XML 25 R31.htm IDEA: XBRL DOCUMENT v2.4.1.9
LONG-TERM DEBT - Senior Subordinated Notes (Details) (USD $)
Mar. 31, 2015
Sep. 30, 2014
Mar. 31, 2012
Feb. 28, 2005
Aug. 31, 2013
Debt Instrument [Line Items]          
Accrued interest payable $ 9,876,000us-gaap_InterestPayableCurrent $ 8,659,000us-gaap_InterestPayableCurrent      
2005 6 7/8% Senior Subordinated Notes | Senior Subordinated Notes          
Debt Instrument [Line Items]          
Loan face amount       150,000,000.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
 
Note stated interest rate 6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
  6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
 
Principal amount tendered and exchanged     140,300,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Debt outstanding 9,700,000mtga_LongTermDebtIncludingDueToRelatedPartiesExcludingDeferredIncomeGainOnSaleOfDerivativesNet
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
       
Accrued interest payable   83,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
2012 11 % Senior Subordinated Notes | Senior Subordinated Notes          
Debt Instrument [Line Items]          
Loan face amount     344,200,000.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Note stated interest rate 11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Redeemable rate before cutoff     100.00%mtga_DebtInstrumentRedeemableRateBeforeCutoff
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Redeemable rate after cutoff     101.00%mtga_DebtInstrumentRedeemableRateUponChangeOfControl
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Redeemable rate upon certain conditions     100.00%mtga_DebtInstrumentRedeemableRateUponCertainConditions
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Payment in Kind (PIK) interest rate     2.00%mtga_DebtInstrumentPaymentInKindInterestRate
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Debt instrument, repurchase amount         69,000,000us-gaap_DebtInstrumentRepurchaseAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
Notes payable 275,200,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
       
Accrued interest payable 1,300,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
1,300,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
2012 11 % Senior Subordinated Notes | Senior Subordinated Notes | 2004 Senior Subordinated Notes          
Debt Instrument [Line Items]          
Principal amount tendered and exchanged     203,800,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ mtga_DebtInstrumentRepurchasedAxis
= mtga_A2004SeniorSubordinatedNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
2012 11 % Senior Subordinated Notes | Senior Subordinated Notes | 2005 Senior Subordinated Notes          
Debt Instrument [Line Items]          
Principal amount tendered and exchanged     $ 140,300,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ mtga_DebtInstrumentRepurchasedAxis
= mtga_A2005SeniorSubordinatedNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember