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Noncontrolling Interests (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2017 USD ($) shares | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) shares | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) property item shares | Jun. 27, 2013 shares | Jan. 22, 2013 shares
Noncontrolling interests |  |  |  |  |  |  |
Conversion ratio |  |  | 1 |  |  |  |
Number of properties acquired | property |  |  |  |  | 2 |  |
Number of joint ventures controlling interest acquired | item |  |  |  |  | 2 |  |
Change in the carrying value of all noncontrolling interests |  |  |  |  |  |  |
Carrying value at beginning of the period |  |  | $ 20,249 |  |  |  |
Reallocation of equity |  |  | 485 |  |  |  |
Distributions |  |  | (1,656) |  |  |  |
Allocation of net income | $ 133 | $ 130 | 420 | $ 623 |  |  |
Carrying value at end of the period | $ 19,498 |  | $ 19,498 |  | $ 20,249 |  |
Joint Venture One |  |  |  |  |  |  |
Noncontrolling interests |  |  |  |  |  |  |
Ownership interest (as a percent) | 95.00% |  | 95.00% |  |  |  |
Joint Venture Two |  |  |  |  |  |  |
Noncontrolling interests |  |  |  |  |  |  |
Ownership interest (as a percent) | 74.00% |  | 74.00% |  |  |  |
Tau Operating Partnership |  |  |  |  |  |  |
Noncontrolling interests |  |  |  |  |  |  |
Realty Income partnership units, ownership interest (as a percent) | 99.40% |  | 99.40% |  |  |  |
Change in the carrying value of all noncontrolling interests |  |  |  |  |  |  |
Carrying value at beginning of the period |  |  | $ 13,405 |  |  |  |
Reallocation of equity |  |  | 492 |  |  |  |
Distributions |  |  | (602) |  |  |  |
Allocation of net income |  |  | 189 |  |  |  |
Carrying value at end of the period | $ 13,484 |  | $ 13,484 |  | $ 13,405 |  |
Units held by third party | shares | 317,022 |  | 317,022 |  | 317,022 |  | 317,022
Realty Income, L.P. |  |  |  |  |  |  |
Noncontrolling interests |  |  |  |  |  |  |
Third party partnership units, ownership interest (as a percent) | 0.40% |  | 0.40% |  |  |  |
Realty Income partnership units, ownership interest (as a percent) | 99.60% |  | 99.60% |  |  |  |
Change in the carrying value of all noncontrolling interests |  |  |  |  |  |  |
Carrying value at beginning of the period |  |  | $ 2,216 |  |  |  |
Reallocation of equity |  |  | (26) |  |  |  |
Distributions |  |  | (167) |  |  |  |
Allocation of net income |  |  | 151 |  |  |  |
Carrying value at end of the period | $ 2,174 |  | $ 2,174 |  | $ 2,216 |  |
Units held by third party | shares | 88,182 |  | 88,182 |  | 88,182 | 534,546 |
Other Noncontrolling Interests |  |  |  |  |  |  |
Change in the carrying value of all noncontrolling interests |  |  |  |  |  |  |
Carrying value at beginning of the period |  |  | $ 4,628 |  |  |  |
Reallocation of equity |  |  | 19 |  |  |  |
Distributions |  |  | (887) |  |  |  |
Allocation of net income |  |  | 80 |  |  |  |
Carrying value at end of the period | $ 3,840 |  | $ 3,840 |  | $ 4,628 |  |

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