MOHEGAN VENTURES-NORTHWEST, LLC (COWLITZ PROJECT) (Cowlitz Project)	12 Months Ended
Sep. 30, 2014
Cowlitz Project
Schedule of Long-term Development Projects [Line Items]
MOHEGAN VENTURES-NORTHWEST, LLC (COWLITZ PROJECT)	MOHEGAN VENTURES-NORTHWEST, LLC (COWLITZ PROJECT): In July 2004, the Authority formed Mohegan Ventures-NW as its wholly-owned subsidiary. Mohegan Ventures-NW is one of three current members in Salishan-Mohegan, which was formed to participate in the Cowlitz Project, a proposed casino to be owned by the Cowlitz Tribe and to be located in Clark County, Washington. Mohegan Ventures-NW, Salishan Company, LLC, an unrelated entity, and a subsidiary of the Tribe hold membership interests in Salishan-Mohegan of 49.15%, 40% and 10.85%, respectively. Salishan-Mohegan holds a 100% membership interest in Salishan-Mohegan Two and Interchange Development Group, both of which were formed to acquire certain property related to the Cowlitz Project. Salishan-Mohegan is not a restricted entity of the Authority, and therefore, is not a guarantor of the Authority’s debt obligations. In September 2004, Salishan-Mohegan entered into development and management agreements with the Cowlitz Tribe in connection with the Cowlitz Project, which agreements have been amended from time to time. Under the terms of the development agreement, Salishan-Mohegan will assist in securing financing, as well as administer and oversee the planning, designing, development, construction and furnishing of the proposed casino. The development agreement provides for development fees of 3% of total project costs, as defined under the development agreement. Under the terms of Salishan-Mohegan's operating agreement, development fees will be distributed to Mohegan Ventures-NW. In 2006, Salishan-Mohegan purchased a 152-acre site for the proposed casino, which will be transferred to the Cowlitz Tribe or the United States pursuant to the development agreement. Development of the Cowlitz Project is subject to certain governmental and regulatory approvals and agreements, including, but not limited to, a gaming compact with the State of Washington and acceptance of land into trust on behalf of the Cowlitz Tribe by the United States Department of the Interior. The development agreement provides for termination of Salishan-Mohegan’s exclusive development rights if the land is not taken into trust by December 31, 2020. Under the terms of the management agreement, Salishan-Mohegan will manage, operate and maintain the proposed casino for a period of seven years following its opening. The management agreement provides for management fees of 24% of net revenues, as defined under the management agreement, which approximates net income earned from the Cowlitz Project. Under the terms of Salishan-Mohegan's operating agreement, management fees will be allocated to the members of Salishan-Mohegan based on their respective membership interest. The management agreement is subject to approval by the National Indian Gaming Commission (the “NIGC”). On August 7, 2014, the Cowlitz Tribe’s Class III Tribal-State gaming compact with the State of Washington became effective with notice of federal approval published in the Federal Register. According to the notice, the compact allows for two gaming facilities, allocates 975 gaming machines for leasing, authorizes the operation of up to 3,000 gaming machines and 125 table games, and is in effect until terminated by written agreement of both parties. Under the terms of the development agreement, certain receivables contributed to Salishan-Mohegan and amounts advanced by Salishan-Mohegan on behalf of the Cowlitz Tribe are reimbursable to Salishan-Mohegan by the Cowlitz Tribe, subject to appropriate approvals defined under the development agreement. Reimbursements are contingent and are to be distributed upon: (1) the receipt of necessary financing for the development of the proposed casino and (2) the related property being taken into trust by the United States Department of the Interior. The Authority currently accrues interest on the Salishan-Mohegan receivables at an annual rate of 10.0%. In March 2013, two lawsuits challenging a December 2010 decision of the Assistant Secretary - Indian Affairs of the Department of the Interior to take the 152-acre Cowlitz Project site into trust were dismissed on procedural grounds. In April 2013, pursuant to judicial directive, the Department of the Interior issued a new Record of Decision to take the Cowlitz Project site into trust, determining for a second time that the site will serve as the initial reservation of the Cowlitz Tribe and that the tribe may conduct gaming on such lands under the Indian Gaming Regulatory Act. In June 2013, the plaintiffs in the earlier litigation filed two new lawsuits challenging the new Record of Decision, and, in July 2013, those lawsuits were consolidated. By Notice of Trust Acquisition filed with the court on October 22, 2014, while motions for summary judgment filed by the plaintiffs and the defendants were pending, the federal defendants provided the court notice of the United States Department of the Interior's planned trust acquisition of the Cowlitz Project site, which was the subject of the litigation, on the earlier of: (1) January 21, 2015 and (2) 30 days after a court order granting summary judgment in favor of the federal defendants. On December 12, 2014, a U.S. District Court for the District of Columbia judge entered an order granting summary judgment in favor of the federal defendants, thereby upholding the Record of Decision and denying the federal plaintiffs’ motion. On December 18, 2014, one of the federal plaintiffs, the Confederated Tribes of the Grand Ronde Community of Oregon, filed notice of an appeal of that order to the Court of Appeals for the District of Columbia Circuit. The Authority can provide no assurance as to the outcome of this appeal or any future litigation or that the remaining steps and conditions for the Cowlitz Project site to be taken into trust for gaming will be satisfied or that necessary financing for the development of the proposed casino will be obtained. In light of the aforementioned and the uncertainty in the development of the Cowlitz Project, the Authority maintains a reserve for doubtful collection of the Salishan-Mohegan receivables, which is based on the Authority’s estimate of the probability that the receivables will be collected. As of September 30, 2014 and 2013, the Salishan-Mohegan receivables, including accrued interest, totaled $56.8 million and $48.0 million, respectively. As of September 30, 2014 and 2013, related reserves for doubtful collection totaled $17.0 million and $14.4 million, respectively. The Salishan-Mohegan receivables were included in other assets, net, in the accompanying consolidated balance sheets.

MOHEGAN VENTURES-NORTHWEST, LLC (COWLITZ PROJECT):

In July 2004, the Authority formed Mohegan Ventures-NW as its wholly-owned subsidiary. Mohegan Ventures-NW is one of three current members in Salishan-Mohegan, which was formed to participate in the Cowlitz Project, a proposed casino to be owned by the Cowlitz Tribe and to be located in Clark County, Washington. Mohegan Ventures-NW, Salishan Company, LLC, an unrelated entity, and a subsidiary of the Tribe hold membership interests in Salishan-Mohegan of 49.15%, 40% and 10.85%, respectively. Salishan-Mohegan holds a 100% membership interest in Salishan-Mohegan Two and Interchange Development Group, both of which were formed to acquire certain property related to the Cowlitz Project. Salishan-Mohegan is not a restricted entity of the Authority, and therefore, is not a guarantor of the Authority’s debt obligations.

In September 2004, Salishan-Mohegan entered into development and management agreements with the Cowlitz Tribe in connection with the Cowlitz Project, which agreements have been amended from time to time. Under the terms of the development agreement, Salishan-Mohegan will assist in securing financing, as well as administer and oversee the planning, designing, development, construction and furnishing of the proposed casino. The development agreement provides for development fees of 3% of total project costs, as defined under the development agreement. Under the terms of Salishan-Mohegan's operating agreement, development fees will be distributed to Mohegan Ventures-NW. In 2006, Salishan-Mohegan purchased a 152-acre site for the proposed casino, which will be transferred to the Cowlitz Tribe or the United States pursuant to the development agreement. Development of the Cowlitz Project is subject to certain governmental and regulatory approvals and agreements, including, but not limited to, a gaming compact with the State of Washington and acceptance of land into trust on behalf of the Cowlitz Tribe by the United States Department of the Interior. The development agreement provides for termination of Salishan-Mohegan’s exclusive development rights if the land is not taken into trust by December 31, 2020. Under the terms of the management agreement, Salishan-Mohegan will manage, operate and maintain the proposed casino for a period of seven years following its opening. The management agreement provides for management fees of 24% of net revenues, as defined under the management agreement, which approximates net income earned from the Cowlitz Project. Under the terms of Salishan-Mohegan's operating agreement, management fees will be allocated to the members of Salishan-Mohegan based on their respective membership interest. The management agreement is subject to approval by the National Indian Gaming Commission (the “NIGC”). On August 7, 2014, the Cowlitz Tribe’s Class III Tribal-State gaming compact with the State of Washington became effective with notice of federal approval published in the Federal Register. According to the notice, the compact allows for two gaming facilities, allocates 975 gaming machines for leasing, authorizes the operation of up to 3,000 gaming machines and 125 table games, and is in effect until terminated by written agreement of both parties.

Under the terms of the development agreement, certain receivables contributed to Salishan-Mohegan and amounts advanced by Salishan-Mohegan on behalf of the Cowlitz Tribe are reimbursable to Salishan-Mohegan by the Cowlitz Tribe, subject to appropriate approvals defined under the development agreement. Reimbursements are contingent and are to be distributed upon: (1) the receipt of necessary financing for the development of the proposed casino and (2) the related property being taken into trust by the United States Department of the Interior. The Authority currently accrues interest on the Salishan-Mohegan receivables at an annual rate of 10.0%.

In March 2013, two lawsuits challenging a December 2010 decision of the Assistant Secretary - Indian Affairs of the Department of the Interior to take the 152-acre Cowlitz Project site into trust were dismissed on procedural grounds. In April 2013, pursuant to judicial directive, the Department of the Interior issued a new Record of Decision to take the Cowlitz Project site into trust, determining for a second time that the site will serve as the initial reservation of the Cowlitz Tribe and that the tribe may conduct gaming on such lands under the Indian Gaming Regulatory Act. In June 2013, the plaintiffs in the earlier litigation filed two new lawsuits challenging the new Record of Decision, and, in July 2013, those lawsuits were consolidated. By Notice of Trust Acquisition filed with the court on October 22, 2014, while motions for summary judgment filed by the plaintiffs and the defendants were pending, the federal defendants provided the court notice of the United States Department of the Interior's planned trust acquisition of the Cowlitz Project site, which was the subject of the litigation, on the earlier of: (1) January 21, 2015 and (2) 30 days after a court order granting summary judgment in favor of the federal defendants. On December 12, 2014, a U.S. District Court for the District of Columbia judge entered an order granting summary judgment in favor of the federal defendants, thereby upholding the Record of Decision and denying the federal plaintiffs’ motion. On December 18, 2014, one of the federal plaintiffs, the Confederated Tribes of the Grand Ronde Community of Oregon, filed notice of an appeal of that order to the Court of Appeals for the District of Columbia Circuit. The Authority can provide no assurance as to the outcome of this appeal or any future litigation or that the remaining steps and conditions for the Cowlitz Project site to be taken into trust for gaming will be satisfied or that necessary financing for the development of the proposed casino will be obtained.

In light of the aforementioned and the uncertainty in the development of the Cowlitz Project, the Authority maintains a reserve for doubtful collection of the Salishan-Mohegan receivables, which is based on the Authority’s estimate of the probability that the receivables will be collected. As of September 30, 2014 and 2013, the Salishan-Mohegan receivables, including accrued interest, totaled $56.8 million and $48.0 million, respectively. As of September 30, 2014 and 2013, related reserves for doubtful collection totaled $17.0 million and $14.4 million, respectively. The Salishan-Mohegan receivables were included in other assets, net, in the accompanying consolidated balance sheets.