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Fair Value of Assets (Details) $ in Thousands | Sep. 30, 2017 USD ($) shares
--- | ---
RMR Inc | Class A common shares |
Recurring Fair Value Measurements |
Investment in common shares (in shares) | shares | 2,637,408
Five Star |
Recurring Fair Value Measurements |
Investment in common shares (in shares) | shares | 4,235,000
Five Star | Common Shares |
Recurring Fair Value Measurements |
Investment in common shares (in shares) | shares | 4,235,000
Recurring |
Recurring Fair Value Measurements |
Investments in available for sale securities | $ 141,995
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |
Recurring Fair Value Measurements |
Investments in available for sale securities | 141,995
Recurring | Significant Other Observable Inputs (Level 2) |
Recurring Fair Value Measurements |
Investments in available for sale securities | 0
Recurring | Significant Unobservable Inputs (Level 3) |
Recurring Fair Value Measurements |
Investments in available for sale securities | $ 0

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