Tanger Inc. Quarterly report pursuant to Section 13 or 15(d)

Debt of the Operating Partnership (Narrative) (Details)

Debt of the Operating Partnership (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2011
Tanger Properties Limited Partnership [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Collateral for mortgages payable	$ 690,100,000	$ 602,700,000
Tanger Properties Limited Partnership [Member] \| Mortgages [Member] \| Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Effective interest rates			5.05%
Tanger Properties Limited Partnership [Member] \| Mortgages [Member] \| The Outlets at Hershey [Member]
Debt Instrument [Line Items]
Effective interest rates			3.40%
Tanger Properties Limited Partnership [Member] \| Mortgages [Member] \| Ocean City Factory Outlets [Member]
Debt Instrument [Line Items]
Effective interest rates			4.68%
Tanger Properties Limited Partnership [Member] \| Notes Payable [Member]
Debt Instrument [Line Items]
Effective interest rates			3.15%
Tanger Properties Limited Partnership [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit, Maximum borrowing capacity	520,000,000
Line of Credit Facility, Liquidity Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings	20,000,000
Line of Credit Facility, Syndicated Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings	500,000,000
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized	$ 750,000,000
Line of Credit, Dividend Restrictions, Percentage of Funds From Operations Allowed on a Cumulative Basis	95.00%
Minimum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty	5.00%
Maximum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty	100.00%