Number of shares purchased during the period under a dividend reinvestment plan (DRIP).

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- Definition

Value of stock purchased during the period from a dividend reinvestment plan (DRIP).

+ References

No definition available.

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- Definition

Equity Method Investment, Number of Shares Owned

+ References

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- Definition

Shares received during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

No definition available.

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- Definition

Value of shares received from the investment during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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No definition available.

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- Definition

The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

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- Definition

Dividends received on equity and other investments during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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- 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.

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Related Party Transactions - Investments in Managed REITS, EQC and RIF (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Related Party Transaction [Line Items]
Payments to acquire shares		$ 0	$ 46,386	$ 0
Dividends received from investment in REITs		$ 0	1,237	380
Value of dividend reinvestment program			$ 22	$ 41
HPT
Related Party Transaction [Line Items]
Shares from related party (in shares)			84,810	86,969
Value of shares received from related party			$ 2,605	$ 2,474
SIR
Related Party Transaction [Line Items]
Shares from related party (in shares)			39,927	23,136
Value of shares received from related party			$ 982	$ 668
RIF
Related Party Transaction [Line Items]
Dividend reinvestment program (in shares)			1,068	2,223
Interest and other income \| RMR LLC
Related Party Transaction [Line Items]
Dividends received from investment in REITs			$ 1,237	$ 380
Common shares \| HPT \| Shares Received as Incentive Business Management Fees
Related Party Transaction [Line Items]
Shares from related party (in shares)				105,536
Value of shares received from related party				$ 2,772
Common shares \| SIR \| Shares Received as Incentive Business Management Fees
Related Party Transaction [Line Items]
Shares from related party (in shares)				32,865
Value of shares received from related party				$ 891
SIR \| Common shares
Related Party Transaction [Line Items]
Number of shares owned (in shares)		500,000
Payments to acquire shares	$ 16,018