Long-term Debt, Quarterly Interest Payment

No definition available.

Name:	mtga_LongTermDebtQuarterlyInterestPayment
Namespace Prefix:	mtga_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to interest.

+ References

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

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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

-Glossary Current Liabilities

-URI http://asc.fasb.org/extlink&oid=6509677

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e7018-107765

+ Details

Name:	us-gaap_InterestPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mtga_PromissoryNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT - Promissory Notes (Details) (USD $)	1 Months Ended
LONG-TERM DEBT - Promissory Notes (Details) (USD $)	Sep. 30, 2009	Mar. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2013
Debt Instrument [Line Items]
Accrued interest			$ 8,659,000us-gaap_InterestPayableCurrent	$ 23,296,000us-gaap_InterestPayableCurrent
Promissory Notes \| 2009 Mohegan Tribe Promissory Note
Debt Instrument [Line Items]
Loan face amount	10,000,000.0
Note stated interest rate	10.00%
Accrued interest			2,500,000	4,700,000
Promissory Notes \| 2009 Mohegan Tribe Promissory Note \| Commencing December 31, 2013 through March 31, 2014
Debt Instrument [Line Items]
Quarterly interest payment	1,200,000.0
Promissory Notes \| 2009 Mohegan Tribe Promissory Note \| Commencing June 30, 2015
Debt Instrument [Line Items]
Quarterly interest payment	1,300,000.0
Quarterly amortization of principal	875,000
Promissory Notes \| 2009 Mohegan Tribe Promissory Note \| Commencing December 31, 2012 through September 30, 2013
Debt Instrument [Line Items]
Quarterly amortization of principal	1,625,000.000
Promissory Notes \| 2009 Mohegan Tribe Promissory Note \| Commencing December 31, 2013
Debt Instrument [Line Items]
Quarterly amortization of principal	875,000
Promissory Notes \| 2009 Mohegan Tribe Promissory Note \| Commencing September 30, 2015
Debt Instrument [Line Items]
Quarterly amortization of principal	875,000
Promissory Notes \| 2012 Mohegan Tribe Minor's Trust Promissory Note
Debt Instrument [Line Items]
Loan face amount		20,000,000.0
Note stated interest rate		10.00%
Accrued interest			416,000	5,000
Promissory Notes \| 2012 Mohegan Tribe Minor's Trust Promissory Note \| Commencing September 30, 2015 through March 31, 2016
Debt Instrument [Line Items]
Periodic interest payment		800,000
Promissory Notes \| 2012 Mohegan Tribe Minor's Trust Promissory Note \| Commencing December 31, 2012 through March 31, 2014
Debt Instrument [Line Items]
Quarterly amortization of principal		500,000
Promissory Notes \| 2012 Mohegan Tribe Minor's Trust Promissory Note \| Commencing July 1, 2014 and September 30, 2015
Debt Instrument [Line Items]
Quarterly amortization of principal		500,000
Promissory Notes \| 2012 Mohegan Tribe Minor's Trust Promissory Note \| Commencing December 31, 2015 through September 30, 2016
Debt Instrument [Line Items]
Quarterly amortization of principal		1,500,000.0
Promissory Notes \| 2012 Mohegan Tribe Minor's Trust Promissory Note \| Commencing at Maturity
Debt Instrument [Line Items]
Quarterly amortization of principal		10,000,000.0
Promissory Notes \| 2013 Mohegan Tribe Promissory Note
Debt Instrument [Line Items]
Loan face amount					7,400,000
Note stated interest rate					4.00%
Accrued interest			$ 1,000	$ 1,000