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Debt of the Operating Partnership (Schedule of Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($) |  |  | 1 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2018 | Dec. 31, 2017 | Feb. 28, 2018 | Jan. 31, 2018 | Sep. 30, 2018 | Jul. 31, 2017 | Dec. 31, 2011
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal |  | $ 1,780,562,000 |  |  | $ 1,764,591,000 |  |
Book value of debt |  | 1,763,651,000 |  |  | $ 1,747,660,000 |  |
Senior Notes [Member] | 3.875% 2023 Senior Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  | 3.875% |  |
Principal |  | 250,000,000 |  |  | $ 250,000,000 |  |
Book value of debt |  | 246,036,000 |  |  | $ 246,505,000 |  |
Senior Notes [Member] | 3.75% 2024 Senior Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  | 3.75% |  |
Principal |  | 250,000,000 |  |  | $ 250,000,000 |  |
Book value of debt |  | 247,410,000 |  |  | $ 247,677,000 |  |
Senior Notes [Member] | 3.125% 2026 Senior Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  | 3.125% |  |
Principal |  | 350,000,000 |  |  | $ 350,000,000 |  |
Book value of debt |  | 345,128,000 |  |  | $ 345,533,000 |  |
Senior Notes [Member] | 3.875% 2027 Senior Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  | 3.875% | 3.875% |
Principal |  | 300,000,000 |  |  | $ 300,000,000 | $ 300,000,000 |
Book value of debt |  | 296,182,000 |  |  | 296,469,000 |  |
Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal |  | 37,462,000 |  |  | 35,091,000 |  |
Book value of debt |  | 39,879,000 |  |  | 37,211,000 |  |
Effective interest rates |  |  |  |  |  |  | 5.05%
Mortgages Payable [Member] | Southaven [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal | $ 60,000,000 | 60,000,000 | $ 51,400,000 | $ 60,000,000 | 51,400,000 |  |
Book value of debt |  | 59,881,000 |  |  | 51,148,000 |  |
Unsecured Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal |  | 325,000,000 |  |  | 325,000,000 |  |
Book value of debt |  | 322,975,000 |  |  | 323,416,000 |  |
Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal |  | 208,100,000 |  |  | 203,100,000 |  |
Book value of debt |  | $ 206,160,000 |  |  | $ 199,701,000 |  |
London Interbank Offered Rate (LIBOR) [Member] | Mortgages Payable [Member] | Southaven [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate | 1.75% |  | 1.80% |  | 1.80% |  |
London Interbank Offered Rate (LIBOR) [Member] | Unsecured Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 0.95% |  |
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.90% |  | 0.875% | 0.875% |  |
Minimum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  | 5.14% |  |
Maximum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  | 7.65% |  |

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