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Debt Guaranteed by the Company (Tables) | 9 Months Ended
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Sep. 30, 2018
Tanger Factory Outlet Centers, Inc. [Member] |
Debt Instrument [Line Items] |
Schedule of Debt | The Operating Partnership had the following principal amounts outstanding on the debt guaranteed by the Company (in thousands):
|  | As of
|  | September 30, 2018 |  | December 31, 2017
Unsecured lines of credit |  | $ | 203,100 |  |  | $ | 208,100 |
Unsecured term loan |  | $ | 325,000 |  |  | $ | 325,000 |

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