOutstandingus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11truefalsefalse00USD$falsetruefalse12truefalsefalse00USD$falsetruefalse13falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount borrowed under the credit facility as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false2falseLONG-TERM DEBT (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.mtrgaming.com/role/DisclosureLongTermDebtDetails1311