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Summary of Significant Accounting Policies (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) segment | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Operating Segments |  |  |  |  |
Number of Reportable Operating Segments | segment |  |  | 4 |  |
Revenue Recognition [Abstract] |  |  |  |  |
Percentage rents |  |  | $ 2,500 | $ 1,000 |
Prepaymentfee |  |  |  | 3,600 |
Concentrations of Risk [Abstract] |  |  |  |  |
Rental revenue | $ 119,469 | $ 96,055 | 226,506 | 189,833 |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation |  |  | $ 6,961 | 5,504 |
Share based compensation, future vesting period minimum (in years) |  |  | 4 years |  |
Range of settlement date for shares for non-employee trustee from grant date, minimum (in years) |  |  | 1 year |  |
Share based compensation expense related to employees and trustees |  |  | $ 600 |  |
Deferred Costs | $ 34,100 |  | $ 34,100 |  | $ 29,300
American Multi-Cinema, Inc. [Member] |  |  |  |  |
Concentrations of Risk [Abstract] |  |  |  |  |
Percent of megaplex theatre rental leased by AMC |  |  | 35.00% |  |
Rental revenue |  |  | $ 57,600 | $ 43,600 |
Percentage of lease revenue in total revenue |  |  | 20.80% | 18.40% |
Carmike Cinemas, Inc [Member] |  |  |  |  |
Concentrations of Risk [Abstract] |  |  |  |  |
Rental revenue |  |  |  | $ 9,900 |
Percentage of lease revenue in total revenue |  |  |  | 4.20% |
Minimum [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation, future vesting period minimum (in years) |  |  | 3 years |  |
Maximum [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation, future vesting period minimum (in years) |  |  | 4 years |  |
Building [Member] | Minimum [Member] |  |  |  |  |
Rental Properties [Abstract] |  |  |  |  |
Estimated useful live of buildings (in years) |  |  | 30 years |  |
Building [Member] | Maximum [Member] |  |  |  |  |
Rental Properties [Abstract] |  |  |  |  |
Estimated useful live of buildings (in years) |  |  | 40 years |  |
Furniture, fixtures & equipment [Member] | Minimum [Member] |  |  |  |  |
Rental Properties [Abstract] |  |  |  |  |
Estimated useful live of buildings (in years) |  |  | 3 years |  |
Furniture, fixtures & equipment [Member] | Maximum [Member] |  |  |  |  |
Rental Properties [Abstract] |  |  |  |  |
Estimated useful live of buildings (in years) |  |  | 25 years |  |
Share Options [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation, future vesting period minimum (in years) |  |  | 4 years |  |
Stock-option expense |  |  | $ 361 | $ 460 |
Restricted Stock [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation expense related to employees and trustees |  |  | $ 6,000 | 4,500 |
Restricted Stock [Member] | Minimum [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation, future vesting period minimum (in years) |  |  | 3 years |  |
Restricted Stock [Member] | Maximum [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation, future vesting period minimum (in years) |  |  | 4 years |  |
Restricted Share Units [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Range of settlement date for shares for non-employee trustee from grant date, minimum (in years) |  |  | 1 year |  |
Restricted Share Units [Member] | Non-Employee Trustees [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share based compensation expense related to employees and trustees |  |  | $ 599 | $ 533 |

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