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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Deferred lease costs amount related to salaries and related costs |  |  |  |  |  |  |  |  |  | $ 6,007 | $ 6,098 | $ 6,210 |
Tanger Factory Outlet Centers, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Cash | $ 0 |  |  |  | $ 0 |  |  |  |  | 0 | 0 | 0 | $ 121,300
Revenues | 127,199 | $ 124,236 | $ 119,711 | $ 123,535 | $ 126,487 | $ 120,765 | $ 119,614 | $ 121,368 |  | 494,681 | 488,234 | 465,834 |
General and administrative |  |  |  |  |  |  |  |  |  | 44,167 | $ 44,004 | $ 46,696 |
Minimum [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated operating lease liability | 89,000 |  |  |  |  |  |  |  |  | 89,000 |  |  |
Estimated right-of-use asset | 89,000 |  |  |  |  |  |  |  |  | 89,000 |  |  |
Maximum [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated operating lease liability | 96,000 |  |  |  |  |  |  |  |  | 96,000 |  |  |
Estimated right-of-use asset | $ 96,000 |  |  |  |  |  |  |  |  | $ 96,000 |  |  |
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 5,000 |  |  |  |
Scenario, Forecast [Member] | Minimum [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General and administrative |  |  |  |  |  |  |  |  | 4,000 |  |  |  |
Scenario, Forecast [Member] | Maximum [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General and administrative |  |  |  |  |  |  |  |  | $ 5,000 |  |  |  |

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