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).

Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: 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

Reference 4: 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

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

LONG-TERM DEBT - Promissory Notes (Details) - USD ($)	Jun. 30, 2017	Sep. 30, 2016	Nov. 30, 2015	Mar. 31, 2013	Mar. 31, 2012
Debt Instrument [Line Items]
Accrued interest payable	$ 8,703,000	$ 5,512,000
Current portion of long-term debt - Mohegan Tribe	$ 0	5,500,000
2015 Mohegan Tribe Promissory Note \| Mohegan Gaming Advisors \| Affiliates
Debt Instrument [Line Items]
Current portion of long-term debt - Mohegan Tribe			$ 22,500,000
2012 Mohegan Tribe Promissory Note \| Promissory Notes
Debt Instrument [Line Items]
Loan face amount					$ 20,000,000.0
Accrued interest payable		2,000
2013 Mohegan Tribe Promissory Note \| Promissory Notes
Debt Instrument [Line Items]
Loan face amount				$ 7,400,000.0
Accrued interest payable		$ 1,000