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Investments in Unconsolidated Real Estate Joint Ventures - Summary Statements of Operations for Unconsolidated Joint Ventures (Details) - USD ($) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Expenses: |  |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  |  |  |  |  |  |  |  | $ 0 | $ 0
Unconsolidated Properties [Member] |  |  |  |  |  |  |  |  |  |  |
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 94,509,000 | 96,776,000 | 106,766,000
Expenses: |  |  |  |  |  |  |  |  |  |  |
Property operating |  |  |  |  |  |  |  |  | 37,121,000 | 36,507,000 | 39,576,000
General and administrative |  |  |  |  |  |  |  |  | 266,000 | 350,000 | 349,000
Impairment charges |  |  |  |  |  |  |  |  | 14,359,000 | 18,042,000 | 5,838,000
Depreciation and amortization |  |  |  |  |  |  |  |  | 26,262,000 | 28,162,000 | 32,930,000
Total expenses |  |  |  |  |  |  |  |  | 78,008,000 | 83,061,000 | 78,693,000
Interest expense |  |  |  |  |  |  |  |  | (14,518,000) | (10,365,000) | (8,946,000)
Other non-operating income |  |  |  |  |  |  |  |  | 234,000 | 71,000 | 6,000
Total other income (expense) |  |  |  |  |  |  |  |  | (14,284,000) | (10,294,000) | (8,940,000)
Net income |  |  |  |  |  |  |  |  | 2,217,000 | 3,421,000 | 19,133,000
Tanger Factory Outlet Centers, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 127,199,000 | $ 124,236,000 | $ 119,711,000 | $ 123,535,000 | $ 126,487,000 | $ 120,765,000 | $ 119,614,000 | $ 121,368,000 | 494,681,000 | 488,234,000 | 465,834,000
Expenses: |  |  |  |  |  |  |  |  |  |  |
Property operating |  |  |  |  |  |  |  |  | 160,457,000 | 155,235,000 | 152,017,000
General and administrative |  |  |  |  |  |  |  |  | 44,167,000 | 44,004,000 | 46,696,000
Impairment charges |  |  |  |  |  |  |  |  | 49,739,000 | 0 | 0
Depreciation and amortization |  |  |  |  |  |  |  |  | 131,722,000 | 127,744,000 | 115,357,000
Total expenses |  |  |  |  |  |  |  |  | 386,085,000 | 327,511,000 | 314,557,000
Interest expense |  |  |  |  |  |  |  |  | (64,821,000) | (64,825,000) | (60,669,000)
Other non-operating income |  |  |  |  |  |  |  |  | 864,000 | 2,724,000 | 1,028,000
Total other income (expense) |  |  |  |  |  |  |  |  | (63,957,000) | (90,784,000) | 42,180,000
Net income | $ 20,619,000 | $ (23,031,000) | $ 24,290,000 | $ 23,685,000 | $ 33,449,000 | $ (16,034,000) | $ 30,947,000 | $ 23,514,000 | 45,563,000 | 71,876,000 | 204,329,000
The Company and Operating Partnership's share of: |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 924,000 | 1,937,000 | 10,872,000
Depreciation, amortization and asset impairments (real estate related) |  |  |  |  |  |  |  |  | $ 20,494,000 | $ 22,878,000 | $ 21,829,000

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