Annual report pursuant to Section 13 and 15(d)

Partners' Equity of the Operating Partnership (Details)

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Partners' Equity of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
General and Limited Partners' Capital Account, Units [Roll Forward]      
General partner (in units) 1,000,000    
Units withheld for employee income taxes (in units) (131,873) (89,437) (69,886)
Grant of restricted common shares awards by the Company, net of forfeitures (in units) 242,167 355,184 411,968
Issuance of deferred units (in units)     0
Repurchase of units (in units) (1,209,328) (919,249) (1,911,585)
Units issued upon exercise of options (in units) 0 0 1,800
General partner (in units) 1,000,000 1,000,000  
General partner [Member]      
General and Limited Partners' Capital Account, Units [Roll Forward]      
General partner (in units) 1,000,000 1,000,000 1,000,000
Units withheld for employee income taxes (in units) 0 0 0
Exchange of Class A limited partnership units (in units) 0 0 0
Grant of restricted common shares awards by the Company, net of forfeitures (in units) 0 0 0
Repurchase of units (in units) 0 0 0
Units issued upon exercise of options (in units)     0
General partner (in units) 1,000,000 1,000,000 1,000,000
Class A Limited Partnership Units [Member]      
General and Limited Partners' Capital Account, Units [Roll Forward]      
Limited partners (in units) 4,960,684 4,995,433 5,027,781
Units withheld for employee income taxes (in units) 0 0 0
Exchange of Class A limited partnership units (in units) (49,511) (34,749) (32,348)
Grant of restricted common shares awards by the Company, net of forfeitures (in units) 0 0 0
Repurchase of units (in units) 0 0 0
Units issued upon exercise of options (in units)     0
Limited partners (in units) 4,911,173 4,960,684 4,995,433
Class B Limited Partnership Units [Member]      
General and Limited Partners' Capital Account, Units [Roll Forward]      
Limited partners (in units) 92,941,783 93,560,536 95,095,891
Units withheld for employee income taxes (in units) (131,873) (89,437) (69,886)
Exchange of Class A limited partnership units (in units) 49,511 34,749 32,348
Grant of restricted common shares awards by the Company, net of forfeitures (in units) 242,167 355,184 411,968
Repurchase of units (in units) (1,209,328) (919,249) (1,911,585)
Units issued upon exercise of options (in units)     1,800
Limited partners (in units) 91,892,260 92,941,783 93,560,536
Limited partners [Member]      
General and Limited Partners' Capital Account, Units [Roll Forward]      
Limited partners (in units) 97,902,467 98,555,969 100,123,672
Units withheld for employee income taxes (in units) (131,873) (89,437) (69,886)
Exchange of Class A limited partnership units (in units) 0 0 0
Grant of restricted common shares awards by the Company, net of forfeitures (in units) 242,167 355,184 411,968
Repurchase of units (in units) (1,209,328) (919,249) (1,911,585)
Units issued upon exercise of options (in units)     1,800
Limited partners (in units) 96,803,433 97,902,467 98,555,969