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Debt of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2016 | Oct. 31, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Apr. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jul. 31, 2017 | Oct. 31, 2016 | Dec. 31, 2011
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 1,780,562,000 |  |  |  |  |  | $ 1,730,779,000 | $ 1,780,562,000 |  |  |  |
Book value of debt |  |  | 1,763,651,000 |  |  |  |  |  | 1,712,918,000 | 1,763,651,000 |  |  |  |
Debt Issuance Costs, Net |  |  | 12,700,000 |  |  |  |  |  | 14,100,000 | 12,700,000 |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  |  |  |  | $ 3,058,000 | 3,263,000 | $ 3,237,000 |  |  |
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 | 250,000,000 |  |  |  |
Book value of debt |  |  | 246,036,000 |  |  |  |  |  | $ 246,664,000 | 246,036,000 |  |  |  |
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 | 250,000,000 |  |  |  |
Book value of debt |  |  | 247,410,000 |  |  |  |  |  | $ 247,765,000 | 247,410,000 |  |  |  |
Senior Notes [Member] | 3.125% 2026 Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  |  |  |  |  | 3.125% |  |  |  | 3.125% |
Principal |  |  | 350,000,000 |  |  |  |  |  | $ 350,000,000 | 350,000,000 |  |  |  |
Book value of debt |  |  | 345,128,000 |  |  |  |  |  | $ 345,669,000 | 345,128,000 |  |  |  |
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 |  | $ 300,000,000 |  |
Book value of debt |  |  | 296,182,000 |  |  |  |  |  | 296,565,000 | 296,182,000 |  |  |  |
Mortgages [Member] | Atlantic City Outlets The Walk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal |  |  | 37,462,000 |  |  |  |  |  | 34,279,000 | 37,462,000 |  |  |  |
Book value of debt |  |  | 39,879,000 |  |  |  |  |  | 36,298,000 | 39,879,000 |  |  |  |
Effective interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.05%
Mortgages [Member] | Southaven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal |  | $ 60,000,000 | 60,000,000 |  |  | $ 51,400,000 | $ 60,000,000 |  | 51,400,000 | 60,000,000 |  |  |  |
Book value of debt |  |  | 59,881,000 |  |  |  |  |  | 51,173,000 | 59,881,000 |  |  |  |
Unsecured Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal | $ 325,000,000 |  | 325,000,000 | $ 250,000,000 | $ 350,000,000 |  |  | $ 325,000,000 | 350,000,000 | 325,000,000 |  |  |  |
Book value of debt |  |  | 322,975,000 |  |  |  |  |  | 346,799,000 | 322,975,000 |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal |  |  | 208,100,000 |  |  |  |  |  | 145,100,000 | 208,100,000 |  |  |  |
Book value of debt |  |  | $ 206,160,000 |  |  |  |  |  | $ 141,985,000 | $ 206,160,000 |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Mortgages [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% |  |  | 1.05% | 0.90% |  |  | 0.95% | 0.90% |  |  |  |  |
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 [Member] | Atlantic City Outlets The Walk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  |  |  |  |  | 5.14% |  |  |  |  |
Maximum [Member] | Mortgages [Member] | Atlantic City Outlets The Walk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate(s) |  |  |  |  |  |  |  |  | 7.65% |  |  |  |  |

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