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Related Person Transactions - RMR LLC Management Fees and Reimbursements (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Related person transactions |  |  |  |
Property management and construction supervision fees paid | $ 1,954 | $ 1,714 | $ 5,189 | $ 4,629
Repurchase of common shares (in shares) |  |  | 13,113 |
RMR LLC |  |  |  |
Related person transactions |  |  |  |
Business management fees | $ 8,682 | 8,077 | $ 26,644 | 22,492
Base business management fee payable in cash (as a percent) | 100.00% |  | 100.00% |
RMR LLC |  |  |  |
Related person transactions |  |  |  |
Property management and construction supervision fees | $ 2,533 | 2,211 | $ 7,554 | $ 5,928
Share grants (in shares) |  |  | 84,000 | 81,700
Accrual for RMR LLC employee share grants and internal audit costs | $ 302 | $ 662 | $ 1,337 | $ 1,615
Common Shares | RMR LLC |  |  |  |
Related person transactions |  |  |  |
Common shares issued as payment for base business management fee |  |  | 68,983,000 | 98,449,000

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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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