XML 60 R44.htm IDEA: XBRL DOCUMENT
v3.20.2

Related Person Transactions - Footnotes to Revenue from Related Parties (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
DHC |  |
Related Party Transaction [Line Items] |  |
Aggregate incentive business management fees | $ 40,642 | $ 55,740
SIR |  |
Related Party Transaction [Line Items] |  |
Aggregate incentive business management fees | 25,817 | 25,569
SVC |  |
Related Party Transaction [Line Items] |  |
Aggregate incentive business management fees | $ 53,635 | $ 74,572

X
- Definition Represents the aggregate incentive business management fees. + References No definition available. + Details
Name: | rmr_AggregateIncentiveBusinessManagementFees
Namespace Prefix: | rmr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rmr_DiversifiedHealthcareTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rmr_SelectIncomeREITMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rmr_ServicePropertiesTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |