Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data of the Company (Unaudited) (Details)

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Quarterly Financial Data of the Company (Unaudited) (Details) - USD ($)
3 Months Ended 12 Months Ended 24 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Diluted earnings per common share:                        
Gain on sale of assets                 $ 43,422,000      
Impairment charges                     $ 0  
Tanger Factory Outlet Centers, Inc. [Member]                        
Entity Information [Line Items]                        
Total revenues $ 120,492,000 $ 118,994,000 $ 115,707,000 $ 123,155,000 $ 127,199,000 $ 124,236,000 $ 119,711,000 $ 123,535,000 478,348,000 $ 494,681,000 488,234,000  
Net income (loss) (12,379,000) 24,809,000 14,457,000 65,841,000 20,619,000 (23,031,000) 24,290,000 23,685,000 92,728,000 45,563,000 71,876,000  
Net income attributable to Tanger Factory Outlet Centers, Inc. (11,749,000) 23,546,000 13,727,000 62,331,000 19,707,000 (21,859,000) 22,969,000 22,838,000 87,855,000 43,655,000 68,002,000  
Income (loss) available to common shareholders of Tanger Factory Outlet Centers, Inc. $ (12,055,000) $ 23,241,000 $ 13,613,000 $ 61,720,000 $ 19,385,000 $ (22,172,000) $ 22,656,000 $ 22,575,000 $ 86,519,000 $ 42,444,000 $ 66,793,000  
Basic earnings per common share:                        
Net income (in dollars per share) $ (0.13) $ 0.25 $ 0.15 $ 0.66 $ 0.21 $ (0.24) $ 0.24 $ 0.24 $ 0.93 $ 0.45 $ 0.71  
Diluted earnings per common share:                        
Net income (in dollars per share) $ (0.13) $ 0.25 $ 0.15 $ 0.66 $ 0.21 $ (0.24) $ 0.24 $ 0.24 $ 0.93 $ 0.45 $ 0.71  
Gain on sale of assets                 $ 43,422,000 $ 0 $ 6,943,000  
Impairment charges                 37,610,000 49,739,000 0  
Unconsolidated Properties [Member]                        
Entity Information [Line Items]                        
Total revenues                 93,508,000 94,509,000 96,776,000  
Net income (loss)                 16,244,000 2,217,000 3,421,000  
Diluted earnings per common share:                        
Impairment charges                 0 14,359,000 18,042,000  
Unconsolidated Properties [Member] | Bromont and Les Factories St. Sauveur [Member]                        
Diluted earnings per common share:                        
Impairment charges                   14,359,000 18,042,000  
Company's share of impairment charge         $ 7,200,000         $ 7,180,000 $ 9,021,000  
Jeffersonville [Member]                        
Diluted earnings per common share:                        
Impairment charges $ 37,600,000         $ 49,700,000           $ 85,400,000
Nags Head, Ocean City, Park City & Williamsburg [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                        
Diluted earnings per common share:                        
Gain on sale of assets       $ 43,400,000         $ 43,422,000