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Leases and Management Agreements with Five Star (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) lease_agreement community | Mar. 31, 2017 USD ($) community | Dec. 31, 2017 USD ($) community
Senior Living Communities |  |  |
Number of communities leased by the Company | community |  |  | 8
Five Star |  |  |
Number of communities leased by the Company | community | 185 | 185 |
Number of leases with related party | lease_agreement | 5 |  |
Total rental income recognized | $ 51,759 | $ 50,985 |
Related party transaction, annual rents due | 1,374 | 1,445 |
Rents receivable | 17,265 |  | $ 18,539
Real estate improvements purchased |  | 8,082 |
Increase or decrease in annual lease rent payable |  | 648 |
Property management agreement expense | $ 3,494 | $ 3,299 |
Five Star | Rents from significant lessee | Revenues |  |  |
% of Total (as a percent) | 18.80% |  |
Five Star | Rents from significant lessee | Investment |  |  |
% of Total (as a percent) | 27.00% |  |
Five Star | Senior Living Communities |  |  |
Number of communities managed by related party | community | 72 | 68 |
Rehabilitation Services | Five Star |  |  |
Expenses from transactions with related party | $ 1,699 | $ 1,982 |

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