Investments in Unconsolidated Real Estate Joint Ventures (Summary Statements of Operations for Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Unconsolidated Properties [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	$ 22,071	$ 16,959	$ 65,664	$ 55,470
Expenses:
Property operating	8,735	8,035	25,597	24,023
General and administrative	87	82	173	344
Impairment charge	0	0	0	6,181
Depreciation and amortization	5,749	5,877	17,413	17,686
Total expenses	14,571	13,994	43,183	48,234
Interest expense	(2,913)	(3,024)	(8,769)	(9,991)
Gain on sale of assets	0	0	503	0
Other income (expense)	2	104	157	165
Total other income (expense)	(2,911)	(2,920)	(8,109)	(9,826)
Net income (loss)	4,589	45	14,372	(2,590)
Tanger Factory Outlet Centers, Inc. [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	112,465	103,213	314,432	278,836
Expenses:
Property operating	37,186	35,206	103,747	101,991
General and administrative	14,817	11,181	47,310	35,331
Impairment charge	0	0	0	45,675
Depreciation and amortization	26,944	29,903	82,826	87,966
Total expenses	78,947	76,290	233,883	270,963
Interest expense	(13,282)	(15,647)	(40,982)	(47,786)
Gain on sale of assets	0	2,324	0	2,324
Other income (expense)	253	161	(2,598)	789
Total other income (expense)	(46,850)	(13,162)	(91,440)	(44,673)
Net income (loss)	(11,071)	13,719	(4,133)	(38,290)
The Company and Operating Partnership's share of:
Net income (loss)	2,261	(42)	6,758	(1,490)
Depreciation and amortization (real estate related)	$ 2,908	$ 3,003	$ 8,817	$ 9,038