Tanger Properties LTD Partnership 10-Q 3 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 01, 2018
Entity Information [Line Items]
Entity Registrant Name	TANGER FACTORY OUTLET CENTERS INC
Entity Central Index Key	899,715
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Entity Common Stock, Shares Outstanding		94,382,583
Tanger Properties Limited Partnership [Member]
Entity Information [Line Items]
Entity Registrant Name	TANGER PROPERTIES LIMITED PARTNERSHIP
Entity Central Index Key	1,004,036
Entity Filer Category	Non-accelerated Filer

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Tanger Factory Outlet Centers, Inc. [Member]
Rental property:
Land	$ 279,978	$ 279,978
Buildings, improvements and fixtures	2,810,980	2,793,638
Construction in progress	615	14,854
Rental property, at cost, total	3,091,573	3,088,470
Accumulated depreciation	(929,608)	(901,967)
Total rental property, net	2,161,965	2,186,503
Cash and cash equivalents	3,427	6,101
Investments in unconsolidated joint ventures	114,304	119,436
Deferred lease costs and other intangibles, net	127,493	132,061
Prepaids and other assets	98,669	96,004
Total assets	2,505,858	2,540,105
Debt:
Senior, unsecured notes, net	1,135,230	1,134,755
Unsecured term loan, net	323,082	322,975
Mortgages payable, net	90,109	99,761
Unsecured lines of credit, net	223,634	206,160
Total debt	1,772,055	1,763,651
Accounts payable and accrued expenses	66,405	90,416
Other liabilities	73,907	73,736
Total liabilities	1,912,367	1,927,803
Commitments and contingencies
Tanger Factory Outlet Centers, Inc.:
Common shares, $.01 par value, 300,000,000 shares authorized, 94,382,583 and 94,560,536 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	944	946
Paid in capital	776,753	784,782
Accumulated distributions in excess of net income	(194,416)	(184,865)
Partners' Equity:
Accumulated other comprehensive loss	(19,623)	(19,285)
Equity attributable to Tanger Factory Outlet Centers, Inc.	563,658	581,578
Noncontrolling interests in Operating Partnership	29,833	30,724
Noncontrolling interests in other consolidated partnerships	0	0
Total equity	593,491	612,302
Total liabilities and equity	2,505,858	2,540,105
Tanger Properties Limited Partnership [Member]
Rental property:
Land	279,978	279,978
Buildings, improvements and fixtures	2,810,980	2,793,638
Construction in progress	615	14,854
Rental property, at cost, total	3,091,573	3,088,470
Accumulated depreciation	(929,608)	(901,967)
Total rental property, net	2,161,965	2,186,503
Cash and cash equivalents	3,338	6,050
Investments in unconsolidated joint ventures	114,304	119,436
Deferred lease costs and other intangibles, net	127,493	132,061
Prepaids and other assets	97,860	95,384
Total assets	2,504,960	2,539,434
Debt:
Senior, unsecured notes, net	1,135,230	1,134,755
Unsecured term loan, net	323,082	322,975
Mortgages payable, net	90,109	99,761
Unsecured lines of credit, net	223,634	206,160
Total debt	1,772,055	1,763,651
Accounts payable and accrued expenses	65,507	89,745
Other liabilities	73,907	73,736
Total liabilities	1,911,469	1,927,132
Commitments and contingencies
Partners' Equity:
General partner, 1,000,000 units outstanding at March 31, 2018 and December 31, 2017	5,743	5,844
Limited partners, 4,995,433 and 4,995,433 Class A common units, and 93,382,583 and 93,560,536 Class B common units outstanding at March 31, 2018 and December 31, 2017, respectively	608,449	626,803
Accumulated other comprehensive loss	(20,701)	(20,345)
Total partners' equity	593,491	612,302
Noncontrolling interests in other consolidated partnerships	0	0
Total equity	593,491	612,302
Total liabilities and equity	$ 2,504,960	$ 2,539,434

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Tanger Factory Outlet Centers, Inc. [Member]
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, authorized (in shares)	300,000,000	300,000,000
Common shares, issued (in shares)	94,382,583	94,560,536
Common shares, outstanding (in shares)	94,382,583	94,560,536
Tanger Properties Limited Partnership [Member]
General partner units, outstanding (in units)	1,000,000	1,000,000
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member]
Limited partners units, outstanding (in units)	4,995,433	4,995,433
Tanger Properties Limited Partnership [Member] | Class B Limited Partnership Units [Member]
Limited partners units, outstanding (in units)	93,382,583	93,560,536

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Management, leasing and other services	$ 613	$ 579
Tanger Factory Outlet Centers, Inc. [Member]
Revenues:
Base rentals	81,533	80,330
Percentage rentals	1,429	1,855
Expense reimbursements	38,280	36,598
Management, leasing and other services	613	579
Other income	1,680	2,006
Total revenues	123,535	121,368
Expenses:
Property operating	42,218	40,387
General and administrative	11,112	11,412
Abandoned pre-development costs	0	627
Depreciation and amortization	33,123	31,294
Total expenses	86,453	83,720
Operating income	37,082	37,648
Other income (expense):
Interest expense	(15,800)	(16,487)
Other non-operating income (expense)	209	35
Income before equity in earnings of unconsolidated joint ventures	21,491	21,196
Equity in earnings of unconsolidated joint ventures	2,194	2,318
Net income	23,685	23,514
Noncontrolling interests in Operating Partnership	(1,217)	(1,178)
Noncontrolling interests in other consolidated partnerships	370	0
Net income attributable to Tanger Factory Outlet Centers, Inc.	$ 22,838	$ 22,336
Basic earnings per common share/unit
Net income (in dollars per share)	$ 0.24	$ 0.23
Diluted earnings per common share/unit
Net income (in dollars per share)	0.24	0.23
Dividends declared per common share (in dollars per share)	$ 0.3425	$ 0.325
Tanger Properties Limited Partnership [Member]
Revenues:
Base rentals	$ 81,533	$ 80,330
Percentage rentals	1,429	1,855
Expense reimbursements	38,280	36,598
Management, leasing and other services	613	579
Other income	1,680	2,006
Total revenues	123,535	121,368
Expenses:
Property operating	42,218	40,387
General and administrative	11,112	11,412
Abandoned pre-development costs	0	627
Depreciation and amortization	33,123	31,294
Total expenses	86,453	83,720
Operating income	37,082	37,648
Other income (expense):
Interest expense	(15,800)	(16,487)
Other non-operating income (expense)	209	35
Income before equity in earnings of unconsolidated joint ventures	21,491	21,196
Equity in earnings of unconsolidated joint ventures	2,194	2,318
Net income	23,685	23,514
Noncontrolling interests in consolidated partnerships	370	0
Net income attributable to Tanger Factory Outlet Centers, Inc.	24,055	23,514
Net income available to limited partners	23,814	23,281
Net income available to general partner	$ 241	$ 233
Basic earnings per common share/unit
Net income (in dollars per share)	$ 0.24	$ 0.23
Diluted earnings per common share/unit
Net income (in dollars per share)	0.24	0.23
Dividends declared per common share (in dollars per share)	$ 0.3425	$ 0.325

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Tanger Factory Outlet Centers, Inc. [Member]
Net income	$ 23,685	$ 23,514
Other comprehensive income (loss):
Foreign currency translation adjustments	(3,095)	1,010
Change in fair value of cash flow hedges	2,739	722
Other comprehensive income (loss)	(356)	1,732
Comprehensive income	23,329	25,246
Comprehensive income attributable to noncontrolling interests	(829)	(1,247)
Comprehensive income (loss) attributable to Tanger Factory Outlet Centers, Inc./Operating Partnership	22,500	23,999
Tanger Properties Limited Partnership [Member]
Net income	23,685	23,514
Other comprehensive income (loss):
Foreign currency translation adjustments	(3,095)	1,010
Change in fair value of cash flow hedges	2,739	722
Other comprehensive income (loss)	(356)	1,732
Comprehensive income	23,329	25,246
Comprehensive income attributable to noncontrolling interests	370	0
Comprehensive income (loss) attributable to Tanger Factory Outlet Centers, Inc./Operating Partnership	$ 23,699	$ 25,246

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Tanger Factory Outlet Centers, Inc. [Member]	Tanger Factory Outlet Centers, Inc. [Member]Common shares [Member]	Tanger Factory Outlet Centers, Inc. [Member]Paid in capital [Member]	Tanger Factory Outlet Centers, Inc. [Member]Accumulated distributions in excess of earnings [Member]	Tanger Factory Outlet Centers, Inc. [Member]Accumulated other comprehensive loss [Member]	Tanger Factory Outlet Centers, Inc. [Member]Total parent equity [Member]	Tanger Factory Outlet Centers, Inc. [Member]Noncontrolling interests [Member]Limited partners [Member]	Tanger Factory Outlet Centers, Inc. [Member]Noncontrolling interests [Member]Other consolidated partnerships [Member]	Tanger Properties Limited Partnership [Member]	Tanger Properties Limited Partnership [Member]Accumulated other comprehensive loss [Member]	Tanger Properties Limited Partnership [Member]Total parent equity [Member]	Tanger Properties Limited Partnership [Member]Noncontrolling interests [Member]	Tanger Properties Limited Partnership [Member]General partner [Member]	Tanger Properties Limited Partnership [Member]Limited partners [Member]
Beginning Balance at Dec. 31, 2016	$ 705,441	$ 961	$ 820,251	$ (122,701)	$ (28,295)	$ 670,216	$ 35,066	$ 159
Beginning Balance at Dec. 31, 2016										$ (29,834)	$ 705,282	$ 159	$ 6,485	$ 728,631
Balance, partners' capital, including portion attributable to noncontrolling interest at Dec. 31, 2016									$ 705,441
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,514			22,336		22,336	1,178	0	23,514		23,514	0	233	23,281
Other comprehensive loss	1,732				1,663	1,663	69		1,732	1,732	1,732
Compensation under Incentive Award Plan	3,537		3,537			3,537			3,537		3,537			3,537
Issuance of common shares upon exercise of options	54		54			54
Issuance of common units upon exercise of options									54		54			54
Grant of restricted common share awards, net of forfeitures		4	(4)
Withholding of common shares/units for employee income taxes	(2,435)		(2,435)			(2,435)			(2,435)		(2,435)			(2,435)
Adjustment for noncontrolling interests in Operating Partnership			106			106	(106)
Common distributions									(33,840)		(33,840)		(325)	(33,515)
Common dividends	(32,206)			(32,206)		(32,206)
Distributions to noncontrolling interests	(1,634)						(1,634)	0				0
Ending Balance at Mar. 31, 2017	698,003	965	821,509	(132,571)	(26,632)	663,271	34,573	159
Ending Balance at Mar. 31, 2017										(28,102)	697,844	159	6,393	719,553
Balance, partners' capital, including portion attributable to noncontrolling interest at Mar. 31, 2017									698,003
Beginning Balance at Dec. 31, 2017	612,302	946	784,782	(184,865)	(19,285)	581,578	30,724	0
Beginning Balance at Dec. 31, 2017									612,302	(20,345)	612,302	0	5,844	626,803
Balance, partners' capital, including portion attributable to noncontrolling interest at Dec. 31, 2017									612,302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,685			22,838		22,838	1,217	(370)	23,685		24,055	(370)	241	23,814
Other comprehensive loss	(356)				(338)	(338)	(18)		(356)	(356)	(356)
Compensation under Incentive Award Plan	3,656		3,656			3,656			3,656		3,656			3,656
Grant of restricted common share awards, net of forfeitures		3	(3)
Repurchased of common shares including transaction costs	(9,998)	(4)	(9,994)			(9,998)			(9,998)		(9,998)			(9,998)
Withholding of common shares/units for employee income taxes	(2,068)	(1)	(2,067)			(2,068)			(2,068)		(2,068)			(2,068)
Contributions from noncontrolling interests	445							445	445			445
Adjustment for noncontrolling interests in Operating Partnership			379			379	(379)
Common distributions									(34,100)		(34,100)		(342)	(33,758)
Common dividends	(32,389)			(32,389)		(32,389)
Distributions to noncontrolling interests	(1,786)						(1,711)	(75)	(75)			(75)
Ending Balance at Mar. 31, 2018	$ 593,491	$ 944	$ 776,753	$ (194,416)	$ (19,623)	$ 563,658	$ 29,833	$ 0
Ending Balance at Mar. 31, 2018									593,491	$ (20,701)	$ 593,491	$ 0	$ 5,743	$ 608,449
Balance, partners' capital, including portion attributable to noncontrolling interest at Mar. 31, 2018									$ 593,491

CONSOLIDATED STATEMENT OF SHAR7

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical)	3 Months Ended
	Mar. 31, 2018$ / shares$ / Unitsshares	Mar. 31, 2017$ / shares$ / Unitsshares
Tanger Factory Outlet Centers, Inc. [Member]
Common shares/units issued upon exercise of options (in shares)	0	1,800
Grant of restricted common share awards, net of forfeitures (in shares)	355,184	428,312
Shares repurchased and retired during period (in shares)	443,700	0
Shares paid for tax withholding for share based compensation (in shares)	89,437	69,886
Dividends declared per common share (in dollars per share) | $ / shares	$ 0.3425	$ 0.325
Tanger Properties Limited Partnership [Member]
Common shares/units issued upon exercise of options (in shares)	0	1,800
Grant of restricted common share awards, net of forfeitures (in shares)	355,184	428,312
Shares repurchased and retired during period (in shares)	443,700	0
Shares paid for tax withholding for share based compensation (in shares)	89,437	69,886
Common distributions (in dollars per share) | $ / Units	0.3425	0.325

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Tanger Factory Outlet Centers, Inc. [Member]
OPERATING ACTIVITIES
Net income	$ 23,685	$ 23,514
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,123	31,294
Amortization of deferred financing costs	783	878
Equity in earnings of unconsolidated joint ventures	(2,194)	(2,318)
Equity-based compensation expense	3,392	3,292
Amortization of debt (premiums) and discounts, net	101	125
Amortization (accretion) of market rent rate adjustments, net	562	722
Straight-line rent adjustments	(1,948)	(1,705)
Distributions of cumulative earnings from unconsolidated joint ventures	2,198	2,473
Changes in other assets and liabilities:
Other assets	1,714	(909)
Accounts payable and accrued expenses	(11,412)	(761)
Net cash provided by operating activities	50,004	56,605
INVESTING ACTIVITIES
Additions to rental property	(19,714)	(35,527)
Additions to investments in unconsolidated joint ventures	(514)	(1,371)
Additions to non-real estate assets	(303)	(6,949)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	4,494	3,313
Additions to deferred lease costs	(1,014)	(1,430)
Other investing activities	2,969	2,833
Net cash used in investing activities	(14,082)	(39,131)
FINANCING ACTIVITIES
Cash dividends paid	(32,389)	(32,206)
Distributions to noncontrolling interests in Operating Partnership	(1,711)	(1,634)
Proceeds from revolving credit facility	149,200	128,855
Repayments of revolving credit facility	(129,700)	(117,500)
Repayments of notes, mortgages and loans	(9,379)	(736)
Repurchase of common shares, including transaction costs	(9,998)	0
Employee income taxes paid related to shares withheld upon vesting of equity awards	(2,068)	(2,435)
Additions to deferred financing costs	(2,606)	(50)
Proceeds from exercise of options	0	54
Proceeds from other financing activities	445	3,283
Payment for other financing activities	(362)	(104)
Net cash used in financing activities	(38,568)	(22,473)
Effect of foreign currency rate changes on cash and cash equivalents	(28)	2
Net decrease in cash and cash equivalents	(2,674)	(4,997)
Cash and cash equivalents, beginning of period	6,101	12,222
Cash and cash equivalents, end of period	3,427	7,225
Tanger Properties Limited Partnership [Member]
OPERATING ACTIVITIES
Net income	23,685	23,514
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,123	31,294
Amortization of deferred financing costs	783	878
Equity in earnings of unconsolidated joint ventures	(2,194)	(2,318)
Equity-based compensation expense	3,392	3,292
Amortization of debt (premiums) and discounts, net	101	125
Amortization (accretion) of market rent rate adjustments, net	562	722
Straight-line rent adjustments	(1,948)	(1,705)
Distributions of cumulative earnings from unconsolidated joint ventures	2,198	2,473
Changes in other assets and liabilities:
Other assets	1,903	(869)
Accounts payable and accrued expenses	(11,639)	(843)
Net cash provided by operating activities	49,966	56,563
INVESTING ACTIVITIES
Additions to rental property	(19,714)	(35,527)
Additions to investments in unconsolidated joint ventures	(514)	(1,371)
Additions to non-real estate assets	(303)	(6,949)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	4,494	3,313
Additions to deferred lease costs	(1,014)	(1,430)
Other investing activities	2,969	2,833
Net cash used in investing activities	(14,082)	(39,131)
FINANCING ACTIVITIES
Cash dividends paid	(34,100)	(33,840)
Proceeds from revolving credit facility	149,200	128,855
Repayments of revolving credit facility	(129,700)	(117,500)
Repayments of notes, mortgages and loans	(9,379)	(736)
Repurchase of common shares, including transaction costs	(9,998)	0
Employee income taxes paid related to shares withheld upon vesting of equity awards	(2,068)	(2,435)
Additions to deferred financing costs	(2,606)	(50)
Proceeds from exercise of options	0	54
Proceeds from other financing activities	445	3,283
Payment for other financing activities	(362)	(104)
Net cash used in financing activities	(38,568)	(22,473)
Effect of foreign currency rate changes on cash and cash equivalents	(28)	2
Net decrease in cash and cash equivalents	(2,712)	(5,039)
Cash and cash equivalents, beginning of period	6,050	12,199
Cash and cash equivalents, end of period	$ 3,338	$ 7,160

Business

Business	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business Tanger Factory Outlet Centers, Inc. and subsidiaries is one of the largest owners and operators of outlet centers in the United States and Canada. We are a fully-integrated, self-administered and self-managed real estate investment trust ("REIT") which, through our controlling interest in the Operating Partnership, focuses exclusively on developing, acquiring, owning, operating and managing outlet shopping centers. As of March 31, 2018 , we owned and operated 36 consolidated outlet centers, with a total gross leasable area of approximately 12.9 million square feet. We also had partial ownership interests in 8 unconsolidated outlet centers totaling approximately 2.4 million square feet, including 4 outlet centers in Canada. Our outlet centers and other assets are held by, and all of our operations are conducted by, Tanger Properties Limited Partnership and subsidiaries. Accordingly, the descriptions of our business, employees and properties are also descriptions of the business, employees and properties of the Operating Partnership. Unless the context indicates otherwise, the term "Company" refers to Tanger Factory Outlet Centers, Inc. and subsidiaries and the term, "Operating Partnership", refers to Tanger Properties Limited Partnership and subsidiaries. The terms "we", "our" and "us" refer to the Company or the Company and the Operating Partnership together, as the text requires. The Company owns the majority of the units of partnership interest issued by the Operating Partnership through its two wholly-owned subsidiaries, Tanger GP Trust and Tanger LP Trust. Tanger GP Trust is the sole general partner of the Operating Partnership. Tanger LP Trust holds a limited partnership interest. As of March 31, 2018 , the Company, through its ownership of Tanger GP Trust and Tanger LP Trust, owned 94,382,583 units of the Operating Partnership and other limited partners (the "Non-Company LPs") collectively owned 4,995,433 Class A common limited partnership units. Each Class A common limited partnership unit held by the Non-Company LPs is exchangeable for one of the Company's common shares, subject to certain limitations to preserve the Company's REIT status. Class B common limited partnership units, which are held by Tanger LP Trust, are not exchangeable for common shares of the Company.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited consolidated financial statements included herein have been prepared pursuant to accounting principles generally accepted in the United States of America and should be read in conjunction with the consolidated financial statements and notes thereto of the Company's and the Operating Partnership's combined Annual Report on Form 10-K for the year ended December 31, 2017 . The December 31, 2017 balance sheet data in this Form 10-Q was derived from audited financial statements. Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the SEC's rules and regulations, although management believes that the disclosures are adequate to make the information presented not misleading. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the financial statements for the interim periods have been made. The results of interim periods are not necessarily indicative of the results for a full year. The Company currently consolidates the Operating Partnership because it has (1) the power to direct the activities of the Operating Partnership that most significantly impact the Operating Partnership’s economic performance and (2) the obligation to absorb losses and the right to receive the residual returns of the Operating Partnership that could be potentially significant. We consolidate properties that are wholly-owned and properties where we own less than 100% but we control. Control is determined using an evaluation based on accounting standards related to the consolidation of voting interest entities and variable interest entities ("VIE"). For joint ventures that are determined to be a VIE, we consolidate the entity where we are deemed to be the primary beneficiary. Determination of the primary beneficiary is based on whether an entity has (1) the power to direct the activities of the VIE that most significantly impact the entity's economic performance, and (2) the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE. Our determination of the primary beneficiary considers all relationships between us and the VIE, including management agreements and other contractual arrangements. Investments in real estate joint ventures that we do not control but may exercise significant influence are accounted for using the equity method of accounting. These investments are recorded initially at cost and subsequently adjusted for our equity in the joint venture's net income or loss, cash contributions, distributions and other adjustments required under the equity method of accounting. For certain investments in real estate joint ventures, we record our equity in the venture's net income or loss under the hypothetical liquidation at book value (“HLBV”) method of accounting due to the structures and the preferences we receive on the distributions from our joint ventures pursuant to the respective joint venture agreements for those joint ventures. Under this method, we recognize income and loss in each period based on the change in liquidation proceeds we would receive from a hypothetical liquidation of our investment based on depreciated book value. Therefore, income or loss may be allocated disproportionately as compared to the ownership percentages due to specified preferred return rate thresholds and may be more or less than actual cash distributions received and more or less than what we may receive in the event of an actual liquidation. We separately report investments in joint ventures for which accumulated distributions have exceeded investments in, and our share of net income or loss of, the joint ventures within other liabilities in the consolidated balance sheets because we are committed to provide further financial support to these joint ventures. The carrying amount of our investments in the Charlotte and Galveston/Houston joint ventures are less than zero because of financing or operating distributions that were greater than net income, as net income includes non-cash charges for depreciation and amortization. "Noncontrolling interests in the Operating Partnership" reflects the Non-Company LP's percentage ownership of the Operating Partnership's units. "Noncontrolling interests in other consolidated partnerships" consist of outside equity interests in partnerships or joint ventures not wholly-owned by the Company or the Operating Partnership that are consolidated with the financial results of the Company and Operating Partnership because the Operating Partnership exercises control over the entities that own the properties. Noncontrolling interests are initially recorded in the consolidated balance sheets at fair value based upon purchase price allocations. Income is allocated to the noncontrolling interests based on the allocation provisions within the partnership or joint venture agreements.

Investments in Unconsolidated R

Investments in Unconsolidated Real Estate Joint Ventures	3 Months Ended
	Mar. 31, 2018
Investments In Unconsolidated Real Estate Joint Ventures [Abstract]
Investments in Unconsolidated Real Estate Joint Ventures	Investments in Unconsolidated Real Estate Joint Ventures The equity method of accounting is used to account for each of the individual joint ventures. We have an ownership interest in the following unconsolidated real estate joint ventures: As of March 31, 2018 Joint Venture Outlet Center Location Ownership % Square Feet (in 000's) Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (in millions) (1) Columbus Columbus, OH 50.0 % 355 $ 0.1 $ 84.5 National Harbor National Harbor, MD 50.0 % 341 2.0 86.5 RioCan Canada Various 50.0 % 923 112.2 10.6 Investments included in investments in unconsolidated joint ventures $ 114.3 Charlotte (2) Charlotte, NC 50.0 % 398 $ (4.3 ) $ 89.9 Galveston/Houston (2) Texas City, TX 50.0 % 353 (14.7 ) 79.5 Investments included in other liabilities $ (19.0 ) As of December 31, 2017 Joint Venture Outlet Center Location Ownership % Square Feet (in 000's) Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (1) Columbus Columbus, OH 50.0 % 355 $ 1.1 $ 84.4 National Harbor National Harbor, MD 50.0 % 341 2.5 86.4 RioCan Canada Various 50.0 % 923 115.8 11.1 Investments included in investments in unconsolidated joint ventures $ 119.4 Charlotte (2) Charlotte, NC 50.0 % 398 $ (4.1 ) $ 89.8 Galveston/Houston (2) Texas City, TX 50.0 % 353 (13.0 ) 79.4 Investments included in other liabilities $ (17.1 ) (1) Net of debt origination costs and including premiums of $1.3 million and $1.4 million as of March 31, 2018 and December 31, 2017, respectively. (2) The negative carrying value is due to distributions exceeding contributions and increases or decreases from the equity in earnings of the joint venture. Fees we received for various services provided to our unconsolidated joint ventures were recognized in management, leasing and other services as follows (in thousands): Three months ended March 31, 2018 2017 Fee: Management and marketing $ 567 $ 542 Leasing and other fees 46 37 Total Fees $ 613 $ 579 Our investments in real estate joint ventures are reduced by the percentage of the profits earned for leasing and development services associated with our ownership interest in each joint venture. Our carrying value of investments in unconsolidated joint ventures differs from our share of the assets reported in the "Summary Balance Sheets - Unconsolidated Joint Ventures" shown below due to adjustments to the book basis, including intercompany profits on sales of services that are capitalized by the unconsolidated joint ventures. The differences in basis (totaling $4.1 million and $4.2 million as of March 31, 2018 and December 31, 2017 , respectively) are amortized over the various useful lives of the related assets. Condensed combined summary financial information of unconsolidated joint ventures accounted for using the equity method is as follows (in thousands): Condensed Combined Balance Sheets - Unconsolidated Joint Ventures March 31, 2018 December 31, 2017 Assets Land $ 94,138 $ 95,686 Buildings, improvements and fixtures 500,209 505,618 Construction in progress, including land under development 3,094 3,005 597,441 604,309 Accumulated depreciation (98,614 ) (93,837 ) Total rental property, net 498,827 510,472 Cash and cash equivalents 19,848 25,061 Deferred lease costs and other intangibles, net 10,405 10,985 Prepaids and other assets 14,614 15,073 Total assets $ 543,694 $ 561,591 Liabilities and Owners' Equity Mortgages payable, net $ 351,016 $ 351,259 Accounts payable and other liabilities 11,289 14,680 Total liabilities 362,305 365,939 Owners' equity 181,389 195,652 Total liabilities and owners' equity $ 543,694 $ 561,591 Three months ended Condensed Combined Statements of Operations March 31, - Unconsolidated Joint Ventures 2018 2017 Revenues $ 23,997 $ 24,062 Expenses: Property operating 9,928 9,378 General and administrative 198 120 Depreciation and amortization 6,363 7,513 Total expenses 16,489 17,011 Operating income 7,508 7,051 Interest expense (3,077 ) (2,260 ) Other non-operating income 52 2 Net income $ 4,483 $ 4,793 The Company and Operating Partnership's share of: Net income $ 2,194 $ 2,318 Depreciation and amortization expense (real estate related) $ 3,229 $ 3,838

Debt Guaranteed by the Company

Debt Guaranteed by the Company	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Debt Guaranteed by the Company	Debt Guaranteed by the Company All of the Company's debt is held by the Operating Partnership and its consolidated subsidiaries. The Company guarantees the Operating Partnership's obligations with respect to its unsecured lines of credit which have a total borrowing capacity of $600.0 million . The Company also guarantees the Operating Partnership's unsecured term loan. The Operating Partnership had the following principal amounts outstanding on the debt guaranteed by the Company (in thousands): As of March 31, 2018 December 31, 2017 Unsecured lines of credit $ 227,600 $ 208,100 Unsecured term loan $ 325,000 $ 325,000

Debt of the Operating Partnersh

Debt of the Operating Partnership	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Debt of the Operating Partnership	Debt of the Operating Partnership The debt of the Operating Partnership consisted of the following (in thousands): As of As of March 31, 2018 December 31, 2017 Stated Interest Rate(s) Maturity Date Principal Book Value (1) Principal Book Value (1) Senior, unsecured notes: Senior notes 3.875 % December 2023 $ 250,000 $ 246,192 $ 250,000 $ 246,036 Senior notes 3.750 % December 2024 250,000 247,498 250,000 247,410 Senior notes 3.125 % September 2026 350,000 345,263 350,000 345,128 Senior notes 3.875 % July 2027 300,000 296,277 300,000 296,182 Mortgages payable: Atlantic City (2)(3) 5.14%-7.65% November 2021- December 2026 36,682 39,001 37,462 39,879 Southaven LIBOR + 1.80% April 2021 51,400 51,108 60,000 59,881 Unsecured term loan LIBOR + 0.95% April 2021 325,000 323,082 325,000 322,975 Unsecured lines of credit LIBOR + 0.875% October 2021 227,600 223,634 208,100 206,160 $ 1,790,682 $ 1,772,055 $ 1,780,562 $ 1,763,651 (1) Including premiums and net of debt discount and debt origination costs. (2) The effective interest rate assigned during the purchase price allocation to the Atlantic City mortgages assumed during the acquisition in 2011 was 5.05% . (3) Principal and interest due monthly with remaining principal due at maturity. Certain of our properties, which had a net book value of approximately $189.3 million at March 31, 2018 , serve as collateral for mortgages payable. We maintain unsecured lines of credit that provide for borrowings of up to $600.0 million . The unsecured lines of credit include a $20.0 million liquidity line and a $580.0 million syndicated line. The syndicated line may be increased up to $1.2 billion through an accordion feature in certain circumstances. As of March 31, 2018 , letters of credit totaling approximately $6.0 million were issued under the lines of credit. We provide guarantees to lenders for our joint ventures which include standard non-recourse carve out indemnifications for losses arising from items such as but not limited to fraud, physical waste, payment of taxes, environmental indemnities, misapplication of insurance proceeds or security deposits and failure to maintain required insurance. For construction and term loans, we may include a guaranty of completion as well as a principal guaranty ranging from 5% to 100% of principal. The principal guarantees include terms for release or reduction based upon satisfactory completion of construction and performance targets including occupancy thresholds and minimum debt service coverage tests. As of March 31, 2018 , the maximum amount of unconsolidated joint venture debt guaranteed by the Company was $32.7 million . The unsecured lines of credit and senior unsecured notes include covenants that require the maintenance of certain ratios, including debt service coverage and leverage, and limit the payment of dividends such that dividends and distributions will not exceed funds from operations, as defined in the agreements, for the prior fiscal year on an annual basis or 95% of funds from operations on a cumulative basis. As of March 31, 2018 , we were in compliance with all of our debt covenants. Increased Borrowing Capacity and Extension of Unsecured Lines of Credit In January 2018, we closed on amendments to our unsecured lines of credit, which increased the borrowing capacity from $520.0 million to $600.0 million and extended the maturity date from October 2019 to October 2021, with a one -year extension option. We also reduced the interest rate spread over LIBOR from 0.90% to 0.875% , and increased the incremental borrowing availability through an accordion feature on the syndicated line from $1.0 billion to $1.2 billion . Loan origination costs associated with the amendments totaled approximately $2.3 million . Southaven Mortgage In February 2018, the consolidated joint venture that owns the Tanger outlet center in Southaven, Mississippi amended and restated the $60.0 million mortgage loan secured by the property that was scheduled to mature in April 2018. The amended and restated loan reduced the principal balance to $51.4 million , increased the interest rate from LIBOR + 1.75% to LIBOR + 1.80% and extended the maturity to April 2021, with a two -year extension option. In March 2018, the consolidated joint venture entered into an interest rate swap, effective March 1, 2018, that fixed the base LIBOR rate at 2.47% on a notional amount of $40.0 million through January 31, 2021. Debt Maturities Maturities of the existing long-term debt as of March 31, 2018 for the next five years and thereafter are as follows (in thousands): Calendar Year Amount 2018 $ 2,404 2019 3,369 2020 3,566 2021 609,793 2022 4,436 Thereafter 1,167,114 Subtotal 1,790,682 Net discount and debt origination costs (18,627 ) Total $ 1,772,055

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The following table summarizes the terms and fair values of our derivative financial instruments, as well as their classifications within the consolidated balance sheets (notional amounts and fair values in thousands): Fair Value Effective Date Maturity Date Notional Amount Bank Pay Rate Company Fixed Pay Rate March 31, 2018 December 31, 2017 Assets (Liabilities) (1) : November 14, 2013 August 14, 2018 $ 150,000 1 month LIBOR 1.30 % $ 369 $ 326 April 13, 2016 January 1, 2021 175,000 1 month LIBOR 1.03 % 6,636 5,207 March 1, 2018 January 31, 2021 40,000 1 month LIBOR 2.47 % (32 ) — August 14, 2018 January 1, 2021 150,000 1 month LIBOR 2.20 % 1,111 (188 ) Total $ 515,000 $ 8,084 $ 5,345 (1) Asset balances are recorded in prepaids and other assets on the consolidated balance sheets and liabilities are recorded in other liabilities on the consolidated balance sheets. The derivative financial instruments are comprised of interest rate swaps, which are designated and qualify as cash flow hedges, each with a separate counterparty. We do not use derivatives for trading or speculative purposes and currently do not have any derivatives that are not designated as hedges. The effective portion of changes in the fair value of derivatives designated and qualifying as cash flow hedges is recorded in accumulated other comprehensive loss and subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the derivative, if significant, is recognized directly in earnings. For the three months ended March 31, 2018 and 2017, the ineffective portion was not significant. The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements (in thousands): Three months ended March 31, 2018 2017 Interest Rate Swaps (Effective Portion): Amount of gain recognized in OCI on derivative $ 2,739 $ 722

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers are defined as follows: Tier Description Level 1 Observable inputs such as quoted prices in active markets Level 2 Inputs other than quoted prices in active markets that are either directly or indirectly observable Level 3 Unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions The following table sets forth our assets and liabilities that are measured at fair value within the fair value hierarchy (in thousands): Level 1 Level 2 Level 3 Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Observable Inputs Significant Unobservable Inputs Total Fair value as of March 31, 2018: Asset: Interest rate swaps (prepaids and other assets) $ 8,116 $ — $ 8,116 $ — Total assets $ 8,116 $ — $ 8,116 $ — Liabilities: Interest rate swaps (other liabilities) $ 32 $ — $ 32 $ — Total liabilities $ 32 $ — $ 32 $ — Level 1 Level 2 Level 3 Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Observable Inputs Significant Unobservable Inputs Total Fair value as of December 31, 2017: Asset: Interest rate swaps (prepaids and other assets) $ 5,533 $ — $ 5,533 $ — Total assets $ 5,533 $ — $ 5,533 $ — Liabilities: Interest rate swaps (other liabilities) $ 188 $ — $ 188 $ — Total liabilities $ 188 $ — $ 188 $ — Fair values of interest rate swaps are approximated using Level 2 inputs based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well recognized financial principles including counterparty risks, credit spreads and interest rate projections, as well as reasonable estimates about relevant future market conditions. The estimated fair value within the fair value hierarchy and recorded value of our debt consisting of senior unsecured notes, unsecured term loans, secured mortgages and unsecured lines of credit were as follows (in thousands): March 31, 2018 December 31, 2017 Level 1 Quoted Prices in Active Markets for Identical Assets or Liabilities $ — $ — Level 2 Significant Observable Inputs 1,096,355 1,139,064 Level 3 Significant Unobservable Inputs 644,249 636,476 Total fair value of debt $ 1,740,604 $ 1,775,540 Recorded value of debt $ 1,772,055 $ 1,763,651 Our senior unsecured notes are publicly-traded which provides quoted market rates. However, due to the limited trading volume of these notes, we have classified these instruments as Level 2 in the hierarchy. Our other debt is classified as Level 3 given the unobservable inputs utilized in the valuation. Our unsecured term loan, unsecured lines of credit and variable interest rate mortgages are all LIBOR based instruments. When selecting the discount rates for purposes of estimating the fair value of these instruments, we evaluated the original credit spreads and do not believe that the use of them differs materially from current credit spreads for similar instruments and therefore the recorded values of these debt instruments is considered their fair value. The carrying values of cash and cash equivalents, receivables, accounts payable, accrued expenses and other assets and liabilities are reasonable estimates of their fair values because of the short maturities of these instruments.

Share Repurchase Program

Share Repurchase Program	3 Months Ended
	Mar. 31, 2018
Share repurchase program [Abstract]
Share Repurchase Program	Share Repurchase Program In May 2017, we announced that our Board of Directors authorized the repurchase of up to $125.0 million of our outstanding common shares as market conditions warrant over a period commencing on May 19, 2017 and expiring on May 18, 2019. Repurchases may be made from time to time through open market, privately-negotiated, structured or derivative transactions (including accelerated share repurchase transactions), or other methods of acquiring shares. The Company intends to structure open market purchases to occur within pricing and volume requirements of Rule 10b-18. The Company may, from time to time, enter into Rule 10b5-1 plans to facilitate the repurchase of its shares under this authorization. During the first quarter of 2018, we repurchased approximately 443,700 common shares on the open market at an average price of $22.52 , totaling approximately $10.0 million , exclusive of commissions and related fees. The remaining amount authorized to be repurchased under the program as of March 31, 2018 was approximately $65.7 million .

Partners' Equity of the Operati

Partners' Equity of the Operating Partnership	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Schedule of Partners' Equity of the Operating Partnership [Line Items]
Partners' Equity of the Operating Partnership	Partners' Equity of the Operating Partnership All units of partnership interest issued by the Operating Partnership have equal rights with respect to earnings, dividends and net assets. When the Company issues common shares upon the exercise of options, the grant of restricted common share awards, or the exchange of Class A common limited partnership units, the Operating Partnership issues a corresponding number of Class B common limited partnership units to Tanger LP Trust, a wholly-owned subsidiary of the Company. Likewise, when the Company repurchases its outstanding common shares, the Operating Partnership repurchases a corresponding number or Class B common limited partnership units held by Tanger LP Trust. The following table sets forth the changes in outstanding partnership units for the three months ended March 31, 2018 and March 31, 2017 : Limited Partnership Units General Partnership Units Class A Class B Total Balance December 31, 2016 1,000,000 5,027,781 95,095,891 100,123,672 Grant of restricted common share awards by the Company, net of forfeitures — — 428,312 428,312 Units issued upon exercise of options — — 1,800 1,800 Units withheld for employee income taxes — — (69,886 ) (69,886 ) Balance March 31, 2017 1,000,000 5,027,781 95,456,117 100,483,898 Balance December 31, 2017 1,000,000 4,995,433 93,560,536 98,555,969 Grant of restricted common share awards by the Company, net of forfeitures — — 355,184 355,184 Repurchase of units — — (443,700 ) (443,700 ) Units withheld for employee income taxes — — (89,437 ) (89,437 ) Balance March 31, 2018 1,000,000 4,995,433 93,382,583 98,378,016

Earnings Per Share of the Compa

Earnings Per Share of the Company	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Earnings Per Share of the Company	Earnings Per Share of the Company The following table sets forth a reconciliation of the numerators and denominators in computing the Company's earnings per share (in thousands, except per share amounts): Three months ended March 31, 2018 2017 Numerator: Net income attributable to Tanger Factory Outlet Centers, Inc. $ 22,838 $ 22,336 Less allocation of earnings to participating securities (263 ) (295 ) Net income available to common shareholders of Tanger Factory Outlet Centers, Inc. $ 22,575 $ 22,041 Denominator: Basic weighted average common shares 93,644 95,245 Effect of outstanding options and certain restricted common shares — 66 Diluted weighted average common shares 93,644 95,311 Basic earnings per common share: Net income $ 0.24 $ 0.23 Diluted earnings per common share: Net income $ 0.24 $ 0.23 We determine diluted earnings per share based on the weighted average number of common shares outstanding combined with the incremental weighted average shares that would have been outstanding assuming all potentially dilutive securities were converted into common shares at the earliest date possible. Notional units granted under our equity compensation plan are considered contingently issuable common shares and are included in earnings per share if the effect is dilutive using the treasury stock method and the common shares would be issuable if the end of the reporting period were the end of the contingency period. For the three months ended March 31, 2018 and 2017, 1,013,383 and 871,116 notional units were excluded from the computation, respectively, because these notional units either would not have been issuable if the end of the reporting period were the end of the contingency period or because they were anti-dilutive. With respect to outstanding options, the effect of dilutive common shares is determined using the treasury stock method, whereby outstanding options are assumed exercised at the beginning of the reporting period and the exercise proceeds from such options and the average measured but unrecognized compensation cost during the period are assumed to be used to repurchase our common shares at the average market price during the period. For the three months ended March 31, 2018 and 2017, 564,200 and 177,700 options were excluded from the computation, respectively, as they were anti-dilutive. The assumed exchange of the partnership units held by the Non-Company LPs as of the beginning of the year, which would result in the elimination of earnings allocated to the noncontrolling interest in the Operating Partnership, would have no impact on earnings per share since the allocation of earnings to a common limited partnership unit, as if exchanged, is equivalent to earnings allocated to a common share. Certain of the Company's unvested restricted common share awards contain non-forfeitable rights to dividends or dividend equivalents. The impact of these unvested restricted common share awards on earnings per share has been calculated using the two-class method whereby earnings are allocated to the unvested restricted common share awards based on dividends declared and the unvested restricted common shares' participation rights in undistributed earnings. Unvested restricted common shares that do not contain non-forfeitable rights to dividends or dividend equivalents are included in the diluted earnings per share computation if the effect is dilutive, using the treasury stock method.

Earnings Per Unit of the Operat

Earnings Per Unit of the Operating Partnership	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Earnings Per Unit of the Operating Partnership	Earnings Per Unit of the Operating Partnership The following table sets forth a reconciliation of the numerators and denominators in computing earnings per unit (in thousands, except per unit amounts): Three months ended March 31, 2018 2017 Numerator: Net income attributable to partners of the Operating Partnership $ 24,055 $ 23,514 Less allocation of earnings to participating securities (263 ) (295 ) Net income available to common unitholders of the Operating Partnership $ 23,792 $ 23,219 Denominator: Basic weighted average common units 98,640 100,273 Effect of outstanding options and certain restricted common units — 66 Diluted weighted average common units 98,640 100,339 Basic earnings per common unit: Net income $ 0.24 $ 0.23 Diluted earnings per common unit: Net income $ 0.24 $ 0.23 We determine diluted earnings per unit based on the weighted average number of common units outstanding combined with the incremental weighted average units that would have been outstanding assuming all potentially dilutive securities were converted into common units at the earliest date possible. Notional units granted under our equity compensation plan are considered contingently issuable common units and are included in earnings per unit if the effect is dilutive using the treasury stock method and the common shares would be issuable if the end of the reporting period were the end of the contingency period. For the three months ended March 31, 2018 and 2017, 1,013,383 and 871,116 notional units were excluded from the computation, respectively, because these notional units either would not have been issuable if the end of the reporting period were the end of the contingency period or because they were anti-dilutive. With respect to outstanding options, the effect of dilutive common units is determined using the treasury stock method, whereby outstanding options are assumed exercised at the beginning of the reporting period and the exercise proceeds from such options and the average measured but unrecognized compensation cost during the period are assumed to be used to repurchase our common units at the average market price during the period. The market price of a common unit is considered to be equivalent to the market price of a Company common share. For the three months ended March 31, 2018 and 2017, 564,200 and 177,700 options excluded from the computation, respectively, as they were anti-dilutive. Certain of the Company's unvested restricted common share awards contain non-forfeitable rights to distributions or distribution equivalents. The impact of the corresponding unvested restricted unit awards on earnings per unit has been calculated using the two-class method whereby earnings are allocated to the unvested restricted unit awards based on distributions declared and the unvested restricted units' participation rights in undistributed earnings. Unvested restricted common units that do not contain non-forfeitable rights to dividends or dividend equivalents are included in the diluted earnings per unit computation if the effect is dilutive, using the treasury stock method.

Equity-Based Compensation of th

Equity-Based Compensation of the Company	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Equity-Based Compensation of the Company	Equity-Based Compensation of the Company We have a shareholder approved equity-based compensation plan, the Incentive Award Plan of Tanger Factory Outlet Centers, Inc. and Tanger Properties Limited Partnership (as amended and restated on April 4, 2014, (the "Plan"), which covers our non-employee directors, officers, employees and consultants. For each common share issued by the Company, the Operating Partnership issues one corresponding unit of partnership interest to the Company's wholly-owned subsidiaries. Therefore, when the Company grants an equity-based award, the Operating Partnership treats each award as having been granted by the Operating Partnership. In the discussion below, the term "we" refers to the Company and the Operating Partnership together and the term "shares" is meant to also include corresponding units of the Operating Partnership. We recorded equity-based compensation expense in general and administrative expenses in our consolidated statements of operations as follows (in thousands): Three months ended March 31, 2018 2017 Restricted common shares $ 2,376 $ 2,349 Notional unit performance awards 937 882 Options 79 61 Total equity-based compensation $ 3,392 $ 3,292 Equity-based compensation expense capitalized as a part of rental property and deferred lease costs were as follows (in thousands): Three months ended March 31, 2018 2017 Equity-based compensation expense capitalized $ 264 $ 246 Option Awards During February 2018, the Company granted 331,000 options to non-executive employees of the Company. The exercise price of the options granted during the first quarter of 2018 is $21.94 per share which equaled the closing market price of the Company's common shares on the day prior to the grant date. The options expire 10 years from the date of grant and 20% of the options become exercisable in each of the first five years commencing one year from the date of grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model, which resulted in a weighted average grant date fair value per share of $3.62 and included the following weighted-average assumptions: expected dividend yield 6.24% ; expected life of 7.1 years; expected volatility of 32.47% ; a risk-free rate of 2.8% ; and forfeiture rates of 3.0% to 10.0% dependent upon the employee's position within the Company. Restricted Common Share and Restricted Share Unit Awards During February 2018, the Company granted 407,156 in restricted common shares and restricted share units to the Company's non-employee directors and the Company's senior executive officers. The grant date fair value of the awards ranged from $18.65 to $21.94 per share. The non-employee directors' restricted common shares generally vest ratably over a three year period and the senior executive officers' restricted shares (other than our chief executive officer's) generally vest ratably over a three or five year period. Our chief executive officer’s restricted shares generally vest ratably over a two year period and his restricted share units generally vest on the third anniversary of the grant date. For the restricted shares issued to our chief executive officer, the restricted share agreement generally requires him to hold shares issued to him for a minimum of three years following vesting. For the restricted share units issued to our chief executive officer, the restricted share unit agreement generally requires him to hold shares issued to him thereunder for a minimum of three years following the applicable share issuance date. Compensation expense related to the amortization of the deferred compensation is being recognized in accordance with the vesting schedule of the restricted shares. For certain shares that vest during the period, we withhold shares with value equivalent up to the employees' maximum statutory obligation (minimum obligation during 2017) for the applicable income and other employment taxes, and remit cash to the appropriate taxing authorities. The total number of shares withheld upon vesting was 89,437 and 69,886 for the three months ended March 31, 2018 and March 31, 2017 , respectively. The total number of shares withheld was based on the value of the restricted common shares on the vesting date as determined by our closing share price on the day prior to the vesting date. Total amounts paid for the employees' tax obligation to taxing authorities was $2.1 million for the three months ended March 31, 2018 and was $2.4 million for the three months ended March 31, 2017 . These amounts are reflected as financing activities within the consolidated statements of cash flows. 2018 Outperformance Plan In February 2018, the Compensation Committee of Tanger Factory Outlet Centers, Inc. approved the terms of the Tanger Factory Outlet Centers, Inc. 2018 Outperformance Plan (the “2018 OPP"), a long-term incentive compensation plan. Recipients receive notional units which may convert, subject to the achievement of the goals described below, into common shares of the Company based on the Company’s absolute total shareholder return and its total shareholder return relative to its peer group over a three -year measurement period. For all recipients (other than our chief executive officer), any shares earned at the end of the three -year measurement period are issued immediately following such measurement period, but are restricted and remain subject to a time-based vesting schedule, with 50% of the shares vesting immediately following issuance, and the remaining 50% vesting one year thereafter, contingent upon continued employment with the Company through the vesting dates (unless terminated prior thereto (a) by the Company without cause, (b) by participant for good reason or (c) due to death or disability). For our chief executive officer, any shares earned at the end of the three-year measurement period remain subject to a time-based vesting schedule and are issued following vesting, with 50% of the shares vesting immediately following issuance, and the remaining 50% vesting one year thereafter, contingent upon continued employment with the Company through the vesting dates (unless terminated prior thereto (a) by the Company without cause, (b) by participant for good reason or due to retirement or (c) due to death or disability). The following table sets forth 2018 OPP performance targets and other relevant information about the 2018 OPP: Performance targets (1) Absolute portion of award: Percent of total award 33.3% Absolute total shareholder return range 19.1% - 29.5% Percentage of units to be earned 20%-100% Relative portion of award: Percent of total award 66.7% Percentile rank of peer group range (2) 30th - 80th Percentage of units to be earned 20%-100% Maximum number of restricted common shares that may be earned 409,972 Grant date fair value per share $ 12.42 (1) The number of restricted common shares received under the 2018 OPP will be determined on a pro-rata basis by linear interpolation between total shareholder return thresholds, both for absolute total shareholder return and for relative total shareholder return amongst the Company's peer group. (2) The peer group is based on companies included in the FTSE NAREIT Retail Index. The fair values of the 2018 OPP awards granted during the three months ended March 31, 2018 were determined at the grant dates using a Monte Carlo simulation pricing model and the following assumptions: Risk free interest rate (1) 2.40 % Expected dividend yield (2) 4.8 % Expected volatility (3) 27 % (1) Represents the interest rate as of the grant date on US treasury bonds having the same life as the estimated life of the restricted unit grants. (2) The dividend yield is calculated utilizing the dividends paid for the previous five-year period. (3) Based on a mix of historical and implied volatility for our common shares and the common shares of our peer index companies over the measurement period.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) of the Company	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) of the Company	Accumulated Other Comprehensive Income (Loss) of the Company The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2018 (in thousands): Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) Noncontrolling Interest in Operating Partnership Accumulated Other Comprehensive Income (Loss) Foreign Currency Cash flow hedges Total Foreign Currency Cash flow hedges Total Balance December 31, 2017 $ (24,360 ) $ 5,075 $ (19,285 ) $ (1,329 ) $ 269 $ (1,060 ) Other comprehensive income (loss) before reclassifications (2,938 ) 2,914 (24 ) (157 ) 156 (1 ) Reclassification out of accumulated other comprehensive income into interest expense — (314 ) (314 ) — (17 ) (17 ) Balance March 31, 2018 $ (27,298 ) $ 7,675 $ (19,623 ) $ (1,486 ) $ 408 $ (1,078 ) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2017 (in thousands): Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) Noncontrolling Interest in Operating Partnership Accumulated Other Comprehensive Income (Loss) Foreign Currency Cash flow hedges Total Foreign Currency Cash flow hedges Total Balance December 31, 2016 $ (32,087 ) $ 3,792 $ (28,295 ) $ (1,740 ) $ 201 $ (1,539 ) Other comprehensive income before reclassifications 959 411 1,370 51 3 54 Reclassification out of accumulated other comprehensive income into interest expense — 293 293 — 15 15 Balance March 31, 2017 $ (31,128 ) $ 4,496 $ (26,632 ) $ (1,689 ) $ 219 $ (1,470 ) We expect within the next twelve months to reclassify into earnings as a decrease to interest expense approximately $1.3 million of the amounts recorded within accumulated other comprehensive income related to the interest rate swap agreements in effect as of March 31, 2018 .

Accumulated Other Comprehensi22

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership	Accumulated Other Comprehensive Income (Loss) of the Operating Partnership The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2018 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2017 $ (25,689 ) $ 5,344 $ (20,345 ) Other comprehensive income (loss) before reclassifications (3,095 ) 3,070 (25 ) Reclassification out of accumulated other comprehensive income into interest expense — (331 ) (331 ) Balance March 31, 2018 $ (28,784 ) $ 8,083 $ (20,701 ) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2017 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2016 $ (33,827 ) $ 3,993 $ (29,834 ) Other comprehensive income before reclassifications 1,010 414 1,424 Reclassification out of accumulated other comprehensive income into interest expense — 308 308 Balance March 31, 2017 $ (32,817 ) $ 4,715 $ (28,102 ) We expect within the next twelve months to reclassify into earnings as a decrease to interest expense approximately $1.3 million of the amounts recorded within accumulated other comprehensive income related to the interest rate swap agreements in effect as of March 31, 2018 .

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2018
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	We purchase capital equipment and incur costs relating to construction of facilities, including tenant finishing allowances. Expenditures included in accounts payable and accrued expenses were as follows (in thousands): March 31, 2018 March 31, 2017 Costs relating to construction included in accounts payable and accrued expenses $ 18,978 $ 26,923 Interest paid, net of interest capitalized was as follows (in thousands): March 31, 2018 March 31, 2017 Interest paid, net of interest capitalized $ 15,903 $ 9,445

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Recently adopted accounting standards In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. This ASU requires that a statement of cash flows explain the change during the period in cash, cash equivalents, and amounts generally described as restricted cash. Amounts generally described as restricted cash should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The update should be applied retrospectively to each period presented. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017,. We adopted this pronouncement on January 1, 2018, and the pronouncement did not result in changes to our consolidated statements of cash flows as there were no restricted cash amounts included in the beginning-of-period and end-of-period cash and cash equivalents totals. In February 2017, the FASB issued ASU 2017-05, "Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets." ASU 2017-05 clarifies the definition of an in-substance nonfinancial asset and changes the accounting for partial sales of nonfinancial assets to be more consistent with the accounting for a sale of a business pursuant to ASU 2017-01. This update is effective for interim and annual periods beginning after December 15, 2017 using a full retrospective or modified retrospective method and is required to be adopted in conjunction with ASU 2014-09, "Revenue from Contracts with Customers" discussed below. We adopted ASU 2017-05 effective January 1, 2018, along with our adoption of ASU 2014-09, using the modified retrospective approach only to contracts that are not completed contracts as of January 1, 2018. Subsequent to adoption, we believe most of our future contributions of nonfinancial assets to our joint ventures where we cease to have a controlling financial interest, if any, will result in the recognition of a full gain or loss as if we sold 100% of the nonfinancial asset and we will also measure our retained interest at fair value. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers: Topic 606, as amended, (collectively, Topic 606). Topic 606 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Topic 606 applies to all contracts with customers, except those that are within the scope of other topics in the FASB's Accounting Standards Codification, including real estate lease contracts, which the majority of our revenue is derived. The guidance also provides a model for the measurement and recognition of gains and losses on the sale of certain nonfinancial assets, such as property, including real estate. We adopted Topic 606 effective January 1, 2018 using the modified retrospective approach. Results for reporting periods beginning after January 1, 2018, are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Revenue Recognition (Topic 605). The new guidance provides a unified model to determine how revenue is recognized. To determine the proper amount of revenue to be recognized, the Company performs the following steps: (i) identify the contract with the customer, (ii) identify the performance obligations within the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when (or as) a performance obligation is satisfied. As of March 31, 2018, the Company has no outstanding contract assets or contract liabilities and we did not have a cumulative catch-up upon the adoption of this standard. The adoption of this standard did not result in any material changes to our revenue recognition as compared to the previous guidance. The Company’s revenue-producing contracts are primarily leases that are not within the scope of this standard, except for the lease component relating to common area maintenance (“CAM”) reimbursement revenue, which will be within the scope of this standard upon the effective date of ASU 2016-02, Leases (Topic 842). The revenues which will be impacted by the initial adoption of Topic 606 include revenues from management, leasing and other services provided to our unconsolidated joint ventures that we manage and other income earned at our properties. We receive management, leasing and other services revenue for services provided to our unconsolidated joint ventures that we manage. We recognize management and other services provided to our unconsolidated joint ventures in revenue as the services are transferred. Our other income earned at our properties consist primarily of revenues from vending and other on-site services or products provided to shoppers or tenants. The other income earned at our properties is recorded as the goods are transferred at a point in time or as the service is transferred over time. We have elected to disaggregate our revenue streams into the following line items on our Consolidated Statements of Operations: base rentals, percentage rentals, expense reimbursements, management, leasing and other services, and other income. We believe that these are the proper disaggregated categories as they are the best depiction of our revenue streams both qualitatively and quantitatively. Recently issued accounting standards to be adopted In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities. The new guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. It is intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The amendments can be adopted immediately in any interim or annual period (including the current period). The mandatory effective date for calendar year-end public companies is January 1, 2019. We are currently evaluating the impact of adopting the new guidance, but we do not expect the adoption to have a material impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), issued subsequent amendments to the initial guidance in September 2017 within ASU 2017-13 and January 2018 within ASU 2018-01 (collectively, Topic 842). Topic 842, amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. Topic 842 will be effective beginning in the first quarter of 2019. Early adoption of Topic 842 as of its issuance is permitted. We will adopt Topic 842 effective January 1, 2019. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. Based on a preliminary assessment, we expect our significant operating lease commitments, primarily ground leases at seven of our outlet centers, will be required to be recognized as operating lease liabilities and right-of-use assets upon adoption, resulting in an increase in the assets and liabilities on our consolidated balance sheets. In addition, direct internal leasing costs will continue to be capitalized, however, indirect internal leasing costs previously capitalized will be expensed. Within the terms of our leases where we are the lessor, we are entitled to receive reimbursement amounts from tenants for operating expenses such as real estate taxes, insurance and other CAM. Upon adoption of this ASU, CAM reimbursement revenue will be accounted for in accordance with ASU 2016-12 Revenue from Contracts with Customers (Topic 606). We are continuing our evaluation, which may identify additional impacts this standard will have on our consolidated financial statements and related disclosures. Information about our undiscounted future lease payments and the timing of those payments is in Note 23, Commitments and Contingencies of Consolidated Properties, in our Form 10-K for the year ended December 31, 2017.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In April 2018, the Company's Board of Directors declared a $0.35 cash dividend per common share payable on May 15, 2018 to each shareholder of record on April 30, 2018, and the Trustees of Tanger GP Trust declared a $0.35 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders.

Basis of Presentation Accountin

Basis of Presentation Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Accounting [Policy Text Block]	The unaudited consolidated financial statements included herein have been prepared pursuant to accounting principles generally accepted in the United States of America and should be read in conjunction with the consolidated financial statements and notes thereto of the Company's and the Operating Partnership's combined Annual Report on Form 10-K for the year ended December 31, 2017 . The December 31, 2017 balance sheet data in this Form 10-Q was derived from audited financial statements. Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the SEC's rules and regulations, although management believes that the disclosures are adequate to make the information presented not misleading. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the financial statements for the interim periods have been made. The results of interim periods are not necessarily indicative of the results for a full year.
Consolidation [Policy Text Block]	The Company currently consolidates the Operating Partnership because it has (1) the power to direct the activities of the Operating Partnership that most significantly impact the Operating Partnership’s economic performance and (2) the obligation to absorb losses and the right to receive the residual returns of the Operating Partnership that could be potentially significant. We consolidate properties that are wholly-owned and properties where we own less than 100% but we control. Control is determined using an evaluation based on accounting standards related to the consolidation of voting interest entities and variable interest entities ("VIE"). For joint ventures that are determined to be a VIE, we consolidate the entity where we are deemed to be the primary beneficiary. Determination of the primary beneficiary is based on whether an entity has (1) the power to direct the activities of the VIE that most significantly impact the entity's economic performance, and (2) the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE. Our determination of the primary beneficiary considers all relationships between us and the VIE, including management agreements and other contractual arrangements. Investments in real estate joint ventures that we do not control but may exercise significant influence are accounted for using the equity method of accounting. These investments are recorded initially at cost and subsequently adjusted for our equity in the joint venture's net income or loss, cash contributions, distributions and other adjustments required under the equity method of accounting. For certain investments in real estate joint ventures, we record our equity in the venture's net income or loss under the hypothetical liquidation at book value (“HLBV”) method of accounting due to the structures and the preferences we receive on the distributions from our joint ventures pursuant to the respective joint venture agreements for those joint ventures. Under this method, we recognize income and loss in each period based on the change in liquidation proceeds we would receive from a hypothetical liquidation of our investment based on depreciated book value. Therefore, income or loss may be allocated disproportionately as compared to the ownership percentages due to specified preferred return rate thresholds and may be more or less than actual cash distributions received and more or less than what we may receive in the event of an actual liquidation. We separately report investments in joint ventures for which accumulated distributions have exceeded investments in, and our share of net income or loss of, the joint ventures within other liabilities in the consolidated balance sheets because we are committed to provide further financial support to these joint ventures. The carrying amount of our investments in the Charlotte and Galveston/Houston joint ventures are less than zero because of financing or operating distributions that were greater than net income, as net income includes non-cash charges for depreciation and amortization. "Noncontrolling interests in the Operating Partnership" reflects the Non-Company LP's percentage ownership of the Operating Partnership's units. "Noncontrolling interests in other consolidated partnerships" consist of outside equity interests in partnerships or joint ventures not wholly-owned by the Company or the Operating Partnership that are consolidated with the financial results of the Company and Operating Partnership because the Operating Partnership exercises control over the entities that own the properties. Noncontrolling interests are initially recorded in the consolidated balance sheets at fair value based upon purchase price allocations. Income is allocated to the noncontrolling interests based on the allocation provisions within the partnership or joint venture agreements.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Recently adopted accounting standards In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. This ASU requires that a statement of cash flows explain the change during the period in cash, cash equivalents, and amounts generally described as restricted cash. Amounts generally described as restricted cash should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The update should be applied retrospectively to each period presented. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017,. We adopted this pronouncement on January 1, 2018, and the pronouncement did not result in changes to our consolidated statements of cash flows as there were no restricted cash amounts included in the beginning-of-period and end-of-period cash and cash equivalents totals. In February 2017, the FASB issued ASU 2017-05, "Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets." ASU 2017-05 clarifies the definition of an in-substance nonfinancial asset and changes the accounting for partial sales of nonfinancial assets to be more consistent with the accounting for a sale of a business pursuant to ASU 2017-01. This update is effective for interim and annual periods beginning after December 15, 2017 using a full retrospective or modified retrospective method and is required to be adopted in conjunction with ASU 2014-09, "Revenue from Contracts with Customers" discussed below. We adopted ASU 2017-05 effective January 1, 2018, along with our adoption of ASU 2014-09, using the modified retrospective approach only to contracts that are not completed contracts as of January 1, 2018. Subsequent to adoption, we believe most of our future contributions of nonfinancial assets to our joint ventures where we cease to have a controlling financial interest, if any, will result in the recognition of a full gain or loss as if we sold 100% of the nonfinancial asset and we will also measure our retained interest at fair value. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers: Topic 606, as amended, (collectively, Topic 606). Topic 606 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Topic 606 applies to all contracts with customers, except those that are within the scope of other topics in the FASB's Accounting Standards Codification, including real estate lease contracts, which the majority of our revenue is derived. The guidance also provides a model for the measurement and recognition of gains and losses on the sale of certain nonfinancial assets, such as property, including real estate. We adopted Topic 606 effective January 1, 2018 using the modified retrospective approach. Results for reporting periods beginning after January 1, 2018, are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Revenue Recognition (Topic 605). The new guidance provides a unified model to determine how revenue is recognized. To determine the proper amount of revenue to be recognized, the Company performs the following steps: (i) identify the contract with the customer, (ii) identify the performance obligations within the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when (or as) a performance obligation is satisfied. As of March 31, 2018, the Company has no outstanding contract assets or contract liabilities and we did not have a cumulative catch-up upon the adoption of this standard. The adoption of this standard did not result in any material changes to our revenue recognition as compared to the previous guidance. The Company’s revenue-producing contracts are primarily leases that are not within the scope of this standard, except for the lease component relating to common area maintenance (“CAM”) reimbursement revenue, which will be within the scope of this standard upon the effective date of ASU 2016-02, Leases (Topic 842). The revenues which will be impacted by the initial adoption of Topic 606 include revenues from management, leasing and other services provided to our unconsolidated joint ventures that we manage and other income earned at our properties. We receive management, leasing and other services revenue for services provided to our unconsolidated joint ventures that we manage. We recognize management and other services provided to our unconsolidated joint ventures in revenue as the services are transferred. Our other income earned at our properties consist primarily of revenues from vending and other on-site services or products provided to shoppers or tenants. The other income earned at our properties is recorded as the goods are transferred at a point in time or as the service is transferred over time. We have elected to disaggregate our revenue streams into the following line items on our Consolidated Statements of Operations: base rentals, percentage rentals, expense reimbursements, management, leasing and other services, and other income. We believe that these are the proper disaggregated categories as they are the best depiction of our revenue streams both qualitatively and quantitatively. Recently issued accounting standards to be adopted In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities. The new guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. It is intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The amendments can be adopted immediately in any interim or annual period (including the current period). The mandatory effective date for calendar year-end public companies is January 1, 2019. We are currently evaluating the impact of adopting the new guidance, but we do not expect the adoption to have a material impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), issued subsequent amendments to the initial guidance in September 2017 within ASU 2017-13 and January 2018 within ASU 2018-01 (collectively, Topic 842). Topic 842, amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. Topic 842 will be effective beginning in the first quarter of 2019. Early adoption of Topic 842 as of its issuance is permitted. We will adopt Topic 842 effective January 1, 2019. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. Based on a preliminary assessment, we expect our significant operating lease commitments, primarily ground leases at seven of our outlet centers, will be required to be recognized as operating lease liabilities and right-of-use assets upon adoption, resulting in an increase in the assets and liabilities on our consolidated balance sheets. In addition, direct internal leasing costs will continue to be capitalized, however, indirect internal leasing costs previously capitalized will be expensed. Within the terms of our leases where we are the lessor, we are entitled to receive reimbursement amounts from tenants for operating expenses such as real estate taxes, insurance and other CAM. Upon adoption of this ASU, CAM reimbursement revenue will be accounted for in accordance with ASU 2016-12 Revenue from Contracts with Customers (Topic 606). We are continuing our evaluation, which may identify additional impacts this standard will have on our consolidated financial statements and related disclosures. Information about our undiscounted future lease payments and the timing of those payments is in Note 23, Commitments and Contingencies of Consolidated Properties, in our Form 10-K for the year ended December 31, 2017.

Investments in Unconsolidated28

Investments in Unconsolidated Real Estate Joint Ventures (Tables)	3 Months Ended
	Mar. 31, 2018
Investments In Unconsolidated Real Estate Joint Ventures [Abstract]
Schedule of Equity Method Investments	We have an ownership interest in the following unconsolidated real estate joint ventures: As of March 31, 2018 Joint Venture Outlet Center Location Ownership % Square Feet (in 000's) Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (in millions) (1) Columbus Columbus, OH 50.0 % 355 $ 0.1 $ 84.5 National Harbor National Harbor, MD 50.0 % 341 2.0 86.5 RioCan Canada Various 50.0 % 923 112.2 10.6 Investments included in investments in unconsolidated joint ventures $ 114.3 Charlotte (2) Charlotte, NC 50.0 % 398 $ (4.3 ) $ 89.9 Galveston/Houston (2) Texas City, TX 50.0 % 353 (14.7 ) 79.5 Investments included in other liabilities $ (19.0 ) As of December 31, 2017 Joint Venture Outlet Center Location Ownership % Square Feet (in 000's) Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (1) Columbus Columbus, OH 50.0 % 355 $ 1.1 $ 84.4 National Harbor National Harbor, MD 50.0 % 341 2.5 86.4 RioCan Canada Various 50.0 % 923 115.8 11.1 Investments included in investments in unconsolidated joint ventures $ 119.4 Charlotte (2) Charlotte, NC 50.0 % 398 $ (4.1 ) $ 89.8 Galveston/Houston (2) Texas City, TX 50.0 % 353 (13.0 ) 79.4 Investments included in other liabilities $ (17.1 ) (1) Net of debt origination costs and including premiums of $1.3 million and $1.4 million as of March 31, 2018 and December 31, 2017, respectively. (2) The negative carrying value is due to distributions exceeding contributions and increases or decreases from the equity in earnings of the joint venture.
Schedule of Development, Loan Guarantee, Management, Leasing, and Marketing Fees Paid By Unconsolidated JVs	Fees we received for various services provided to our unconsolidated joint ventures were recognized in management, leasing and other services as follows (in thousands): Three months ended March 31, 2018 2017 Fee: Management and marketing $ 567 $ 542 Leasing and other fees 46 37 Total Fees $ 613 $ 579
Summary Financial Information of Unconsolidated JVs Balance Sheet	Condensed combined summary financial information of unconsolidated joint ventures accounted for using the equity method is as follows (in thousands): Condensed Combined Balance Sheets - Unconsolidated Joint Ventures March 31, 2018 December 31, 2017 Assets Land $ 94,138 $ 95,686 Buildings, improvements and fixtures 500,209 505,618 Construction in progress, including land under development 3,094 3,005 597,441 604,309 Accumulated depreciation (98,614 ) (93,837 ) Total rental property, net 498,827 510,472 Cash and cash equivalents 19,848 25,061 Deferred lease costs and other intangibles, net 10,405 10,985 Prepaids and other assets 14,614 15,073 Total assets $ 543,694 $ 561,591 Liabilities and Owners' Equity Mortgages payable, net $ 351,016 $ 351,259 Accounts payable and other liabilities 11,289 14,680 Total liabilities 362,305 365,939 Owners' equity 181,389 195,652 Total liabilities and owners' equity $ 543,694 $ 561,591
Summary Financial Information Of Unconsolidated JVs Statements of Operations	Three months ended Condensed Combined Statements of Operations March 31, - Unconsolidated Joint Ventures 2018 2017 Revenues $ 23,997 $ 24,062 Expenses: Property operating 9,928 9,378 General and administrative 198 120 Depreciation and amortization 6,363 7,513 Total expenses 16,489 17,011 Operating income 7,508 7,051 Interest expense (3,077 ) (2,260 ) Other non-operating income 52 2 Net income $ 4,483 $ 4,793 The Company and Operating Partnership's share of: Net income $ 2,194 $ 2,318 Depreciation and amortization expense (real estate related) $ 3,229 $ 3,838

Debt Guaranteed by the Company

Debt Guaranteed by the Company (Tables)	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Debt Instrument [Line Items]
Schedule of Debt	The Operating Partnership had the following principal amounts outstanding on the debt guaranteed by the Company (in thousands): As of March 31, 2018 December 31, 2017 Unsecured lines of credit $ 227,600 $ 208,100 Unsecured term loan $ 325,000 $ 325,000

Debt of the Operating Partner30

Debt of the Operating Partnership (Tables) - Tanger Properties Limited Partnership [Member]	3 Months Ended
	Mar. 31, 2018
Schedule of Debt	The debt of the Operating Partnership consisted of the following (in thousands): As of As of March 31, 2018 December 31, 2017 Stated Interest Rate(s) Maturity Date Principal Book Value (1) Principal Book Value (1) Senior, unsecured notes: Senior notes 3.875 % December 2023 $ 250,000 $ 246,192 $ 250,000 $ 246,036 Senior notes 3.750 % December 2024 250,000 247,498 250,000 247,410 Senior notes 3.125 % September 2026 350,000 345,263 350,000 345,128 Senior notes 3.875 % July 2027 300,000 296,277 300,000 296,182 Mortgages payable: Atlantic City (2)(3) 5.14%-7.65% November 2021- December 2026 36,682 39,001 37,462 39,879 Southaven LIBOR + 1.80% April 2021 51,400 51,108 60,000 59,881 Unsecured term loan LIBOR + 0.95% April 2021 325,000 323,082 325,000 322,975 Unsecured lines of credit LIBOR + 0.875% October 2021 227,600 223,634 208,100 206,160 $ 1,790,682 $ 1,772,055 $ 1,780,562 $ 1,763,651 (1) Including premiums and net of debt discount and debt origination costs. (2) The effective interest rate assigned during the purchase price allocation to the Atlantic City mortgages assumed during the acquisition in 2011 was 5.05% . (3) Principal and interest due monthly with remaining principal due at maturity.
Schedule of Maturities of Long-term Debt	Maturities of the existing long-term debt as of March 31, 2018 for the next five years and thereafter are as follows (in thousands): Calendar Year Amount 2018 $ 2,404 2019 3,369 2020 3,566 2021 609,793 2022 4,436 Thereafter 1,167,114 Subtotal 1,790,682 Net discount and debt origination costs (18,627 ) Total $ 1,772,055

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table summarizes the terms and fair values of our derivative financial instruments, as well as their classifications within the consolidated balance sheets (notional amounts and fair values in thousands): Fair Value Effective Date Maturity Date Notional Amount Bank Pay Rate Company Fixed Pay Rate March 31, 2018 December 31, 2017 Assets (Liabilities) (1) : November 14, 2013 August 14, 2018 $ 150,000 1 month LIBOR 1.30 % $ 369 $ 326 April 13, 2016 January 1, 2021 175,000 1 month LIBOR 1.03 % 6,636 5,207 March 1, 2018 January 31, 2021 40,000 1 month LIBOR 2.47 % (32 ) — August 14, 2018 January 1, 2021 150,000 1 month LIBOR 2.20 % 1,111 (188 ) Total $ 515,000 $ 8,084 $ 5,345
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)	The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements (in thousands): Three months ended March 31, 2018 2017 Interest Rate Swaps (Effective Portion): Amount of gain recognized in OCI on derivative $ 2,739 $ 722

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table sets forth our assets and liabilities that are measured at fair value within the fair value hierarchy (in thousands): Level 1 Level 2 Level 3 Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Observable Inputs Significant Unobservable Inputs Total Fair value as of March 31, 2018: Asset: Interest rate swaps (prepaids and other assets) $ 8,116 $ — $ 8,116 $ — Total assets $ 8,116 $ — $ 8,116 $ — Liabilities: Interest rate swaps (other liabilities) $ 32 $ — $ 32 $ — Total liabilities $ 32 $ — $ 32 $ — Level 1 Level 2 Level 3 Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Observable Inputs Significant Unobservable Inputs Total Fair value as of December 31, 2017: Asset: Interest rate swaps (prepaids and other assets) $ 5,533 $ — $ 5,533 $ — Total assets $ 5,533 $ — $ 5,533 $ — Liabilities: Interest rate swaps (other liabilities) $ 188 $ — $ 188 $ — Total liabilities $ 188 $ — $ 188 $ —
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The estimated fair value within the fair value hierarchy and recorded value of our debt consisting of senior unsecured notes, unsecured term loans, secured mortgages and unsecured lines of credit were as follows (in thousands): March 31, 2018 December 31, 2017 Level 1 Quoted Prices in Active Markets for Identical Assets or Liabilities $ — $ — Level 2 Significant Observable Inputs 1,096,355 1,139,064 Level 3 Significant Unobservable Inputs 644,249 636,476 Total fair value of debt $ 1,740,604 $ 1,775,540 Recorded value of debt $ 1,772,055 $ 1,763,651

Partners' Equity of the Opera33

Partners' Equity of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Schedule of Partners' Equity of the Operating Partnership [Line Items]
Schedule of Partners' Equity of the Operating Partnership	The following table sets forth the changes in outstanding partnership units for the three months ended March 31, 2018 and March 31, 2017 : Limited Partnership Units General Partnership Units Class A Class B Total Balance December 31, 2016 1,000,000 5,027,781 95,095,891 100,123,672 Grant of restricted common share awards by the Company, net of forfeitures — — 428,312 428,312 Units issued upon exercise of options — — 1,800 1,800 Units withheld for employee income taxes — — (69,886 ) (69,886 ) Balance March 31, 2017 1,000,000 5,027,781 95,456,117 100,483,898 Balance December 31, 2017 1,000,000 4,995,433 93,560,536 98,555,969 Grant of restricted common share awards by the Company, net of forfeitures — — 355,184 355,184 Repurchase of units — — (443,700 ) (443,700 ) Units withheld for employee income taxes — — (89,437 ) (89,437 ) Balance March 31, 2018 1,000,000 4,995,433 93,382,583 98,378,016

Earnings Per Share of the Com34

Earnings Per Share of the Company (Tables)	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth a reconciliation of the numerators and denominators in computing the Company's earnings per share (in thousands, except per share amounts): Three months ended March 31, 2018 2017 Numerator: Net income attributable to Tanger Factory Outlet Centers, Inc. $ 22,838 $ 22,336 Less allocation of earnings to participating securities (263 ) (295 ) Net income available to common shareholders of Tanger Factory Outlet Centers, Inc. $ 22,575 $ 22,041 Denominator: Basic weighted average common shares 93,644 95,245 Effect of outstanding options and certain restricted common shares — 66 Diluted weighted average common shares 93,644 95,311 Basic earnings per common share: Net income $ 0.24 $ 0.23 Diluted earnings per common share: Net income $ 0.24 $ 0.23

Earnings Per Unit of the Oper35

Earnings Per Unit of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth a reconciliation of the numerators and denominators in computing earnings per unit (in thousands, except per unit amounts): Three months ended March 31, 2018 2017 Numerator: Net income attributable to partners of the Operating Partnership $ 24,055 $ 23,514 Less allocation of earnings to participating securities (263 ) (295 ) Net income available to common unitholders of the Operating Partnership $ 23,792 $ 23,219 Denominator: Basic weighted average common units 98,640 100,273 Effect of outstanding options and certain restricted common units — 66 Diluted weighted average common units 98,640 100,339 Basic earnings per common unit: Net income $ 0.24 $ 0.23 Diluted earnings per common unit: Net income $ 0.24 $ 0.23

Equity-Based Compensation of 36

Equity-Based Compensation of the Company (Tables) - Tanger Factory Outlet Centers, Inc. [Member]	3 Months Ended
	Mar. 31, 2018
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	We recorded equity-based compensation expense in general and administrative expenses in our consolidated statements of operations as follows (in thousands): Three months ended March 31, 2018 2017 Restricted common shares $ 2,376 $ 2,349 Notional unit performance awards 937 882 Options 79 61 Total equity-based compensation $ 3,392 $ 3,292 Equity-based compensation expense capitalized as a part of rental property and deferred lease costs were as follows (in thousands): Three months ended March 31, 2018 2017 Equity-based compensation expense capitalized $ 264 $ 246
Schedule of Nonvested Performance-based Units Activity	The following table sets forth 2018 OPP performance targets and other relevant information about the 2018 OPP: Performance targets (1) Absolute portion of award: Percent of total award 33.3% Absolute total shareholder return range 19.1% - 29.5% Percentage of units to be earned 20%-100% Relative portion of award: Percent of total award 66.7% Percentile rank of peer group range (2) 30th - 80th Percentage of units to be earned 20%-100% Maximum number of restricted common shares that may be earned 409,972 Grant date fair value per share $ 12.42 (1) The number of restricted common shares received under the 2018 OPP will be determined on a pro-rata basis by linear interpolation between total shareholder return thresholds, both for absolute total shareholder return and for relative total shareholder return amongst the Company's peer group. (2) The peer group is based on companies included in the FTSE NAREIT Retail Index.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair values of the 2018 OPP awards granted during the three months ended March 31, 2018 were determined at the grant dates using a Monte Carlo simulation pricing model and the following assumptions: Risk free interest rate (1) 2.40 % Expected dividend yield (2) 4.8 % Expected volatility (3) 27 % (1) Represents the interest rate as of the grant date on US treasury bonds having the same life as the estimated life of the restricted unit grants. (2) The dividend yield is calculated utilizing the dividends paid for the previous five-year period. (3) Based on a mix of historical and implied volatility for our common shares and the common shares of our peer index companies over the measurement period.

Accumulated Other Comprehensi37

Accumulated Other Comprehensive Income (Loss) of the Company (Tables)	3 Months Ended
	Mar. 31, 2018
Tanger Factory Outlet Centers, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2018 (in thousands): Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) Noncontrolling Interest in Operating Partnership Accumulated Other Comprehensive Income (Loss) Foreign Currency Cash flow hedges Total Foreign Currency Cash flow hedges Total Balance December 31, 2017 $ (24,360 ) $ 5,075 $ (19,285 ) $ (1,329 ) $ 269 $ (1,060 ) Other comprehensive income (loss) before reclassifications (2,938 ) 2,914 (24 ) (157 ) 156 (1 ) Reclassification out of accumulated other comprehensive income into interest expense — (314 ) (314 ) — (17 ) (17 ) Balance March 31, 2018 $ (27,298 ) $ 7,675 $ (19,623 ) $ (1,486 ) $ 408 $ (1,078 ) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2017 (in thousands): Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) Noncontrolling Interest in Operating Partnership Accumulated Other Comprehensive Income (Loss) Foreign Currency Cash flow hedges Total Foreign Currency Cash flow hedges Total Balance December 31, 2016 $ (32,087 ) $ 3,792 $ (28,295 ) $ (1,740 ) $ 201 $ (1,539 ) Other comprehensive income before reclassifications 959 411 1,370 51 3 54 Reclassification out of accumulated other comprehensive income into interest expense — 293 293 — 15 15 Balance March 31, 2017 $ (31,128 ) $ 4,496 $ (26,632 ) $ (1,689 ) $ 219 $ (1,470 )

Accumulated Other Comprehensi38

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2018
Tanger Properties Limited Partnership [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2018 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2017 $ (25,689 ) $ 5,344 $ (20,345 ) Other comprehensive income (loss) before reclassifications (3,095 ) 3,070 (25 ) Reclassification out of accumulated other comprehensive income into interest expense — (331 ) (331 ) Balance March 31, 2018 $ (28,784 ) $ 8,083 $ (20,701 ) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three months ended March 31, 2017 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2016 $ (33,827 ) $ 3,993 $ (29,834 ) Other comprehensive income before reclassifications 1,010 414 1,424 Reclassification out of accumulated other comprehensive income into interest expense — 308 308 Balance March 31, 2017 $ (32,817 ) $ 4,715 $ (28,102 )

Supplemental Cash Flow Inform39

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2018
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Expenditures included in accounts payable and accrued expenses were as follows (in thousands): March 31, 2018 March 31, 2017 Costs relating to construction included in accounts payable and accrued expenses $ 18,978 $ 26,923 Interest paid, net of interest capitalized was as follows (in thousands): March 31, 2018 March 31, 2017 Interest paid, net of interest capitalized $ 15,903 $ 9,445

Business (Details)

Business (Details) ft² in Millions	Mar. 31, 2018ft²sharesOutletCentersubsidiary
Entity Information [Line Items]
Number of Operating Partnership Units Owned by the Company | shares	94,382,583
Exchange ratio of Partnership Units for common shares	1
Consolidated Properties [Member]
Entity Information [Line Items]
Number of Outlet Centers	36
Total gross leaseable area of outlet centers (in square feet) | ft²	12.9
Unconsolidated Properties [Member]
Entity Information [Line Items]
Number of Outlet Centers	8
Total gross leaseable area of outlet centers (in square feet) | ft²	2.4
Unconsolidated Properties [Member] | CANADA
Entity Information [Line Items]
Number of Outlet Centers	4
Tanger Factory Outlet Centers, Inc. [Member]
Entity Information [Line Items]
Number of wholly-owned subsidiaries | subsidiary	2
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member]
Entity Information [Line Items]
Number of Operating Partnership units owned by the Operating Partnership and other limited partners | shares	4,995,433

Investments in Unconsolidated41

Investments in Unconsolidated Real Estate Joint Ventures (Unconsolidated Real Estate Joint Ventures) (Details) ft² in Thousands, $ in Thousands	Mar. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)ft²
Columbus National Harbor RioCan Canada [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value of Investment	$ 114,300	$ 119,400
Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	355	355
Carrying Value of Investment	$ 100	$ 1,100
National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	341	341
Carrying Value of Investment	$ 2,000	$ 2,500
RioCan Canda [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	923	923
Carrying Value of Investment	$ 112,200	$ 115,800
Charlotte and Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Reported In Liabilities	$ (19,000)	$ (17,100)
Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	398	398
Equity Method Investment Reported In Liabilities	$ (4,300)	$ (4,100)
Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	353	353
Equity Method Investment Reported In Liabilities	$ (14,700)	$ (13,000)
Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	351,016	351,259
Unconsolidated Properties [Member] | Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	84,500	84,400
Unconsolidated Properties [Member] | National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	86,500	86,400
Unconsolidated Properties [Member] | RioCan Canda [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	10,600	11,100
Unconsolidated Properties [Member] | Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	89,900	89,800
Unconsolidated Properties [Member] | Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	79,500	79,400
Mortgages [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Net discount and debt origination costs	$ 1,300	$ 1,400

Investments in Unconsolidated42

Investments in Unconsolidated Real Estate Joint Ventures (Joint Venture Fees) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Management, Leasing and other services [Line Items]
Fees received	$ 613	$ 579
Management and Marketing Fee [Member]
Management, Leasing and other services [Line Items]
Fees received	567	542
Leasing and other fees [Member]
Management, Leasing and other services [Line Items]
Fees received	$ 46	$ 37

Investments in Unconsolidated43

Investments in Unconsolidated Real Estate Joint Ventures (Summary Balance Sheets for Unconsolidated Joint Ventures) (Details) - Unconsolidated Properties [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Land	$ 94,138	$ 95,686
Buildings, improvements and fixtures	500,209	505,618
Construction in progress, including land under development	3,094	3,005
Rental property, at cost, total	597,441	604,309
Accumulated depreciation	(98,614)	(93,837)
Total rental property, net	498,827	510,472
Cash and cash equivalents	19,848	25,061
Deferred lease costs and other intangibles, net	10,405	10,985
Prepaids and other assets	14,614	15,073
Total assets	543,694	561,591
Liabilities and Owners' Equity
Mortgages payable, net	351,016	351,259
Accounts payable and other liabilities	11,289	14,680
Total liabilities	362,305	365,939
Owners' equity	181,389	195,652
Total liabilities and owners' equity	$ 543,694	$ 561,591

Investments in Unconsolidated44

Investments in Unconsolidated Real Estate Joint Ventures (Summary Statements of Operations for Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Unconsolidated Properties [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	$ 23,997	$ 24,062
Expenses:
Property operating	9,928	9,378
General and administrative	198	120
Depreciation and amortization	6,363	7,513
Total expenses	16,489	17,011
Operating income	7,508	7,051
Interest expense	(3,077)	(2,260)
Other non-operating income (expense)	52	2
Net income	4,483	4,793
Tanger Factory Outlet Centers, Inc. [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	123,535	121,368
Expenses:
Property operating	42,218	40,387
General and administrative	11,112	11,412
Depreciation and amortization	33,123	31,294
Total expenses	86,453	83,720
Operating income	37,082	37,648
Interest expense	(15,800)	(16,487)
Other non-operating income (expense)	209	35
Net income	23,685	23,514
The Company and Operating Partnership's share of:
Net income	2,194	2,318
Depreciation and amortization expense (real estate related)	$ 3,229	$ 3,838

Investments in Unconsolidated45

Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Differences in basis	$ 4.1	$ 4.2

Debt Guaranteed by the Compan46

Debt Guaranteed by the Company (Details) - Debt [Member] - USD ($)	Mar. 31, 2018	Jan. 31, 2018	Dec. 31, 2017
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit, Maximum borrowing capacity	$ 600,000,000	$ 600,000,000	$ 520,000,000
Tanger Factory Outlet Centers, Inc. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Guarantor obligation	227,600,000		208,100,000
Tanger Factory Outlet Centers, Inc. [Member] | Unsecured Term Loan [Member]
Line of Credit Facility [Line Items]
Guarantor obligation	$ 325,000,000		$ 325,000,000

Debt of the Operating Partner47

Debt of the Operating Partnership (Schedule of Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($)	Jan. 31, 2018	Dec. 31, 2017	Feb. 28, 2018	Jan. 31, 2018	Mar. 31, 2018	Dec. 31, 2011
Debt Instrument [Line Items]
Principal		$ 1,780,562,000			$ 1,790,682,000
Book value of debt		1,763,651,000			$ 1,772,055,000
Senior Notes [Member] | 3.875% 2023 Senior Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)					3.875%
Principal		250,000,000			$ 250,000,000
Book value of debt		246,036,000			$ 246,192,000
Senior Notes [Member] | 3.75% 2024 Senior Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)					3.75%
Principal		250,000,000			$ 250,000,000
Book value of debt		247,410,000			$ 247,498,000
Senior Notes [Member] | 3.125% 2026 Senior Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)					3.125%
Principal		350,000,000			$ 350,000,000
Book value of debt		345,128,000			$ 345,263,000
Senior Notes [Member] | 3.875% 2027 Senior Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)					3.875%
Principal		300,000,000			$ 300,000,000
Book value of debt		296,182,000			296,277,000
Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Principal		37,462,000			36,682,000
Book value of debt		39,879,000			39,001,000
Effective interest rates						5.05%
Mortgages Payable [Member] | Southaven [Member]
Debt Instrument [Line Items]
Principal	$ 60,000,000	60,000,000	$ 51,400,000	$ 60,000,000	51,400,000
Book value of debt		59,881,000			51,108,000
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Principal		325,000,000			325,000,000
Book value of debt		322,975,000			323,082,000
Line of Credit [Member]
Debt Instrument [Line Items]
Principal		208,100,000			227,600,000
Book value of debt		$ 206,160,000			$ 223,634,000
London Interbank Offered Rate (LIBOR) [Member] | Mortgages Payable [Member] | Southaven [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%		1.80%		1.80%
London Interbank Offered Rate (LIBOR) [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					0.95%
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		0.90%		0.875%	0.875%
Minimum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)					5.14%
Maximum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)					7.65%

Debt of the Operating Partner48

Debt of the Operating Partnership (Debt Maturities) (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Maturities of Debt [Line Items]
2,018	$ 2,404
2,019	3,369
2,020	3,566
2,021	609,793
2,022	4,436
Thereafter	1,167,114
Subtotal	1,790,682	$ 1,780,562
Net discount and debt origination costs	(18,627)
Total debt	$ 1,772,055	$ 1,763,651

Debt of the Operating Partner49

Debt of the Operating Partnership (Narrative) (Details) - USD ($)	Jan. 31, 2018	Dec. 31, 2017	Feb. 28, 2018	Jan. 31, 2018	Mar. 31, 2018
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%
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Principal		$ 1,780,562,000			$ 1,790,682,000
Tanger Properties Limited Partnership [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Net book value of collateral for mortgages payable					189,300,000
Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Southaven [Member]
Debt Instrument [Line Items]
Term of mortgage extension			2 years
Principal	$ 60,000,000	60,000,000	$ 51,400,000	$ 60,000,000	51,400,000
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
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					580,000,000
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized	1,200,000,000	1,000,000,000		$ 1,200,000,000	1,200,000,000
Letters of Credit					$ 6,000,000
Percentage of funds from operations allowed on a cumulative basis to pay dividends					95.00%
Term of mortgage extension				1 year
Principal		208,100,000			$ 227,600,000
Tanger Properties Limited Partnership [Member] | Debt [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit, Maximum borrowing capacity	600,000,000	520,000,000		$ 600,000,000	600,000,000
Debt Issuance Costs, Line of Credit Arrangements, Gross	$ 2,300,000			$ 2,300,000
Tanger Factory Outlet Centers, Inc. [Member] | Debt [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Maximum amount of unconsolidated joint venture debt guaranteed by the Company					32,700,000
Tanger Factory Outlet Centers, Inc. [Member] | Debt [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Maximum amount of unconsolidated joint venture debt guaranteed by the Company		$ 208,100,000			$ 227,600,000
London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Southaven [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%		1.80%		1.80%
London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		0.90%		0.875%	0.875%
Designated as Hedging Instrument [Member]
Debt Instrument [Line Items]
Notional Amount					$ 515,000,000
Designated as Hedging Instrument [Member] | Southaven [Member]
Debt Instrument [Line Items]
Company Fixed Pay Rate					2.47%
Notional Amount					$ 40,000,000

Derivative Financial Instrume50

Derivative Financial Instruments (Classifications on Consolidated Balance Sheets) (Details) - Designated as Hedging Instrument [Member] - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 515,000,000
Fair Value	8,084,000	$ 5,345,000
Interest Rate Swap One [Member]
Derivative [Line Items]
Notional Amount	$ 150,000,000
Company Fixed Pay Rate	1.30%
Fair Value	$ 369,000	326,000
Interest Rate Swap Two [Member]
Derivative [Line Items]
Notional Amount	$ 175,000,000
Company Fixed Pay Rate	1.03%
Fair Value	$ 6,636,000	5,207,000
Interest Rate Swap Three [Member]
Derivative [Line Items]
Notional Amount	$ 40,000,000
Company Fixed Pay Rate	2.47%
Fair Value	$ (32,000)	0
Interest Rate Swap Four [Member]
Derivative [Line Items]
Notional Amount	$ 150,000,000
Company Fixed Pay Rate	2.20%
Fair Value	$ 1,111,000	$ (188,000)
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap One [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Two [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Three [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Four [Member]
Derivative [Line Items]
Bank Pay Rate	1 month

Derivative Financial Instrume51

Derivative Financial Instruments (Gain (Loss) Recognized and Reclassified) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain recognized in OCI on derivative	$ 2,739	$ 722

Fair Value Measurements (Hierar

Fair Value Measurements (Hierarchy) (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	$ 8,116,000	$ 5,533,000
Total assets	8,116,000	5,533,000
Interest rate swaps (other liabilities)	32,000	188,000
Total liabilities	32,000	188,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	0	0
Total assets	0	0
Interest rate swaps (other liabilities)	0	0
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	8,116,000	5,533,000
Total assets	8,116,000	5,533,000
Interest rate swaps (other liabilities)	32,000	188,000
Total liabilities	32,000	188,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	0	0
Total assets	0	0
Interest rate swaps (other liabilities)	0	0
Total liabilities	$ 0	$ 0

Fair Value Measurements (Debt)

Fair Value Measurements (Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	$ 1,740,604	$ 1,775,540
Recorded value of debt	1,772,055	1,763,651
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	1,096,355	1,139,064
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	$ 644,249	$ 636,476

Share Repurchase Program (Detai

Share Repurchase Program (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	May 31, 2017
Stock Repurchase Program, Authorized Amount			$ 125,000,000
Shares repurchased and retired during period (in shares)	443,700	0
Stock Repurchased Average Price Per Share	$ 22.52
Stock repurchased during period exclusive of commissions and related fees	$ 10,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 65,700,000

Partners' Equity of the Opera55

Partners' Equity of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
General and Limited Partners' Capital Account, Units [Roll Forward]
General partner (in units)	1,000,000
Grant of restricted common shares awards, net of forfeitures (in units)	355,184	428,312
Issuance of deferred units (in units)	0	0
Repurchased of units (in units)	(443,700)	0
Units issued upon exercise of options (in units)	0	1,800
Units withheld for employee income taxes (in units)	(89,437)	(69,886)
General partner (in units)	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
Grant of restricted common shares awards, net of forfeitures (in units)	0	0
Repurchased of units (in units)	0
Units issued upon exercise of options (in units)		0
Units withheld for employee income taxes (in units)	0	0
General partner (in units)	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)	4,995,433	5,027,781
Grant of restricted common shares awards, net of forfeitures (in units)	0	0
Repurchased of units (in units)	0
Units issued upon exercise of options (in units)		0
Units withheld for employee income taxes (in units)	0	0
Limited partners (in units)	4,995,433	5,027,781
Class B Limited Partnership Units [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	93,560,536	95,095,891
Grant of restricted common shares awards, net of forfeitures (in units)	355,184	428,312
Repurchased of units (in units)	(443,700)
Units issued upon exercise of options (in units)		1,800
Units withheld for employee income taxes (in units)	(89,437)	(69,886)
Limited partners (in units)	93,382,583	95,456,117
Limited partners [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	98,555,969	100,123,672
Grant of restricted common shares awards, net of forfeitures (in units)	355,184	428,312
Repurchased of units (in units)	(443,700)
Units issued upon exercise of options (in units)		1,800
Units withheld for employee income taxes (in units)	(89,437)	(69,886)
Limited partners (in units)	98,378,016	100,483,898

Earnings Per Share of the Com56

Earnings Per Share of the Company (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income attributable to Tanger Factory Outlet Centers, Inc.	$ 22,838	$ 22,336
Less allocation of earnings to participating securities	(263)	(295)
Net income (loss) available to common shareholders/unitholders	$ 22,575	$ 22,041
Denominator:
Basic weighted average common shares (in shares)	93,644,000	95,245,000
Effect of outstanding options and restricted common shares (in shares)	0	66,000
Diluted weighted average common shares (in shares)	93,644,000	95,311,000
Basic earnings per common share/unit:
Net income, basic (in dollars per share)	$ 0.24	$ 0.23
Diluted earnings per common share:
Net income, diluted (in dollars per share)	$ 0.24	$ 0.23
Antidilutive incremental common shares attributable to notional units excluded from computation of earnings per share (in units)	1,013,383	871,116
Antidilutive securities excluded from computation of earnings per share (in shares)	564,200	177,700

Earnings Per Unit of the Oper57

Earnings Per Unit of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Components of Basic and Diluted Earnings Per Unit [Line Items]
Net income attributable to partners of the Operating Partnership	$ 24,055	$ 23,514
Numerator:
Less allocation of earnings to participating securities	(263)	(295)
Net income (loss) available to common shareholders/unitholders	$ 23,792	$ 23,219
Denominator:
Basic weighted average common shares (in shares)	98,640,000	100,273,000
Effect of outstanding options and restricted common shares (in shares)	0	66,000
Diluted weighted average common shares (in shares)	98,640,000	100,339,000
Basic earnings per common share/unit:
Net income, basic (in dollars per share)	$ 0.24	$ 0.23
Diluted earnings per common unit:
Net income, diluted (in dollars per share)	$ 0.24	$ 0.23
Antidilutive incremental common shares attributable to notional units excluded from computation of earnings per share (in units)	1,013,383	871,116
Antidilutive securities excluded from computation of earnings per share (in shares)	564,200	177,700

Equity-Based Compensation of 58

Equity-Based Compensation of the Company (Equity-Based Compensation Expense) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 3,392	$ 3,292
Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	2,376	2,349
Notional unit performance awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	937	882
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 79	$ 61

Equity-Based Compensation of 59

Equity-Based Compensation of the Company (Equity-Based Compensation Expense Capitalized) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Tanger Factory Outlet Centers, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense capitalized	$ 264	$ 246

Equity-Based Compensation of 60

Equity-Based Compensation of the Company (Outperformance Plan) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - 2018 OPP [Member]	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Maximum number of restricted common shares that may be earned | shares	409,972
Granted (in dollars per share) | $ / shares	$ 12.42
Absolute portion of award [Member]
Percent of total award	33.30%
Relative portion of award [Member]
Percent of total award	66.70%
Minimum [Member] | Absolute portion of award [Member]
Absolute total shareholder return	19.10%
Percentage of units to be earned	20.00%
Minimum [Member] | Relative portion of award [Member]
Percentage of units to be earned	20.00%
Threshold Percentage for Performance Target	30.00%
Maximum [Member] | Absolute portion of award [Member]
Absolute total shareholder return	29.50%
Percentage of units to be earned	100.00%
Maximum [Member] | Relative portion of award [Member]
Percentage of units to be earned	100.00%
Threshold Percentage for Performance Target	80.00%

Equity-Based Compensation of 61

Equity-Based Compensation of the Company (Outperformance Plan Assumptions) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - 2018 OPP [Member]	3 Months Ended
	Mar. 31, 2018
Risk Free Interest Rate	2.40%
Expected Dividend Rate	4.80%
Expected Volatility Rate	27.00%

Equity-Based Compensation of 62

Equity-Based Compensation of the Company (Narrative) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Feb. 28, 2018	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares paid for tax withholding for share based compensation (in shares)		89,437	69,886
Payments Related to Tax Withholding for Share-based Compensation		$ 2,068	$ 2,435
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units, granted (in shares/units)	331,000
Exercise price	$ 21.94
Options expiration period	10 years
Vesting percentage	20.00%
Vesting period	5 years
Vesting period commencement	1 year
Grant date fair value	$ 3.62
Expected Dividend Rate	6.24%
Expected life	7 years 1 month 7 days
Expected Volatility Rate	32.47%
Risk Free Interest Rate	2.80%
Forfeiture Rate Used, Minimum	3.00%
Forfeiture Rate Used, Maximum	10.00%
Restricted Common Share Award Plan [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units, granted (in shares/units)	407,156
Lower limit, grant date fair value (in dollars per share)	$ 18.65
Upper limit, grant date fair value (in dollars per share)	$ 21.94
Restricted Common Share Award Plan [Member] | Director [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Common Share Award Plan [Member] | Chief Executive Officer [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement award holding period	3 years
Restricted Common Share Award Plan [Member] | Minimum [Member] | Executive Officers [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Common Share Award Plan [Member] | Maximum [Member] | Executive Officers [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
2018 OPP [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Dividend Rate		4.80%
Expected Volatility Rate		27.00%
Risk Free Interest Rate		2.40%
Share-based Award Measurement Period	3 years
2018 OPP [Member] | Vesting immediately [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2018 OPP [Member] | Vesting one year thereafter [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2018 OPP [Member] | Chief Executive Officer [Member] | Vesting immediately [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2018 OPP [Member] | Chief Executive Officer [Member] | Vesting one year thereafter [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%

Accumulated Other Comprehensi63

Accumulated Other Comprehensive Income (Loss) of the Company (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 612,302	$ 705,441
Ending Balance	593,491	698,003
Interest rate swap gain (loss) to be reclassified within twelve months	1,300
Foreign Currency Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(24,360)	(32,087)
Other comprehensive income (loss) before reclassifications	(2,938)	959
Reclassification out of accumulated other comprehensive income into interest expense	0	0
Ending Balance	(27,298)	(31,128)
Cash flow hedges Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	5,075	3,792
Other comprehensive income (loss) before reclassifications	2,914	411
Reclassification out of accumulated other comprehensive income into interest expense	(314)	293
Ending Balance	7,675	4,496
Total Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(19,285)	(28,295)
Other comprehensive income (loss) before reclassifications	(24)	1,370
Reclassification out of accumulated other comprehensive income into interest expense	(314)	293
Ending Balance	(19,623)	(26,632)
Foreign Currency noncontrolling interest [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,329)	(1,740)
Other comprehensive income (loss) before reclassifications	(157)	51
Reclassification out of accumulated other comprehensive income into interest expense	0	0
Ending Balance	(1,486)	(1,689)
Cash Flow Hedges noncontrolling interest [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	269	201
Other comprehensive income (loss) before reclassifications	156	3
Reclassification out of accumulated other comprehensive income into interest expense	(17)	15
Ending Balance	408	219
Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,060)	(1,539)
Other comprehensive income (loss) before reclassifications	(1)	54
Reclassification out of accumulated other comprehensive income into interest expense	(17)	15
Ending Balance	$ (1,078)	$ (1,470)

Accumulated Other Comprehensi64

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 612,302
Ending Balance	593,491
Interest rate swap gain (loss) to be reclassified within twelve months	1,300
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(25,689)	$ (33,827)
Other comprehensive income (loss) before reclassifications	(3,095)	1,010
Ending Balance	(28,784)	(32,817)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	5,344	3,993
Other comprehensive income (loss) before reclassifications	3,070	414
Reclassification out of accumulated other comprehensive income into interest expense	(331)	308
Ending Balance	8,083	4,715
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(20,345)	(29,834)
Other comprehensive income (loss) before reclassifications	(25)	1,424
Reclassification out of accumulated other comprehensive income into interest expense	(331)	308
Ending Balance	$ (20,701)	$ (28,102)

Supplemental Cash Flow Inform65

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Supplemental Cash Flow Information [Abstract]
Costs relating to construction included in accounts payable and accrued expenses	$ 18,978	$ 26,923
Interest Paid, Net	$ 15,903	$ 9,445

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares	1 Months Ended	3 Months Ended
	Apr. 30, 2018	Mar. 31, 2018	Mar. 31, 2017
Tanger Factory Outlet Centers, Inc. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividends declared per commons share (in dollars per share)	$ 0.35
Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Distribution declared per common unit (in dollars per share)		$ 0.3425	$ 0.325
Tanger Properties Limited Partnership [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Distribution declared per common unit (in dollars per share)	$ 0.35