Indebtedness	12 Months Ended
Sep. 30, 2016
Debt Disclosure [Abstract]
Indebtedness	Indebtedness During the fiscal year ended September 30, 2014, RMR LLC had a $2,000 unsecured demand line of credit with RBS Citizens National Association, or Citizens, that accrued interest on outstanding balances, if any, at the prime rate, which was renewed periodically and had no stated maturity. ABP Trust guaranteed the amounts outstanding under this line of credit. There were no borrowings outstanding for the fiscal year ended September 30, 2014, and this line of credit expired in July 2014. During the fiscal years ended September 30, 2015 and 2014, RMR LLC had unconditionally guaranteed revolving lines of credit to certain subsidiaries of ABP Trust made available by U.S. Bank National Association, or U.S. Bank, and Citizens for up to $57,500 and $36,650, respectively. As of September 30, 2014, there were no amounts outstanding under these credit facilities. The credit facility with Citizens expired in February 2015. Effective May 1, 2015, RMR LLC’s guarantee of the U.S. Bank credit facility agreement was released. Our financial statements for the fiscal years ended September 30, 2015 and 2014 do not reflect any amounts in connection with these guarantees. As reported in Note 6, Related Person Transactions, above, during the periods prior to June 5, 2015, amounts periodically were advanced and repaid between ABP Trust and its then 100.0% owned subsidiary RMR LLC, and our Founders periodically made loans for working capital to RMR LLC.

Indebtedness

12 Months Ended

Sep. 30, 2016

During the fiscal year ended September 30, 2014, RMR LLC had a $2,000 unsecured demand line of credit with RBS Citizens National Association, or Citizens, that accrued interest on outstanding balances, if any, at the prime rate, which was renewed periodically and had no stated maturity. ABP Trust guaranteed the amounts outstanding under this line of credit. There were no borrowings outstanding for the fiscal year ended September 30, 2014, and this line of credit expired in July 2014.

During the fiscal years ended September 30, 2015 and 2014, RMR LLC had unconditionally guaranteed revolving lines of credit to certain subsidiaries of ABP Trust made available by U.S. Bank National Association, or U.S. Bank, and Citizens for up to $57,500 and $36,650, respectively. As of September 30, 2014, there were no amounts outstanding under these credit facilities. The credit facility with Citizens expired in February 2015. Effective May 1, 2015, RMR LLC’s guarantee of the U.S. Bank credit facility agreement was released. Our financial statements for the fiscal years ended September 30, 2015 and 2014 do not reflect any amounts in connection with these guarantees.

As reported in Note 6, Related Person Transactions, above, during the periods prior to June 5, 2015, amounts periodically were advanced and repaid between ABP Trust and its then 100.0% owned subsidiary RMR LLC, and our Founders periodically made loans for working capital to RMR LLC.