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Acquisition of Rental Property - Narrative (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2016 | Nov. 30, 2017 | Aug. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | May 31, 2016
Foxwoods [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Additional Interest in Subsidiaries |  | $ 0 |  |  |  |  |  |
Economic interest percentage in joint venture |  | 100.00% |  |  |  |  |  |
Savannah [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Economic interest percentage in joint venture | 98.00% |  |  |  |  |  |  |
Cash |  |  | $ 15,000,000 |  |  |  |  |
Mortgage loan |  |  | 96,900,000 |  |  |  |  |
Ownership % | 50.00% |  |  |  |  |  |  |
Contingent consideration |  |  | 0 |  |  |  |  |
Acquisition costs |  |  | 260,000 |  |  |  |  |
Gain on previously held interest in acquired joint ventures |  |  | 46,300,000 |  |  |  |  |
Rental property and related intangible increase |  |  | 46,300,000 |  |  |  |  |
Prepaids and other assets |  |  | 250,000 |  |  |  |  |
Accounts payable and accrued expense |  |  | $ 2,100,000 |  |  |  |  |
Westgate [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Cash |  |  |  | $ 39,000,000 |  |  |  |
Mortgage loan |  |  |  | 62,000,000 |  |  |  |
Ownership % |  |  |  |  |  |  |  | 58.00%
Contingent consideration |  |  |  | 0 |  |  |  |
Acquisition costs |  |  |  | 127,000 |  |  |  |
Gain on previously held interest in acquired joint ventures |  |  |  | 49,300,000 |  |  |  |
Rental property and related intangible increase |  |  |  | 49,300,000 |  |  |  |
Prepaids and other assets |  |  |  | 227,000 |  |  |  |
Accounts payable and accrued expense |  |  |  | 5,000,000 |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ 40,900,000 |  |  |  |
Percentage of business acquired |  |  |  | 40.00% |  |  |  |
Mortgages [Member] | Savannah [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 1.65% |  |  |  |  |
Noncontrolling interests [Member] | Westgate [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Additional Interest in Subsidiaries |  |  |  | $ 1,900,000 |  |  |  |
Percentage of business acquired |  |  |  | 2.00% |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Westgate [Member] | Mortgages [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.75% |  |  |  |
Tanger Properties Limited Partnership [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Cash |  |  |  |  | $ 0 | $ 0 | $ 45,219,000 |
Acquisition costs |  |  |  |  | 0 | 0 | 487,000 |
Gain on previously held interest in acquired joint ventures |  |  |  |  | 0 | 0 | $ 95,516,000 |
Principal |  |  |  |  | $ 1,730,779,000 | $ 1,780,562,000 |  |
Tanger Properties Limited Partnership [Member] | 3.125% Senior Notes $250 million [Member] | Senior Notes [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Principal |  |  | $ 250,000,000 |  |  |  |  |
Rental growth rate [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Recognized Identifiable Assets Acquired and Liabilities Assumed, Measurement Input |  |  |  |  |  |  | 3.00% |
Discount rate [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Recognized Identifiable Assets Acquired and Liabilities Assumed, Measurement Input |  |  |  |  |  |  | 7.50% |
Discount rate [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Recognized Identifiable Assets Acquired and Liabilities Assumed, Measurement Input |  |  |  |  |  |  | 8.25% |
Terminal capitalization rate [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Recognized Identifiable Assets Acquired and Liabilities Assumed, Measurement Input |  |  |  |  |  |  | 5.75% |
Terminal capitalization rate [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Acquistion of Rental Property [Line Items] |  |  |  |  |  |  |  |
Recognized Identifiable Assets Acquired and Liabilities Assumed, Measurement Input |  |  |  |  |  |  | 7.00% |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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