| Sep 30,
2016 | Sep 30,
2017 | Sep 30,
2018 | Sep 30,
2019 | Sep 30,
2020 | Sep 30,
2021 | Sep 30,
2022 | Sep 30,
2023 | Sep 30,
2024 |
|---|
| Management services | - | - | 192 | 178 | 169 | 171 | 195 | 186 | 188 |
|---|
| Termination and incentive fees | - | - | - | - | - | - | - | - | 1 |
|---|
| Advisory services | - | - | 4 | 3 | 3 | 4 | 5 | 5 | 5 |
|---|
| Reimbursable compensation and benefits | - | - | - | 57 | 57 | 52 | 57 | 60 | - |
|---|
| Reimbursable equity based compensation | - | - | - | - | - | 9 | 7 | 10 | - |
|---|
| Other reimbursable expenses | - | - | - | 355 | 361 | 370 | 569 | 656 | - |
|---|
| Revenues | 267 | 272 | 405 | 713 | 590 | 607 | 833 | 962 | 898 |
|---|
| Investment Income, Interest | - | - | - | - | - | - | - | - | 1 |
|---|
| Loan investment interest expense | - | - | - | - | - | - | - | - | 0 |
|---|
| Income from loan investments, net | - | - | - | - | - | - | - | - | 1 |
|---|
| Lease Income | - | - | - | - | - | - | - | - | 2 |
|---|
| Reimbursable compensation and benefits | - | - | - | - | - | - | - | - | 84 |
|---|
| Reimbursable equity based compensation | - | - | - | - | - | - | - | - | 8 |
|---|
| Other reimbursable expenses | - | - | - | - | - | - | - | - | 609 |
|---|
| Total reimbursable costs | - | - | - | - | - | - | - | - | 701 |
|---|
| Compensation and benefits | - | - | 109 | 115 | 121 | 120 | 130 | 136 | 170 |
|---|
| Equity based compensation | 8 | 6 | 11 | 9 | 8 | 12 | 10 | 12 | 11 |
|---|
| Severance Costs | 1 | - | 3 | 7 | 2 | 5 | 1 | 2 | 6 |
|---|
| Total compensation and benefits expense | - | - | 123 | 131 | 131 | 136 | 141 | 151 | 187 |
|---|
| General and administrative | 25 | 25 | 27 | 29 | 27 | 27 | 33 | 36 | 44 |
|---|
| Reimbursed Expense | - | - | - | 355 | 361 | 370 | 569 | 656 | 609 |
|---|
| Rental Property Expense | - | - | - | - | - | - | - | - | 0 |
|---|
| Transaction and acquisition related costs | - | 9 | 2 | 1 | 2 | 1 | 0 | 4 | 8 |
|---|
| Depreciation and amortization | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 5 |
|---|
| Total expenses | 120 | 136 | 153 | 516 | 521 | 535 | 744 | 849 | 853 |
|---|
| Operating income | 147 | 136 | 252 | 198 | 69 | 72 | 88 | 114 | 45 |
|---|
| Change in fair value of Earnout liability | - | -1 | -0 | - | - | - | - | - | -3 |
|---|
| Interest income | 0 | 2 | 5 | 9 | 4 | 1 | 1 | 11 | 10 |
|---|
| Interest expense | - | - | - | - | - | - | - | - | 1 |
|---|
| Gain on equity method investments | - | -0 | -1 | 1 | 2 | 0 | - | - | 7 |
|---|
| Income before income tax expense | - | - | - | - | - | 94 | 91 | 150 | 64 |
|---|
| Income tax expense | 25 | 28 | 59 | 27 | 12 | 13 | 13 | 22 | 11 |
|---|
| Net income | 122 | 109 | 217 | 169 | 66 | 81 | 77 | 128 | 53 |
|---|
| Net income attributable to noncontrolling interest in The RMR Group LLC | - | - | - | - | - | - | - | - | 30 |
|---|
| Net loss attributable to noncontrolling interest in consolidated entity | - | - | - | - | - | - | - | - | -0 |
|---|
| Net income attributable to The RMR Group Inc. | 122 | 109 | 217 | 169 | 66 | 81 | 77 | 128 | 53 |
|---|
| Earnings Per Share, Basic | - | - | 5.94 | 4.59 | 1.77 | 2.18 | 2.06 | 3.44 | 1.38 |
|---|
| Earnings Per Share, Diluted | - | - | 5.92 | 4.59 | 1.75 | 2.15 | 2.04 | 3.44 | 1.38 |
|---|