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Shareholders' Equity of the Company (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Feb. 28, 2021 | Dec. 31, 2020 | Feb. 28, 2019
Class of Stock [Line Items] |  |  |  |  |  |  |
At Market Stock Aggregate Gross Sales Price of Common Shares |  |  | $ 250.0 |  |  |  |
Tanger Factory Outlet Centers, Inc. [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Common dividends paid per common share (in dollars per share) | $ 0.1775 | $ 0.355 |  |  |  |  |
Common dividends per common share (in dollars per share) |  | 0.3575 | $ 0.1775 | $ 0.7125 |  |  |
Common shares, par value (in dollars per share) |  |  | $ 0.01 |  | $ 0.01 | $ 0.01 |
Additional amount authorized |  |  |  |  |  |  | $ 44.3
Authorized repurchase amount |  |  |  |  |  |  | $ 169.3
Remaining amount authorized to be repurchase |  |  | $ 80.0 |  |  |  |
Tanger Properties Limited Partnership [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Common distributions (in dollars per share) | $ 0.1775 | 0.355 | $ 0.1775 | $ 0.7125 |  |  |
Cash dividend declared (in dollars per unit) |  | $ 0.3575 |  |  |  |  |

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