SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL STATEMENT INFORMATION - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands		3 Months Ended					9 Months Ended				12 Months Ended
		Jun. 30, 2015		Mar. 31, 2015	Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014		Sep. 30, 2014		Sep. 30, 2010
Cash flows provided by (used in) operating activities:
Net income (loss)		$ 27,695			$ 13,762		$ 56,654		$ (44,157)
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation and amortization		19,086			20,070		58,703		60,067
Relinquishment liability reassessment		0			0		(243)		0
Accretion of discount to the relinquishment liability		0			552		227		1,654
Cash paid for accretion of discount to the relinquishment liability							(778)		(2,071)
Loss on early extinguishment of debt							0		58,481
Payments of tender offer costs and discounts							0		(48,155)
Amortization of debt issuance costs and accretion of bond discounts							5,757		6,164
Provision for losses on receivables							3,399		2,953
Impairment of Project Horizon		0		$ 2,500	0		2,502		0		$ 5,000		$ 58,100
(Gain) loss on disposition of assets							845		(12)
Loss from unconsolidated affiliates							1,302		794
Inter-company transactions							0		0
Changes in operating assets and liabilities:
Increase in receivables							(282)		(5,389)
Increase in inventories							(972)		(1,713)
Increase in other assets							(6,317)		(4,660)
Increase (decrease) in trade payables							(9,803)		7,671
Increase in accrued interest							20,059		7,709
Increase in other liabilities							13,430		8,987
Net cash flows provided by operating activities							144,483		48,323
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including change in construction payables							(12,081)		(28,901)
Issuance of third-party loans and advances							(2,201)		(1,392)
Payments received on third-party loans							117		606
(Increase) decrease in restricted cash, net							(782)		14,150
Proceeds from asset sales							1,577		105
Investments in the New England Black Wolves							(500)		0
Investments in unconsolidated affiliates							0		(29)
Inter-company transactions							0		0
Net cash flows used in investing activities							(13,870)		(15,461)
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe							(875)		(2,750)
Repayments of other long-term debt							(9,900)		(191,088)
Principal portion of relinquishment liability payments							(24,400)		(29,129)
Distributions to Mohegan Tribe							(32,500)		(32,500)
Payments of financing fees							0		(12,631)
Payments on capital lease obligations							(726)		(1,709)
Inter-company transactions							0		0
Net cash flows used in financing activities							(109,561)		(24,828)
Net increase in cash and cash equivalents							21,052		8,034
Cash and cash equivalents at beginning of period							49,108		63,624		63,624
Cash and cash equivalents at end of period		70,160			71,658		70,160		71,658		49,108
Credit Facility | Bank Credit Facility - Term
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments							0		(393,000)
Credit Facility | Prior Term Loan Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments							0		(222,103)
Credit Facility | Senior Secured Credit Facility - Revolving, due June 2018
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							299,000		193,000
Credit facility/line of credit repayments							(328,000)		(173,000)
Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0		124,343
Credit facility/line of credit repayments							(5,469)		(1,563)
Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0		720,952
Credit facility/line of credit repayments							(3,650)		(3,650)
Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							332,124		258,415
Credit facility/line of credit repayments							(335,165)		(258,415)
Authority
Cash flows provided by (used in) operating activities:
Net income (loss)		28,134			13,892		57,932		(43,736)
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation and amortization		15,496			16,397		47,739		49,091
Relinquishment liability reassessment							(243)
Accretion of discount to the relinquishment liability					552		227		1,654
Cash paid for accretion of discount to the relinquishment liability							(778)		(2,071)
Loss on early extinguishment of debt									58,481
Payments of tender offer costs and discounts									(48,155)
Amortization of debt issuance costs and accretion of bond discounts							5,518		5,925
Provision for losses on receivables							447		877
Impairment of Project Horizon							2,502
(Gain) loss on disposition of assets							843		(15)
Loss from unconsolidated affiliates							38		(154)
Inter-company transactions							(18,858)		(6,466)
Changes in operating assets and liabilities:
Increase in receivables							1,856		(3,409)
Increase in inventories							(808)		(1,342)
Increase in other assets							(876)		992
Increase (decrease) in trade payables							(6,448)		6,288
Increase in accrued interest							19,622		9,114
Increase in other liabilities							13,501		1,231
Net cash flows provided by operating activities							122,214		28,305
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including change in construction payables							(8,799)		(14,680)
Issuance of third-party loans and advances							0		0
Payments received on third-party loans							117		606
(Increase) decrease in restricted cash, net							(27)		44
Proceeds from asset sales							1,577		105
Investments in the New England Black Wolves							0
Investments in unconsolidated affiliates									0
Inter-company transactions							8,558		19,812
Net cash flows used in investing activities							1,426		5,887
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe							0		0
Repayments of other long-term debt							(9,844)		(191,049)
Principal portion of relinquishment liability payments							(24,400)		(29,129)
Distributions to Mohegan Tribe							(32,500)		(32,500)
Payments of financing fees									(12,631)
Payments on capital lease obligations							(726)		(1,709)
Inter-company transactions							0		0
Net cash flows used in financing activities							(108,630)		(22,039)
Net increase in cash and cash equivalents							15,010		12,153
Cash and cash equivalents at beginning of period							33,939		44,060		44,060
Cash and cash equivalents at end of period		48,949			56,213		48,949		56,213		33,939
Authority | Credit Facility | Bank Credit Facility - Term
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments									(393,000)
Authority | Credit Facility | Prior Term Loan Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments									(222,103)
Authority | Credit Facility | Senior Secured Credit Facility - Revolving, due June 2018
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							299,000		193,000
Credit facility/line of credit repayments							(328,000)		(173,000)
Authority | Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings									124,343
Credit facility/line of credit repayments							(5,469)		(1,563)
Authority | Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings									720,952
Credit facility/line of credit repayments							(3,650)		(3,650)
Authority | Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							332,124		258,415
Credit facility/line of credit repayments							(335,165)		(258,415)
Total Guarantor Subsidiaries
Cash flows provided by (used in) operating activities:
Net income (loss)		1,631	[1]		(3,517)	[2]	(4,321)	[3],[4]	(22,024)	[5],[6]
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation and amortization		3,306	[1]		3,420	[2]	10,113	[3],[4]	10,318	[5],[6]
Relinquishment liability reassessment	[4]						0
Accretion of discount to the relinquishment liability					0	[2]	0	[3],[4]	0	[5],[6]
Cash paid for accretion of discount to the relinquishment liability							0	[3]	0	[5]
Loss on early extinguishment of debt	[5]								0
Payments of tender offer costs and discounts	[5]								0
Amortization of debt issuance costs and accretion of bond discounts							0	[3]	0	[5]
Provision for losses on receivables							270	[3]	183	[5]
Impairment of Project Horizon	[4]						0
(Gain) loss on disposition of assets							2	[3]	3	[5]
Loss from unconsolidated affiliates							0	[3]	0	[5]
Inter-company transactions							31,889	[3]	46,421	[5]
Changes in operating assets and liabilities:
Increase in receivables							(1,980)	[3]	(1,849)	[5]
Increase in inventories							(164)	[3]	(371)	[5]
Increase in other assets							(237)	[3]	(229)	[5]
Increase (decrease) in trade payables							(3,394)	[3]	1,382	[5]
Increase in accrued interest							0	[3]	0	[5]
Increase in other liabilities							5,399	[3]	2,562	[5]
Net cash flows provided by operating activities							37,577	[3]	36,396	[5]
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including change in construction payables							(2,698)	[3]	(3,382)	[5]
Issuance of third-party loans and advances							0	[3]	0	[5]
Payments received on third-party loans							0	[3]	0	[5]
(Increase) decrease in restricted cash, net							(716)	[3]	2,063	[5]
Proceeds from asset sales							0	[3]	0	[5]
Investments in the New England Black Wolves	[3]						0
Investments in unconsolidated affiliates	[5]								0
Inter-company transactions							(14,915)	[3]	(21,079)	[5]
Net cash flows used in investing activities							(18,329)	[3]	(22,398)	[5]
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe							0	[3]	0	[5]
Repayments of other long-term debt							0	[3]	0	[5]
Principal portion of relinquishment liability payments							0	[3]	0	[5]
Distributions to Mohegan Tribe							0	[3]	0	[5]
Payments of financing fees	[5]								0
Payments on capital lease obligations							(37)	[3]	(28)	[5]
Inter-company transactions							(13,855)	[3]	(20,728)	[5]
Net cash flows used in financing activities							(13,892)	[3]	(20,756)	[5]
Net increase in cash and cash equivalents							5,356	[3]	(6,758)	[5]
Cash and cash equivalents at beginning of period							14,767	[3],[7]	18,655	[5]	18,655	[5]
Cash and cash equivalents at end of period		20,123	[3],[8]		11,897	[5]	20,123	[3],[8]	11,897	[5]	14,767	[3],[7]
Total Guarantor Subsidiaries | Credit Facility | Bank Credit Facility - Term
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	[5]								0
Total Guarantor Subsidiaries | Credit Facility | Prior Term Loan Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	[5]								0
Total Guarantor Subsidiaries | Credit Facility | Senior Secured Credit Facility - Revolving, due June 2018
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0	[3]	0	[5]
Credit facility/line of credit repayments							0	[3]	0	[5]
Total Guarantor Subsidiaries | Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	[5]								0
Credit facility/line of credit repayments							0	[3]	0	[5]
Total Guarantor Subsidiaries | Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	[5]								0
Credit facility/line of credit repayments							0	[3]	0	[5]
Total Guarantor Subsidiaries | Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0	[3]	0	[5]
Credit facility/line of credit repayments							0	[3]	0	[5]
Total Non-Guarantor Subsidiaries and Entities
Cash flows provided by (used in) operating activities:
Net income (loss)		(4,721)	[9]		(6,061)	[10]	(14,796)	[11],[12]	(21,781)	[13],[14]
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation and amortization		284	[9]		253	[10]	851	[11],[12]	658	[13],[14]
Relinquishment liability reassessment	[11]						0
Accretion of discount to the relinquishment liability					0	[10]	0	[11],[12]	0	[13],[14]
Cash paid for accretion of discount to the relinquishment liability							0	[11]	0	[13]
Loss on early extinguishment of debt	[13]								0
Payments of tender offer costs and discounts	[13]								0
Amortization of debt issuance costs and accretion of bond discounts							239	[11]	239	[13]
Provision for losses on receivables							2,682	[11]	1,893	[13]
Impairment of Project Horizon							0
(Gain) loss on disposition of assets							0	[11]	0	[13]
Loss from unconsolidated affiliates							1,264	[11]	948	[13]
Inter-company transactions							4,800	[11]	3,423	[13]
Changes in operating assets and liabilities:
Increase in receivables							(810)	[11]	(688)	[13]
Increase in inventories							0	[11]	0	[13]
Increase in other assets							(5,170)	[11]	(5,387)	[13]
Increase (decrease) in trade payables							39	[11]	1	[13]
Increase in accrued interest							437	[11]	(1,405)	[13]
Increase in other liabilities							(4,844)	[11]	5,749	[13]
Net cash flows provided by operating activities							(15,308)	[11]	(16,350)	[13]
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including change in construction payables							(584)	[11]	(10,839)	[13]
Issuance of third-party loans and advances							(2,201)	[11]	(1,392)	[13]
Payments received on third-party loans							0	[11]	0	[13]
(Increase) decrease in restricted cash, net							(39)	[11]	12,043	[13]
Proceeds from asset sales							0	[11]	0	[13]
Investments in the New England Black Wolves	[11]						(500)
Investments in unconsolidated affiliates	[13]								(29)
Inter-company transactions							37	[11]	0	[13]
Net cash flows used in investing activities							(3,287)	[11]	(217)	[13]
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe							(875)	[11]	(2,750)	[13]
Repayments of other long-term debt							(56)	[11]	(39)	[13]
Principal portion of relinquishment liability payments							0	[11]	0	[13]
Distributions to Mohegan Tribe							0	[11]	0	[13]
Payments of financing fees	[13]								0
Payments on capital lease obligations							0	[11]	0	[13]
Inter-company transactions							20,212	[11]	21,995	[13]
Net cash flows used in financing activities							19,281	[11]	19,206	[13]
Net increase in cash and cash equivalents							686	[11]	2,639	[13]
Cash and cash equivalents at beginning of period							402	[11],[15]	909	[13]	909	[13]
Cash and cash equivalents at end of period		1,088	[11],[16]		3,548	[13]	1,088	[11],[16]	3,548	[13]	402	[11],[15]
Total Non-Guarantor Subsidiaries and Entities | Credit Facility | Bank Credit Facility - Term
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	[13]								0
Total Non-Guarantor Subsidiaries and Entities | Credit Facility | Prior Term Loan Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	[13]								0
Total Non-Guarantor Subsidiaries and Entities | Credit Facility | Senior Secured Credit Facility - Revolving, due June 2018
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0	[11]	0	[13]
Credit facility/line of credit repayments							0	[11]	0	[13]
Total Non-Guarantor Subsidiaries and Entities | Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	[13]								0
Credit facility/line of credit repayments							0	[11]	0	[13]
Total Non-Guarantor Subsidiaries and Entities | Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	[13]								0
Credit facility/line of credit repayments							0	[11]	0	[13]
Total Non-Guarantor Subsidiaries and Entities | Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0	[11]	0	[13]
Credit facility/line of credit repayments							0	[11]	0	[13]
Consolidating/Eliminating Adjustments
Cash flows provided by (used in) operating activities:
Net income (loss)		2,651			$ 9,448		17,839		43,384
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation and amortization		0					0		0
Relinquishment liability reassessment							0
Accretion of discount to the relinquishment liability					$ 0		0		0
Cash paid for accretion of discount to the relinquishment liability							0		0
Loss on early extinguishment of debt									0
Payments of tender offer costs and discounts									0
Amortization of debt issuance costs and accretion of bond discounts							0		0
Provision for losses on receivables							0		0
Impairment of Project Horizon							0
(Gain) loss on disposition of assets							0		0
Loss from unconsolidated affiliates							0		0
Inter-company transactions							(17,831)		(43,378)
Changes in operating assets and liabilities:
Increase in receivables							652		557
Increase in inventories							0		0
Increase in other assets							(34)		(36)
Increase (decrease) in trade payables							0		0
Increase in accrued interest							0		0
Increase in other liabilities							(626)		(555)
Net cash flows provided by operating activities							0		(28)
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including change in construction payables							0		0
Issuance of third-party loans and advances							0		0
Payments received on third-party loans							0		0
(Increase) decrease in restricted cash, net							0		0
Proceeds from asset sales							0		0
Investments in the New England Black Wolves							0
Investments in unconsolidated affiliates									0
Inter-company transactions							6,320		1,267
Net cash flows used in investing activities							6,320		1,267
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe							0		0
Repayments of other long-term debt							0		0
Principal portion of relinquishment liability payments							0		0
Distributions to Mohegan Tribe							0		0
Payments of financing fees									0
Payments on capital lease obligations							37		28
Inter-company transactions							(6,357)		(1,267)
Net cash flows used in financing activities							(6,320)		(1,239)
Net increase in cash and cash equivalents							0		0
Cash and cash equivalents at beginning of period							0		0		0
Cash and cash equivalents at end of period		$ 0			$ 0		0		0		$ 0
Consolidating/Eliminating Adjustments | Credit Facility | Bank Credit Facility - Term
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments									0
Consolidating/Eliminating Adjustments | Credit Facility | Prior Term Loan Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments									0
Consolidating/Eliminating Adjustments | Credit Facility | Senior Secured Credit Facility - Revolving, due June 2018
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0		0
Credit facility/line of credit repayments							0		0
Consolidating/Eliminating Adjustments | Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings									0
Credit facility/line of credit repayments							0		0
Consolidating/Eliminating Adjustments | Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings									0
Credit facility/line of credit repayments							0		0
Consolidating/Eliminating Adjustments | Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings							0		0
Credit facility/line of credit repayments							$ 0		$ 0

[1] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[2] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[3] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[4] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[5] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[6] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[7] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[8] Includes the Pocono Subsidiaries, MBC, Mohegan Golf, Mohegan Ventures-NW, MVW, WTG and MTGA Gaming.

[9] Includes Mohegan Lacrosse, MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[10] Includes MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[11] Includes Mohegan Lacrosse, MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[12] Includes Mohegan Lacrosse, MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[13] Includes MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[14] Includes MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[15] Includes MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.

[16] Includes Mohegan Lacrosse, MGA and subsidiaries, Downs Lodging, Salishan-Mohegan, MG&H and Mohegan Resorts and subsidiaries.