Debt of the Operating Partnership (Schedule of Debt) (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Apr. 30, 2025	Sep. 30, 2025	Dec. 31, 2024	Dec. 31, 2011
Debt Instrument [Line Items]
Book Value		$ 1,613,012	$ 1,423,759
Tanger Properties Limited Partnership
Debt Instrument [Line Items]
Principal		1,617,790	1,433,906
Book Value		1,613,012	1,423,759
Unamortized debt issuance costs		$ 4,800	10,100
Tanger Properties Limited Partnership | Senior notes | 3.125% 2026 Senior Notes
Debt Instrument [Line Items]
Fixed interest rate (percent)		3.125%
Effective rate (percent)		3.20%
Principal		$ 350,000	350,000
Book Value		$ 349,484	349,045
Tanger Properties Limited Partnership | Senior notes | 3.875% 2027 Senior Notes
Debt Instrument [Line Items]
Fixed interest rate (percent)		3.875%
Effective rate (percent)		3.90%
Principal		$ 300,000	300,000
Book Value		$ 299,266	298,956
Tanger Properties Limited Partnership | Senior notes | 2.750% 2031 Senior Notes
Debt Instrument [Line Items]
Fixed interest rate (percent)		2.75%
Effective rate (percent)		2.90%
Principal		$ 400,000	400,000
Book Value		394,381	393,710
Tanger Properties Limited Partnership | Mortgages payable | Atlantic City
Debt Instrument [Line Items]
Principal		6,090	7,206
Book Value		$ 6,165	7,341
Effective interest rate				5.10%
Tanger Properties Limited Partnership | Mortgages payable | Southaven
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	2.00%	2.00%
Effective rate (percent)		5.60%
Principal	$ 51,700	$ 61,700	51,700
Book Value		$ 61,125	51,525
Portion of mortgage under guarantee (percent)		10.00%
Tanger Properties Limited Partnership | Mortgages payable | Kansas City Outlets
Debt Instrument [Line Items]
Fixed interest rate (percent)		7.57%
Effective rate (percent)		6.00%
Principal		$ 115,000	0
Book Value		$ 118,760	0
Effective interest rate		6.00%
Tanger Properties Limited Partnership | Unsecured term loan | Unsecured term loan
Debt Instrument [Line Items]
Basis spread on variable rate (percent)		0.94%
Effective rate (percent)		4.90%
Principal		$ 325,000	325,000
Book Value		323,831	323,182
Tanger Properties Limited Partnership | Unsecured lines of credit
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 6,100	7,400
Tanger Properties Limited Partnership | Unsecured lines of credit | Unsecured lines of credit
Debt Instrument [Line Items]
Basis spread on variable rate (percent)		0.85%
Principal		$ 60,000	0
Book Value		$ 60,000	$ 0
Tanger Properties Limited Partnership | Minimum | Mortgages payable | Atlantic City
Debt Instrument [Line Items]
Fixed interest rate (percent)		6.44%
Tanger Properties Limited Partnership | Minimum | Mortgages payable | Kansas City Outlets
Debt Instrument [Line Items]
Fixed interest rate (percent)		7.57%