Quarterly report pursuant to Section 13 or 15(d)

Acquisition of Rental Property (Narrative) (Details)

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Acquisition of Rental Property (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 12, 2016
Jun. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Aug. 31, 2016
Aug. 11, 2016
Jun. 29, 2016
Business Acquisition [Line Items]                    
Rental growth rate         3.00%          
Savannah [Member]                    
Business Acquisition [Line Items]                    
Cash transfered for equity interests $ 15,000,000                  
Ownership Percentage                 50.00%  
Economic interest percentage in joint venture 98.00%                  
Contingent Consideration $ 0                  
Acquisition costs     $ 260,000              
Gain on previously held interests in acquired joint ventures 46,300,000                  
Rental property and related intangible increase 46,300,000                  
Prepaids and other assets 250,000                  
Accounts payable and accrued expenses 2,100,000                  
Westgate [Member]                    
Business Acquisition [Line Items]                    
Cash transfered for equity interests   $ 39,000,000                
Mortgage loan   62,000,000                
Ownership Percentage                   58.00%
Contingent Consideration   0                
Acquisition costs         $ 127,000          
Gain on previously held interests in acquired joint ventures   49,300,000                
Rental property and related intangible increase   49,300,000                
Total cash price   40,900,000                
Prepaids and other assets   227,000                
Accounts payable and accrued expenses   5,000,000                
Cash paid for remaining interest held by a noncontrolling interest   $ 1,900,000                
Percentage of business acquired   40.00%                
Business Combination Provisional Information Initial Accounting Incomplete Adjustment Buildings, Improvements and Fixtures     (5,600,000)              
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment     (150,000)              
Noncontrolling interests in Operating Partnership [Member] | Westgate [Member]                    
Business Acquisition [Line Items]                    
Percentage of business acquired   2.00%                
Tanger Properties Limited Partnership [Member]                    
Business Acquisition [Line Items]                    
Cash transfered for equity interests         45,219,000 $ 0        
Principal     1,741,536,000   1,741,536,000   $ 1,567,186,000      
Acquisition costs     487,000 $ 0 487,000 0        
Gain on previously held interests in acquired joint ventures     46,258,000 $ 0 95,516,000 0        
Cash paid for remaining interest held by a noncontrolling interest         1,942,000 $ 0        
3.125% Senior Notes [Member] | Tanger Properties Limited Partnership [Member] | Senior Notes [Member]                    
Business Acquisition [Line Items]                    
Principal     250,000,000   $ 250,000,000   $ 0 $ 250,000,000    
Westgate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Mortgages [Member]                    
Business Acquisition [Line Items]                    
Basis spread on variable rate   1.75%                
Savannah [Member]                    
Business Acquisition [Line Items]                    
Mortgage loan $ 96,900,000                  
Ownership Percentage [1]             50.00%      
Economic interest percentage in joint venture             98.00%      
Savannah [Member] | Joint Venture [Member] | Mortgages [Member]                    
Business Acquisition [Line Items]                    
Basis spread on variable rate 1.65%                  
Below Market Lease Value [Member] | Westgate [Member]                    
Business Acquisition [Line Items]                    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles     4,800,000              
Above Market Leases [Member] | Westgate [Member]                    
Business Acquisition [Line Items]                    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles     1,600,000              
Leases, Acquired-in-Place [Member] | Westgate [Member]                    
Business Acquisition [Line Items]                    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles     $ (628,000)              
Minimum [Member]                    
Business Acquisition [Line Items]                    
Discount rate         7.50%          
Terminal cap rate         5.75%          
Maximum [Member]                    
Business Acquisition [Line Items]                    
Discount rate         8.25%          
Terminal cap rate         7.00%          
[1] Based on capital contribution and distribution provisions in the joint venture agreement, our economic interest in the venture's cash flow was greater than indicated in the Ownership column, which states our legal interest in this venture. As of December 31, 2015, based upon the liquidation proceeds we would receive from a hypothetical liquidation of our investment based on depreciated book value, our estimated economic interest in the venture was approximately 98%. Our economic interest may fluctuate based on a number of factors, including mortgage financing, partnership capital contributions and distributions, and proceeds from gains or losses of asset sales.