Tanger (SKT) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Entity Information [Line Items]
Entity Registrant Name	TANGER FACTORY OUTLET CENTERS, INC
Entity Central Index Key	0000899715
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Document Transition Report	false
Entity File Number	1-11986
Entity Incorporation, State or Country Code	NC
Entity Tax Identification Number	56-1815473
Entity Address, Address Line One	3200 Northline Avenue
Entity Address, Address Line Two	Suite 360
Entity Address, City or Town	Greensboro
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27408
City Area Code	336
Local Phone Number	292-3010
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Shares, $0.01 par value
Trading Symbol	SKT
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		100,804,077
Tanger Properties Limited Partnership [Member]
Entity Information [Line Items]
Entity Registrant Name	TANGER PROPERTIES LIMITED PARTNERSHIP
Entity Central Index Key	0001004036
Entity File Number	333-3526-01
Entity Incorporation, State or Country Code	NC
Entity Tax Identification Number	56-1822494
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Rental property:
Land	$ 265,714	$ 265,968
Buildings, improvements and fixtures	2,519,214	2,527,404
Rental property, at cost, total	2,784,928	2,793,372
Accumulated depreciation	(1,078,999)	(1,054,993)
Total rental property, net	1,705,929	1,738,379
Cash and cash equivalents	201,721	84,832
Investments in unconsolidated joint ventures	89,482	94,579
Deferred lease costs and other intangibles, net	81,807	84,960
Operating lease right-of-use assets	81,222	81,499
Prepaids and other assets	99,260	105,282
Total assets	2,259,421	2,189,531
Debt:
Senior, unsecured notes, net	1,141,074	1,140,576
Unsecured term loan, net	322,753	347,370
Mortgages payable, net	78,933	79,940
Unsecured lines of credit	0	0
Total debt	1,542,760	1,567,886
Accounts payable and accrued expenses	68,084	88,253
Operating lease liabilities	89,870	90,105
Other liabilities	75,693	84,404
Total liabilities	1,776,407	1,830,648
Commitments and contingencies
Tanger Factory Outlet Centers, Inc.:
Common shares, $0.01 par value, 300,000,000 shares authorized, 100,794,577 and 93,569,801 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	1,008	936
Paid in capital	913,236	787,143
Accumulated distributions in excess of net income	(432,895)	(420,104)
Partners’ Equity:
Accumulated other comprehensive loss	(20,268)	(26,585)
Equity attributable to Tanger Factory Outlet Centers, Inc.	461,081	341,390
Noncontrolling interests in Operating Partnership	21,933	17,493
Noncontrolling interests in other consolidated partnerships	0	0
Total equity	483,014	358,883
Total liabilities and equity	2,259,421	2,189,531
Tanger Properties Limited Partnership [Member]
Rental property:
Land	265,714	265,968
Buildings, improvements and fixtures	2,519,214	2,527,404
Rental property, at cost, total	2,784,928	2,793,372
Accumulated depreciation	(1,078,999)	(1,054,993)
Total rental property, net	1,705,929	1,738,379
Cash and cash equivalents	201,564	84,750
Investments in unconsolidated joint ventures	89,482	94,579
Deferred lease costs and other intangibles, net	81,807	84,960
Operating lease right-of-use assets	81,222	81,499
Prepaids and other assets	98,891	104,800
Total assets	2,258,895	2,188,967
Debt:
Senior, unsecured notes, net	1,141,074	1,140,576
Unsecured term loan, net	322,753	347,370
Mortgages payable, net	78,933	79,940
Unsecured lines of credit	0	0
Total debt	1,542,760	1,567,886
Accounts payable and accrued expenses	67,558	87,689
Operating lease liabilities	89,870	90,105
Other liabilities	75,693	84,404
Total liabilities	1,775,881	1,830,084
Commitments and contingencies
Partners’ Equity:
General partner, 1,100,000 units outstanding at March 31, 2021 and 1,000,000 at December 31, 2020, respectively	5,077	3,334
Limited partners, 4,794,643 and 4,794,643 Class A common units, and 99,694,577 and 92,569,801 Class B common units outstanding at March 31, 2021 and December 31, 2020, respectively	499,339	383,588
Accumulated other comprehensive loss	(21,402)	(28,039)
Total partners’ equity	483,014	358,883
Noncontrolling interests in other consolidated partnerships	0	0
Total equity	483,014	358,883
Total liabilities and equity	$ 2,258,895	$ 2,188,967

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2021	Dec. 31, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	300,000,000	300,000,000
Common Stock, Shares, Issued	100,794,577	93,569,801
Common Stock, Shares, Outstanding	100,794,577	93,569,801
Tanger Properties Limited Partnership [Member]
General partner units, outstanding (in units)	1,100,000	1,000,000
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member]
Limited partners units, outstanding (in units)	4,794,643	4,794,643
Tanger Properties Limited Partnership [Member] | Class B Limited Partnership Units [Member]
Limited partners units, outstanding (in units)	99,694,577	92,569,801

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Rental revenues	$ 97,467	$ 108,558
Management, leasing and other services	1,372	1,443
Tanger Factory Outlet Centers, Inc. [Member]
Revenues:
Rental revenues	97,467	108,558
Management, leasing and other services	1,372	1,443
Other revenues	1,855	1,632
Total revenues	100,694	111,633
Expenses:
Property operating	35,311	38,627
General and administrative	16,793	12,584
Impairment charge	0	45,675
Depreciation and amortization	28,150	29,417
Total expenses	80,254	126,303
Other income (expense):
Interest expense	(14,362)	(15,196)
Other income (expense)	(3,505)	220
Total other income (expense)	(17,867)	(14,976)
Income (loss) before equity in earnings of unconsolidated joint ventures	2,573	(29,646)
Equity in earnings of unconsolidated joint ventures	1,769	1,527
Net income (loss)	4,342	(28,119)
Noncontrolling interests in Operating Partnership	(209)	1,427
Noncontrolling interests in other consolidated partnerships	0	(190)
Net income (loss) attributable to Tanger Factory Outlet Centers, Inc.	$ 4,133	$ (26,882)
Basic earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.04	$ (0.30)
Diluted earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.04	$ (0.30)
Tanger Properties Limited Partnership [Member]
Revenues:
Rental revenues	$ 97,467	$ 108,558
Management, leasing and other services	1,372	1,443
Other revenues	1,855	1,632
Total revenues	100,694	111,633
Expenses:
Property operating	35,311	38,627
General and administrative	16,793	12,584
Impairment charge	0	45,675
Depreciation and amortization	28,150	29,417
Total expenses	80,254	126,303
Other income (expense):
Interest expense	(14,362)	(15,196)
Other income (expense)	(3,505)	220
Total other income (expense)	(17,867)	(14,976)
Income (loss) before equity in earnings of unconsolidated joint ventures	2,573	(29,646)
Equity in earnings of unconsolidated joint ventures	1,769	1,527
Net income (loss)	4,342	(28,119)
Noncontrolling interests in consolidated partnerships	0	(190)
Net income (loss) attributable to Tanger Factory Outlet Centers, Inc.	4,342	(28,309)
Net income (loss) available to limited partners	4,295	(28,020)
Net income (loss) available to general partner	$ 47	$ (289)
Basic earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.04	$ (0.30)
Diluted earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.04	$ (0.30)

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Net income (loss)	$ 4,342	$ (28,119)
Other comprehensive income (loss):
Foreign currency translation adjustments	4,639	(7,733)
Change in fair value of cash flow hedges	1,998	(5,676)
Other comprehensive income (loss)	6,637	(13,409)
Comprehensive income (loss)	10,979	(41,528)
Comprehensive (income) loss attributable to noncontrolling interests	(529)	1,913
Comprehensive income (loss) attributable to Tanger Factory Outlet Centers, Inc./Operating Partnership	10,450	(39,615)
Tanger Properties Limited Partnership [Member]
Net income (loss)	4,342	(28,119)
Other comprehensive income (loss):
Foreign currency translation adjustments	4,639	(7,733)
Change in fair value of cash flow hedges	1,998	(5,676)
Other comprehensive income (loss)	6,637	(13,409)
Comprehensive income (loss)	10,979	(41,528)
Comprehensive (income) loss attributable to noncontrolling interests	0	(190)
Comprehensive income (loss) attributable to Tanger Factory Outlet Centers, Inc./Operating Partnership	$ 10,979	$ (41,718)

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	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, 2019		$ 456,109	$ 929	$ 775,035	$ (317,263)	$ (25,495)	$ 433,206	$ 22,903	$ 0
Beginning Balance at Dec. 31, 2019											$ (26,888)	$ 456,109	$ 0	$ 4,435	$ 478,562
Balance, partners' capital, including portion attributable to noncontrolling interest at Dec. 31, 2019										$ 456,109
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(28,119)			(26,882)		(26,882)	(1,427)	190	(28,119)		(28,309)	190	(289)	(28,020)
Other comprehensive income (loss)		(13,409)				(12,733)	(12,733)	(676)		(13,409)	(13,409)	(13,409)
Compensation under Incentive Award Plan		3,889		3,889			3,889			3,889		3,889			3,889
Grant of restricted common share awards, net of forfeitures			2	(2)
Withholding of common shares/units for employee income taxes		(736)		(736)			(736)			(736)		(736)			(736)
Contributions from noncontrolling interests		72							72	72			72
Adjustment for noncontrolling interests in Operating Partnership				(124)			(124)	124
Common distributions declared										(69,886)		(69,886)		(713)	(69,173)
Common dividends declared		(66,387)			(66,387)		(66,387)
Distributions to noncontrolling interests		(3,761)						(3,499)	(262)	(262)			(262)
Ending Balance at Mar. 31, 2020		347,658	931	778,062	(410,532)	(38,228)	330,233	17,425	0
Ending Balance at Mar. 31, 2020											(40,297)	347,658	0	3,433	384,522
Balance, partners' capital, including portion attributable to noncontrolling interest at Mar. 31, 2020										347,658
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares (in shares/units)	0
Beginning Balance at Dec. 31, 2020		358,883	936	787,143	(420,104)	(26,585)	341,390	17,493	0
Beginning Balance at Dec. 31, 2020										358,883	(28,039)	358,883	0	3,334	383,588
Balance, partners' capital, including portion attributable to noncontrolling interest at Dec. 31, 2020										358,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		4,342			4,133		4,133	209		4,342		4,342		47	4,295
Other comprehensive income (loss)		6,637				6,317	6,317	320		6,637	6,637	6,637
Compensation under Incentive Award Plan		3,909		3,909			3,909			3,909		3,909			3,909
Grant of restricted common share awards, net of forfeitures			5	(5)
Issuance of common shares/units		128,655	68	128,587			128,655			128,655		128,655		1,874	126,781
Withholding of common shares/units for employee income taxes		(1,637)	(1)	(1,636)			(1,637)			(1,637)		(1,637)			(1,637)
Contributions from noncontrolling interests		0							0	0			0
Adjustment for noncontrolling interests in Operating Partnership				(4,762)			(4,762)	4,762
Common distributions declared										(17,775)		(17,775)		(178)	(17,597)
Common dividends declared		(16,924)			(16,924)		(16,924)
Distributions to noncontrolling interests		(851)						(851)
Ending Balance at Mar. 31, 2021		$ 483,014	$ 1,008	$ 913,236	$ (432,895)	$ (20,268)	$ 461,081	$ 21,933	$ 0
Ending Balance at Mar. 31, 2021										483,014	$ (21,402)	$ 483,014	$ 0	$ 5,077	$ 499,339
Balance, partners' capital, including portion attributable to noncontrolling interest at Mar. 31, 2021										$ 483,014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares (in shares/units)	6,867,078	6,867,078												100,000	6,767,078

CONSOLIDATED STATEMENT OF SHA_2

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	1 Months Ended		3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Issuance of shares (in shares/units)			6,867,078	0
Tanger Factory Outlet Centers, Inc. [Member]
Grant of restricted common shares awards, net of forfeitures (in units)			469,675	241,038
Issuance of shares (in shares/units)			6,867,078
Shares paid for tax withholding for share based compensation (in shares)			111,977	56,597
Common dividends paid per common share (in dollars per share)	$ 0.1775	$ 0.355
Common dividends per common share (in dollars per share)		0.3575	$ 0.1775	$ 0.7125
Tanger Properties Limited Partnership [Member]
Grant of restricted common shares awards, net of forfeitures (in units)			469,675	241,038
Shares paid for tax withholding for share based compensation (in shares)			111,977	56,597
Common distributions (in dollars per share)	$ 0.1775	0.355	$ 0.1775	$ 0.7125
Cash dividend declared (in dollars per unit)		$ 0.3575

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
FINANCING ACTIVITIES
Proceeds from common share offering	$ 128,655	$ 0
Tanger Factory Outlet Centers, Inc. [Member]
OPERATING ACTIVITIES
Net income (loss)	4,342	(28,119)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,150	29,417
Impairment charge	0	45,675
Amortization of deferred financing costs	1,173	757
Equity in earnings of unconsolidated joint ventures	(1,769)	(1,527)
Equity-based compensation expense	3,845	3,789
Amortization of debt (premiums) and discounts, net	127	118
Amortization (accretion) of market rent rate adjustments, net	(213)	362
Straight-line rent adjustments	1,043	(1,872)
Distributions of cumulative earnings from unconsolidated joint ventures	890	1,517
Other non-cash	3,638	0
Changes in other assets and liabilities:
Other assets	2,981	2,210
Accounts payable and accrued expenses	(12,931)	(25,045)
Net cash provided by operating activities	31,276	27,282
INVESTING ACTIVITIES
Additions to rental property	(7,357)	(10,551)
Additions to investments in unconsolidated joint ventures	(7,000)	(261)
Net proceeds from sale of assets	8,129	0
Additions to non-real estate assets	(414)	(677)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	7,631	3,488
Additions to deferred lease costs	(3,668)	(1,220)
Other investing activities	5,396	2,844
Net cash provided by (used in) investing activities	2,717	(6,377)
FINANCING ACTIVITIES
Cash dividends paid	(16,924)	(33,034)
Distributions to noncontrolling interests in Operating Partnership	(851)	(1,744)
Proceeds from revolving credit facility	0	634,030
Repayments of revolving credit facility	0	(34,200)
Repayments of notes, mortgages and loans	(25,924)	(873)
Employee income taxes paid related to shares withheld upon vesting of equity awards	(1,637)	(736)
Additions to deferred financing costs	(76)	(65)
Proceeds from common share offering	128,655	0
Proceeds from other financing activities	0	72
Payment for other financing activities	(287)	(549)
Net cash provided by financing activities	82,956	562,901
Effect of foreign currency rate changes on cash and cash equivalents	(60)	(24)
Net increase in cash and cash equivalents	116,889	583,782
Cash and cash equivalents, beginning of period	84,832	16,672
Cash and cash equivalents, end of period	201,721	600,454
Tanger Properties Limited Partnership [Member]
OPERATING ACTIVITIES
Net income (loss)	4,342	(28,119)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,150	29,417
Impairment charge	0	45,675
Amortization of deferred financing costs	1,173	757
Equity in earnings of unconsolidated joint ventures	(1,769)	(1,527)
Equity-based compensation expense	3,845	3,789
Amortization of debt (premiums) and discounts, net	127	118
Amortization (accretion) of market rent rate adjustments, net	(213)	362
Straight-line rent adjustments	1,043	(1,872)
Distributions of cumulative earnings from unconsolidated joint ventures	890	1,517
Other non-cash	3,638	0
Changes in other assets and liabilities:
Other assets	2,868	2,552
Accounts payable and accrued expenses	(12,893)	(25,329)
Net cash provided by operating activities	31,201	27,340
INVESTING ACTIVITIES
Additions to rental property	(7,357)	(10,551)
Additions to investments in unconsolidated joint ventures	(7,000)	(261)
Net proceeds from sale of assets	8,129	0
Additions to non-real estate assets	(414)	(677)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	7,631	3,488
Additions to deferred lease costs	(3,668)	(1,220)
Other investing activities	5,396	2,844
Net cash provided by (used in) investing activities	2,717	(6,377)
FINANCING ACTIVITIES
Cash dividends paid	(17,775)	(34,778)
Proceeds from revolving credit facility	0	634,030
Repayments of revolving credit facility	0	(34,200)
Repayments of notes, mortgages and loans	(25,924)	(873)
Employee income taxes paid related to shares withheld upon vesting of equity awards	(1,637)	(736)
Additions to deferred financing costs	(76)	(65)
Proceeds from common share offering	128,655	0
Proceeds from other financing activities	0	72
Payment for other financing activities	(287)	(549)
Net cash provided by financing activities	82,956	562,901
Effect of foreign currency rate changes on cash and cash equivalents	(60)	(24)
Net increase in cash and cash equivalents	116,814	583,840
Cash and cash equivalents, beginning of period	84,750	16,519
Cash and cash equivalents, end of period	$ 201,564	$ 600,359

Business

Business	3 Months Ended
	Mar. 31, 2021
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, 2021, we owned and operated 30 consolidated outlet centers, with a total gross leasable area of approximately 11.5 million square feet. We also had partial ownership interests in 6 unconsolidated outlet centers totaling approximately 2.1 million square feet, including 2 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.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies 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, 2020. The December 31, 2020 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 control such properties. 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 on 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 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, Columbus, Galveston/Houston, and National Harbor 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. Accounts Receivable The current novel COVID-19 pandemic (“COVID-19”) has had, and will continue to have, repercussions across local, national and global economies and financial markets. COVID-19 has impacted all states where our tenants operate their businesses or where our properties are located and measures taken to prevent or remediate COVID-19, including “shelter-in place” or “stay-at-home” orders or other quarantine mandates issued by local, state or federal authorities, have had an adverse effect on our business and the businesses of our tenants. The full extent of the adverse impact on, among other things, our results of operations, liquidity (including our ability to access capital markets), the possibility of future impairments of long-lived assets or our investments in unconsolidated joint ventures, our compliance with debt covenants, our ability to collect rent under our existing leases, our ability to renew and re - lease our leased space, the outlook for the retail environment, bankruptcies and potential further bankruptcies or other store closings and our ability to develop, acquire, dispose or lease properties for our portfolio, is unknown and will depend on future developments, which are highly uncertain and cannot be predicted. Our results of operations, liquidity and cash flows have been and may continue to be in the future materially affected. Due to the COVID-19 pandemic, a number of our tenants requested rent deferrals, rent abatements or other types of rent relief during this pandemic. As a response, in late March 2020, we offered all tenants in our consolidated portfolio the option to defer 100% of April and May rents interest free, payable in equal installments due in January and February of 2021. Historically, our accounts receivable from tenants has not been material; however, given the impacts from the COVID-19 pandemic discussed above, our net accounts receivable balance, which is recorded in prepaids and other assets on the consolidated balance sheet, had increased to approximately $18.8 million at December 31, 2020, but decreased to approximately $12.8 million at March 31, 2021, primarily due to deferred rent collections. Straight-line rent adjustments recorded as a receivable in prepaids and other assets on the consolidated balance sheets was approximately $54.4 million as of March 31, 2021. Individual leases are assessed for collectability and upon the determination that the collection of rents is not probable, accrued rent and accounts receivable are written-off as an adjustment to rental revenue. Revenue from leases where collection is deemed to be less than probable is recorded on a cash basis until collectability is determined to be probable. Further we assess whether operating lease receivables, at a portfolio level, are appropriately valued based upon an analysis of balances outstanding, historical bad debt levels and current economic trends including discussions with tenants for potential lease amendments. Our estimate of the collectability of accrued rents and accounts receivable is based on the best information available to us at the time of preparing the financial statements. The duration of the COVID-19 pandemic, recent tenant bankruptcies and other significant uncertainties with the economy required significant judgment to be used when estimating the collection of rents through March 31, 2021. As a result of the actual collections of 2020 deferred rents due to be repaid during the first quarter of 2021, the Company recorded a $1.6 million reversal of rental revenue reserves during the first quarter of 2021 related to prior period rents that were previously deferred. As of March 31, 2021, remaining rental revenue reserves totaled $2.6 million, or 39% of the total remaining 2020 rents deferred or under negotiation. Based on rents received through April 30, 2021, collections of contractual fixed rents billed of $85.6 million in the first quarter of 2021 for the consolidated portfolio were approximately 95%. Impairment of Long-Lived Assets Rental property held and used by us is reviewed for impairment in the event that facts and circumstances indicate that the carrying amount of an asset may not be recoverable. In such an event, we compare the estimated future undiscounted cash flows associated with the asset to the asset's carrying amount, and if less, recognize an impairment loss in an amount by which the carrying amount exceeds its fair value. During the first quarter and fourth quarter of 2020, we recorded $45.7 million and $19.2 million in impairment charges, respectively, related to our Foxwoods outlet center in our consolidated statement of operations which equaled the excess of the carrying value over its estimated fair value. If the effects of the COVID-19 pandemic cause economic and market conditions to deteriorate beyond our current expectations or if our expected holding periods for assets change, subsequent tests for impairment could result in additional impairment charges in the future. We can provide no assurance that material impairment charges with respect to our properties will not occur during 2021 or future periods.

Disposition of Properties

Disposition of Properties	3 Months Ended
	Mar. 31, 2021
Disposition of Properties [Abstract]
Disposition of Properties	Disposition of Properties Disposition of Properties During the three months ended March 31, 2021, we closed on the sale of a non-core outlet center in Jeffersonville, Ohio. The following table sets forth certain summarized information regarding properties sold during the three months ended March 31, 2021: Property (1) Location Date Sold Square Feet Net Sales Proceeds Gain on Sale 2021 Disposition: Jeffersonville Jeffersonville, Ohio January 2021 412 $ 8,100 — (1) The rental properties sold did not meet the criteria to be reported as discontinued operations.

Investments in Unconsolidated R

Investments in Unconsolidated Real Estate Joint Ventures	3 Months Ended
	Mar. 31, 2021
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, 2021 Joint Venture Outlet Center Location Ownership % Square Feet Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (in millions) (1) Investments included in investments in unconsolidated joint ventures: Columbus Columbus, OH 50.0 % 355 $ 1.6 $ 70.8 RioCan Canada Various 50.0 % 665 87.9 — $ 89.5 Investments included in other liabilities: Charlotte (2) Charlotte, NC 50.0 % 399 $ (12.4) $ 99.6 National Harbor (2) National Harbor, MD 50.0 % 341 (9.8) 94.5 Galveston/Houston (2) Texas City, TX 50.0 % 353 (12.2) 64.3 $ (34.4) As of December 31, 2020 Joint Venture Outlet Center Location Ownership % Square Feet Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (in millions) (1) Investments included in investments in unconsolidated joint ventures: Columbus Columbus, OH 50.0 % 355 $ 2.0 $ 70.8 RioCan Canada Various 50.0 % 765 92.6 $ — $ 94.6 Investments included in other liabilities: Charlotte (2) Charlotte, NC 50.0 % 399 (12.8) 99.6 National Harbor (2) National Harbor, MD 50.0 % 341 (8.4) 94.5 Galveston/Houston (2) Texas City, TX 50.0 % 353 (19.5) 80.0 $ (40.7) (1) Net of debt origination costs of $1.3 million as of March 31, 2021 and $1.1 million as of December 31, 2020. (2) The negative carrying value is due to distributions exceeding contributions and increases or decreases from our 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, 2021 2020 Fee: Management and marketing $ 509 $ 541 Leasing and other fees 56 20 Expense reimbursements from unconsolidated joint ventures 807 882 Total Fees $ 1,372 $ 1,443 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 $3.4 million and $3.6 million as of March 31, 2021 and December 31, 2020, respectively) are amortized over the various useful lives of the related assets. Galveston/Houston In February 2021, the Galveston/Houston joint venture amended its mortgage loan to extend the maturity to July 2023, which required a reduction in principal balance from $80.0 million to $64.5 million. The amendment also changed the interest rate from LIBOR + 1.65% to LIBOR + 1.85%. We are providing property management, marketing and leasing services to the outlet center. RioCan Canada In March 2021, the RioCan joint venture closed on the sale of its outlet center in Saint-Sauveur, for net proceeds of approximately $9.4 million. Our share of the proceeds was approximately $4.7 million. As a result of this transaction, we recorded a loss on the sale of $3.7 million. This includes a $3.6 million charge related to the foreign currency effect of the sale recorded in other income (expense), which had been previously recorded in other comprehensive income. 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, 2021 December 31, 2020 Assets Land $ 83,486 $ 86,861 Buildings, improvements and fixtures 467,316 471,798 Construction in progress 3,059 2,976 553,861 561,635 Accumulated depreciation (151,140) (145,810) Total rental property, net 402,721 415,825 Cash and cash equivalents 20,459 21,471 Deferred lease costs and other intangibles, net 4,475 4,849 Prepaids and other assets 18,567 20,478 Total assets $ 446,222 $ 462,623 Liabilities and Owners’ Equity Mortgages payable, net $ 329,249 $ 344,856 Accounts payable and other liabilities 14,188 17,427 Total liabilities 343,437 362,283 Owners’ equity 102,785 100,340 Total liabilities and owners’ equity $ 446,222 $ 462,623 Three months ended Condensed Combined Statements of Operations March 31, - Unconsolidated Joint Ventures 2021 2020 Revenues $ 20,992 $ 22,036 Expenses: Property operating 8,413 9,129 General and administrative 29 139 Depreciation and amortization 5,901 5,906 Total expenses 14,343 15,174 Other income (expense): Interest expense (2,945) (3,735) Gain on sale of assets 503 — Other income 59 56 Total other expense $ (2,383) $ (3,679) Net income $ 4,266 $ 3,183 The Company and Operating Partnership’s share of: Net income $ 1,769 $ 1,527 Depreciation and amortization (real estate related) $ 2,996 $ 3,018

Debt Guaranteed by the Company

Debt Guaranteed by the Company	3 Months Ended
	Mar. 31, 2021
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, 2021 December 31, 2020 Unsecured lines of credit $ — $ — Unsecured term loan $ 325,000 $ 350,000

Debt of the Operating Partnersh

Debt of the Operating Partnership	3 Months Ended
	Mar. 31, 2021
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, 2021 December 31, 2020 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 $ 248,136 $ 250,000 $ 247,967 Senior notes 3.750 % December 2024 250,000 248,585 250,000 248,493 Senior notes 3.125 % September 2026 350,000 346,909 350,000 346,770 Senior notes 3.875 % July 2027 300,000 297,444 300,000 297,346 Mortgages payable: Atlantic City (2)(3) 5.14 % - 7.65% November 2021- December 2026 26,420 27,547 27,343 28,569 Southaven (4) LIBOR + 1.80% April 2021 51,400 51,386 51,400 51,371 Unsecured term loan LIBOR (5) + 1.00% April 2024 325,000 322,753 350,000 347,370 Unsecured lines of credit LIBOR (5) + 1.00% October 2021 (6) — — — — $ 1,552,820 $ 1,542,760 $ 1,578,743 $ 1,567,886 (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. (4) In April 2021 we extended the maturity date 90 days to explore other financing options however, we may extend the loan using our two-year extension option to April 2023, which could require reductions in principal or additional guarantees to comply with extension requirements. (5) Beginning in June 2020, if LIBOR is less than 0.25% per annum, the rate will be deemed to be 0.25% for the portions of the lines of credit and bank term loan that are not fixed with an interest rate swap. (6) Unsecured lines of credit have a one-year extension option to extend maturity to October 2022. Certain of our properties, which had a net book value of approximately $161.7 million at March 31, 2021, 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. 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, 2021, the maximum amount of unconsolidated joint venture debt guaranteed by the Company was $21.9 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, 2021, we believe we were in compliance with all of our debt covenants. Unsecured term loan In March 2021, we paid down $25.0 million of borrowings under our $350.0 million unsecured term loan with cash on hand. Debt Maturities Maturities of the existing long-term debt as of March 31, 2021 for the next five years and thereafter are as follows (in thousands): Calendar Year Amount For the remainder of 2021 $ 56,270 2022 4,436 2023 254,768 2024 580,140 2025 1,501 Thereafter 655,705 Subtotal 1,552,820 Net discount and debt origination costs (10,060) Total $ 1,542,760 Given the financial implications of the COVID-19 pandemic, we have considered our short-term (one year or less from the date of filing these financial statements) liquidity needs and the adequacy of our estimated cash flows from operating activities and other financing sources to meet these needs. These other sources include but are not limited to: existing cash, ongoing relationships with certain financial institutions, our ability to sell debt or issue equity subject to market conditions and proceeds from the potential sale of non-core assets. We believe that we have access to the necessary financing to fund our short-term liquidity needs.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2021
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, 2021 December 31, 2020 Assets (Liabilities) (1) : Interest rate swaps: April 13, 2016 January 1, 2021 175,000 1 month LIBOR 1.03 % $ — $ (17) March 1, 2018 January 31, 2021 40,000 1 month LIBOR 2.47 % — (75) August 14, 2018 January 1, 2021 150,000 1 month LIBOR 2.20 % — (34) July 1, 2019 February 1, 2024 25,000 1 month LIBOR 1.75 % (956) (1,192) January 1, 2021 February 1, 2024 150,000 1 month LIBOR 0.60 % (936) (1,901) January 1, 2021 February 1, 2024 100,000 1 month LIBOR 0.22 % 434 (139) March 1, 2021 February 1, 2024 25,000 1 month LIBOR 0.24 % 99 — Total $ (1,359) $ (3,358) (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. 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 following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements (in thousands): Three months ended March 31, 2021 2020 Interest Rate Swaps: Amount of gain (loss) recognized in other comprehensive income (loss) $ 1,998 $ (5,676)

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
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 Fair Value Measurements on a 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, 2021: Assets: Short-term government securities ( cash and cash equivalents) $ 194,518 $ 194,518 $ — $ — Interest rate swaps (prepaids and other assets) 533 — 533 — Total assets $ 195,051 $ 194,518 $ 533 $ — Liabilities: Interest rate swaps (other liabilities) $ 1,893 $ — $ 1,893 $ — Total liabilities $ 1,893 $ — $ 1,893 $ — 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, 2020: Asset: Short-term government securities ( cash and cash equivalents) $ 87,081 $ 87,081 $ — $ — Total assets $ 87,081 $ 87,081 $ — $ — Liabilities: Interest rate swaps (other liabilities) $ 3,358 $ — $ 3,358 $ — Total liabilities $ 3,358 $ — $ 3,358 $ — Short-term government securities Short-term government securities are highly liquid investments, which are classified as Level 1 in the fair value hierarchy because they are valued using quoted market prices in an active market. Interest rate swaps Fair values of interest rate swaps are estimated 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. Fair Value Measurements on a Nonrecurring Basis The following table sets forth our assets that are measured at fair value on a nonrecurring basis 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 31,2020: Asset: Long-lived assets $ 60,000 $ — $ — $ 60,000 During the first quarter 2020, we recorded a $45.7 million impairment charge in our consolidated statement of operations which equaled the excess of the carrying value of our Foxwoods outlet center over its estimated fair value. In the fourth quarter of 2020, we recorded an additional impairment of $19.2 million. The estimated fair value was based on the income approach. The income approach involves discounting the estimated income stream and reversion (presumed sale) value of a property over an estimated holding period to a present value at a risk-adjusted rate. Discount rates and terminal capitalization rates utilized in this approach were derived from property-specific information, market transactions and other financial and industry data. The terminal capitalization rate and discount rate are significant unobservable inputs in determining the fair value. The terminal capitalization rate used in the calculation was 7.8% and the discount rate used was 8.5%. These inputs are classified under Level 3 in the fair value hierarchy above. Should the significant assumptions utilized above to determine fair value continue to deteriorate, additional impairments in the future could be possible. Other Fair Value Disclosures 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, 2021 December 31, 2020 Level 1 Quoted Prices in Active Markets for Identical Assets or Liabilities $ — $ — Level 2 Significant Observable Inputs 1,226,528 1,207,531 Level 3 Significant Unobservable Inputs 406,051 432,272 Total fair value of debt $ 1,632,579 $ 1,639,803 Recorded value of debt $ 1,542,760 $ 1,567,886 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.

Shareholders' Equity of the Com

Shareholders' Equity of the Company	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Shareholders' Equity of the Company	Shareholders’ Equity of the Company Dividend Declaration In January 2021, the Company's Board of Directors declared a $0.1775 cash dividend per common share payable on February 12, 2021 to each shareholder of record on January 29, 2021, and the Trustees of Tanger GP Trust declared a $0.1775 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders. In January 2020, the Company's Board of Directors declared a $0.355 cash dividend per common which was paid during the first quarter of 2020 to each shareholder of record on January 31, 2020, and the Trustees of Tanger GP Trust declared a $0.355 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders. Also in January 2020, the Company's Board of Directors declared a $0.3575 cash dividend per common share payable on May 15, 2020 to each shareholder of record on April 30, 2020, and the Trustees of Tanger GP Trust declared a $0.3575 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders. At-the-Market Offering Under our at-the-market stock offering program (“ATM Offering”), which commenced February 2021, we may offer and sell our common shares, $0.01 par value per share (“Common Shares”), having an aggregate gross sales price of up to $250.0 million (the “Shares”). We may sell the Shares in amounts and at times to be determined by us but we have no obligation to sell any of the Shares. Actual sales, if any, will depend on a variety of factors to be determined by us from time to time, including, among other things, market conditions, the trading price of the Common Shares, capital needs and determinations by us of the appropriate sources of its funding. We currently intend to use the net proceeds from the sale of shares pursuant to the ATM Offering for working capital and general corporate purposes. The following table sets forth information regarding settlements under our ATM offering program: Three months ended March 31, 2021 2020 Number of common shares settled during the period 6,867,078 — Average price per share $ 19.02 $ — Aggregate gross proceeds (in thousands) $ 130,638 $ — Aggregate net proceeds after commissions and fees (in thousands) $ 128,655 $ —

Partners' Equity of the Operati

Partners' Equity of the Operating Partnership	3 Months Ended
	Mar. 31, 2021
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 Class B common limited partnership unit 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 Class B common limited partnership unit held by Tanger LP Trust. The following table sets forth the changes in outstanding partnership units for the three months ended March 31, 2021 and March 31, 2020: Limited Partnership Units General Partnership Units Class A Class B Total Balance December 31, 2019 1,000,000 4,911,173 91,892,260 96,803,433 Grant of restricted common share awards by the Company, net of forfeitures — — 241,038 241,038 Units withheld for employee income taxes — — (56,597) (56,597) Balance March 31, 2020 1,000,000 4,911,173 92,076,701 96,987,874 Balance December 31, 2020 1,000,000 4,794,643 92,569,801 97,364,444 Grant of restricted common share awards by the Company, net of forfeitures — — 469,675 469,675 Issuance of units 100,000 — 6,767,078 6,767,078 Units withheld for employee income taxes — — (111,977) (111,977) Balance March 31, 2021 1,100,000 4,794,643 99,694,577 104,489,220

Earnings Per Share of the Compa

Earnings Per Share of the Company	3 Months Ended
	Mar. 31, 2021
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, 2021 2020 Numerator: Net income (loss) attributable to Tanger Factory Outlet Centers, Inc. $ 4,133 $ (26,882) Less allocation of earnings to participating securities (207) (516) Net income (loss) available to common shareholders of Tanger Factory Outlet Centers, Inc. $ 3,926 $ (27,398) Denominator: Basic weighted average common shares 94,812 92,500 Effect of notional units 288 — Effect of outstanding options 717 — Diluted weighted average common shares 95,817 92,500 Basic earnings per common share: Net income (loss) $ 0.04 $ (0.30) Diluted earnings per common share: Net income (loss) $ 0.04 $ (0.30) 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, 2021, approximately 1.1 million notional units were excluded from the computation and for the three months ended March 31, 2020, approximately 1.5 million notional units were excluded from the computation 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 as 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, 2021, approximately 403,000 options were excluded from the computation, as they were anti-dilutive. For the three months ended March 31, 2020, approximately 521,000 options were excluded from the computation, 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, 2021
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, 2021 2020 Numerator: Net income (loss) attributable to partners of the Operating Partnership $ 4,342 $ (28,309) Less allocation of earnings to participating securities (207) (516) Net income (loss) available to common unitholders of the Operating Partnership $ 4,135 $ (28,825) Denominator: Basic weighted average common units 99,606 97,411 Effect of notional units 288 — Effect of outstanding options 717 — Diluted weighted average common units 100,611 97,411 Basic earnings per common unit: Net income (loss) $ 0.04 $ (0.30) Diluted earnings per common unit: Net income (loss) $ 0.04 $ (0.30) 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. There were no securities which had a dilutive effect on earnings per common unit for the three months ended March 31, 2021 and 2020. 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 units would be issuable if the end of the reporting period were the end of the contingency period. For the three months ended March 31, 2021 approximately 1.1 million notional units were excluded from the computation and for the three months ended March 31, 2020 approximately 1.5 million notional units were excluded from the computation 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 as 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, 2021, approximately 403,000 options were excluded from the computation. For the three months ended March 31, 2020, approximately 521,000 options were excluded from the computation 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, 2021
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), as amended (the “Plan”), which covers our non-employee directors, officers, employees and consultants. Per the Operating Partnership agreement, when a common share is 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, 2021 2020 Restricted common shares (1) $ 2,573 $ 2,227 Notional unit performance awards (1) 1,149 1,520 Options 123 41 Total equity-based compensation $ 3,845 $ 3,788 (1) The three months ended March 31, 2021 includes the accelerated recognition of compensation cost. 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, 2021 2020 Equity-based compensation expense capitalized $ 64 $ 101 Restricted Common Share and Restricted Share Unit Awards During February 2021, the Company granted approximately 385,000 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 was $14.60 per share. The restricted common shares vest ratably over a three year period on January 4th of each year for non-employee directors and on February 15th of each year for senior executive officers. 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 for the applicable income and other employment taxes, and remit cash to the appropriate taxing authorities. The total number of shares withheld upon vesting were approximately 112,000 and 57,000 for the three months ended March 31, 2021 and 2020, 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 were $1.6 million and $736,000 for the three months ended March 31, 2021 and 2020, respectively. These amounts are reflected as financing activities within the consolidated statements of cash flows. 2021 Performance Share Plan During February 2021, the Compensation Committee of the Company approved the general terms of the Tanger Factory Outlet Centers, Inc. 2021 Performance Share Plan (the “2021 PSP”) covering the Company's senior executive officers whereby a maximum of approximately 642,000 restricted common shares may be earned if certain share price appreciation goals are achieved over a three year measurement period. The 2021 PSP is a long-term incentive compensation plan. Recipients may earn units which may convert into restricted common shares of the Company based on the Company’s absolute share price appreciation (or absolute total shareholder return) and its share price appreciation relative to its peer group (or relative total shareholder return) over a three-year measurement period. Any shares earned at the end of the three-year measurement period are subject to a time-based vesting schedule, with 50% of the shares vesting immediately following the measurement period, and the remaining 50% vesting one year thereafter, contingent upon continued employment with the Company through the vesting date (unless terminated prior thereto (a) by the Company without cause, (b) by participant for good reason or, (c) due to death or disability). The following table sets forth 2021 PSP performance targets and other relevant information about the 2021 PSP: Performance targets (1) Absolute portion of award: Percent of total award 33.3% Absolute total shareholder return range 26.0 % - 40.5% 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) 30 th - 80th Percentage of units to be earned 20 % - 100% Maximum number of restricted common shares that may be earned (3) 642,423 February grant date fair value per share $ 9.65 (1) The number of restricted common shares received under the 2021 PSP 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 2021 PSP awards granted during the three months ended March 31, 2021 were determined at the grant dates using a Monte Carlo simulation pricing model and the following assumptions: Risk free interest rate (1) 0.2 % Expected dividend yield (2) 6.5 % Expected volatility (3) 61 % (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. 2018 Outperformance Plan On February 15, 2021, the measurement period for the 2018 Outperformance Plan ('the 2018 OPP") expired. Based on the Company’s relative total shareholder return over the three year measurement period, we issued 76,478 restricted common shares in February 2021, with 43,127 vesting immediately and the remaining 33,351 vesting in February one year thereafter, contingent upon continued employment with the Company through the vesting date. Our absolute share price appreciation (or total shareholder return) for the 2018 OPP did not meet the minimum share price appreciation and no shares were earned under this component of the 2018 OPP.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) of the Company	3 Months Ended
	Mar. 31, 2021
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 other comprehensive loss for the three months ended March 31, 2021 (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, 2020 $ (23,399) $ (3,186) $ (26,585) $ (1,281) $ (173) $ (1,454) Other comprehensive income before reclassifications 952 1,508 2,460 57 76 133 Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges 3,463 394 3,857 167 20 187 Balance March 31, 2021 $ (18,984) $ (1,284) $ (20,268) $ (1,057) $ (77) $ (1,134) The following table presents changes in the balances of each component of accumulated other comprehensive loss for the three months ended March 31, 2020 (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, 2019 $ (25,094) $ (401) $ (25,495) $ (1,369) $ (24) $ (1,393) Other comprehensive loss before reclassifications (7,343) (5,388) (12,731) (390) (286) (676) Reclassification out of accumulated other comprehensive income/loss for interest expense for cash flow hedges — (2) (2) — — — Balance March 31, 2020 $ (32,437) $ (5,791) $ (38,228) $ (1,759) $ (310) $ (2,069) We expect within the next twelve months to reclassify into earnings as an increase to interest expense approximately $905,000 of the amounts recorded within accumulated other comprehensive loss related to the interest rate swap agreements in effect as of March 31, 2021.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership	3 Months Ended
	Mar. 31, 2021
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 other comprehensive loss for the three months ended March 31, 2021 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2020 $ (24,680) $ (3,359) $ (28,039) Other comprehensive income before reclassifications 1,009 1,584 2,593 Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges 3,630 414 4,044 Balance March 31, 2021 $ (20,041) $ (1,361) $ (21,402) The following table presents changes in the balances of each component of accumulated other comprehensive loss for the three months ended March 31, 2020 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2019 $ (26,463) $ (425) $ (26,888) Other comprehensive loss before reclassifications (7,733) (5,674) (13,407) Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for interest expense for cash flow hedges — (2) (2) Balance March 31, 2020 $ (34,196) $ (6,101) $ (40,297) We expect within the next twelve months to reclassify into earnings as an increase to interest expense approximately $905,000 of the amounts recorded within accumulated other comprehensive loss related to the interest rate swap agreements in effect as of March 31, 2021.

Leasing Agreements

Leasing Agreements	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leasing Agreements	As of March 31, 2021, we were the lessor to over 2,100 stores in our 30 consolidated outlet centers, under operating leases with initial terms that expire from 2021 to 2035, with certain agreements containing extension options. We also have certain agreements that require tenants to pay their portion of reimbursable expenses such as common area expenses, utilities, insurance and real estate taxes. The components of rental revenues are as follows (in thousands): Three months ended March 31, 2021 2020 Rental revenues - fixed $ 74,919 $ 86,933 Rental revenues - variable (1) 22,548 21,625 Rental revenues $ 97,467 $ 108,558 (1) Primarily includes rents based on a percentage of tenant sales volume and reimbursable expenses such as common area expenses, utilities, insurance and real estate taxes.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]
Supplemental cash flow information	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): As of As of March 31, 2021 March 31, 2020 Costs relating to construction included in accounts payable and accrued expenses $ 15,849 $ 18,168 Dividends payable were as follows (in thousands): As of As of March 31, 2021 March 31, 2020 Dividends payable $ — $ 35,108 Interest paid, net of interest capitalized was as follows (in thousands): Three months ended March 31, 2021 2020 Interest paid $ 14,125 $ 14,811

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting PronouncementsRecently issued accounting standardsOn March 12, 2020, the FASB issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference LIBOR or other reference rates expected to be discontinued because of reference rate reform. This ASU is effective as of March 12, 2020 through December 31, 2022. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), which refines the scope of Topic 848 and clarifies some of its guidance. Specifically, certain provisions in Topic 848, if elected by an entity, apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. Amendments to the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. The amendments are effective immediately for all entities. An entity may elect to apply the amendments on a full retrospective basis. We have not adopted any of the optional expedients or exceptions through March 31, 2021, but will continue to evaluate the possible adoption of any such expedients or exceptions during the effective period as circumstances evolve.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend Declaration In April 2021, the Company's Board of Directors declared a $0.1775 cash dividend per common share payable on May 14, 2021 to each shareholder of record on March 31, 2021, and the Trustees of Tanger GP Trust declared a $0.1775 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders. Senior Notes 3.875%

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [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, 2020. The December 31, 2020 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	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 control such properties. 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 on 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 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, Columbus, Galveston/Houston, and National Harbor 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.
Impairment of Long-Lived Assets	Accounts Receivable The current novel COVID-19 pandemic (“COVID-19”) has had, and will continue to have, repercussions across local, national and global economies and financial markets. COVID-19 has impacted all states where our tenants operate their businesses or where our properties are located and measures taken to prevent or remediate COVID-19, including “shelter-in place” or “stay-at-home” orders or other quarantine mandates issued by local, state or federal authorities, have had an adverse effect on our business and the businesses of our tenants. The full extent of the adverse impact on, among other things, our results of operations, liquidity (including our ability to access capital markets), the possibility of future impairments of long-lived assets or our investments in unconsolidated joint ventures, our compliance with debt covenants, our ability to collect rent under our existing leases, our ability to renew and re - lease our leased space, the outlook for the retail environment, bankruptcies and potential further bankruptcies or other store closings and our ability to develop, acquire, dispose or lease properties for our portfolio, is unknown and will depend on future developments, which are highly uncertain and cannot be predicted. Our results of operations, liquidity and cash flows have been and may continue to be in the future materially affected. Due to the COVID-19 pandemic, a number of our tenants requested rent deferrals, rent abatements or other types of rent relief during this pandemic. As a response, in late March 2020, we offered all tenants in our consolidated portfolio the option to defer 100% of April and May rents interest free, payable in equal installments due in January and February of 2021. Historically, our accounts receivable from tenants has not been material; however, given the impacts from the COVID-19 pandemic discussed above, our net accounts receivable balance, which is recorded in prepaids and other assets on the consolidated balance sheet, had increased to approximately $18.8 million at December 31, 2020, but decreased to approximately $12.8 million at March 31, 2021, primarily due to deferred rent collections. Straight-line rent adjustments recorded as a receivable in prepaids and other assets on the consolidated balance sheets was approximately $54.4 million as of March 31, 2021. Individual leases are assessed for collectability and upon the determination that the collection of rents is not probable, accrued rent and accounts receivable are written-off as an adjustment to rental revenue. Revenue from leases where collection is deemed to be less than probable is recorded on a cash basis until collectability is determined to be probable. Further we assess whether operating lease receivables, at a portfolio level, are appropriately valued based upon an analysis of balances outstanding, historical bad debt levels and current economic trends including discussions with tenants for potential lease amendments. Our estimate of the collectability of accrued rents and accounts receivable is based on the best information available to us at the time of preparing the financial statements. The duration of the COVID-19 pandemic, recent tenant bankruptcies and other significant uncertainties with the economy required significant judgment to be used when estimating the collection of rents through March 31, 2021. As a result of the actual collections of 2020 deferred rents due to be repaid during the first quarter of 2021, the Company recorded a $1.6 million reversal of rental revenue reserves during the first quarter of 2021 related to prior period rents that were previously deferred. As of March 31, 2021, remaining rental revenue reserves totaled $2.6 million, or 39% of the total remaining 2020 rents deferred or under negotiation. Based on rents received through April 30, 2021, collections of contractual fixed rents billed of $85.6 million in the first quarter of 2021 for the consolidated portfolio were approximately 95%. Impairment of Long-Lived Assets Rental property held and used by us is reviewed for impairment in the event that facts and circumstances indicate that the carrying amount of an asset may not be recoverable. In such an event, we compare the estimated future undiscounted cash flows associated with the asset to the asset's carrying amount, and if less, recognize an impairment loss in an amount by which the carrying amount exceeds its fair value. During the first quarter and fourth quarter of 2020, we recorded $45.7 million and $19.2 million in impairment charges, respectively, related to our Foxwoods outlet center in our consolidated statement of operations which equaled the excess of the carrying value over its estimated fair value. If the effects of the COVID-19 pandemic cause economic and market conditions to deteriorate beyond our current expectations or if our expected holding periods for assets change, subsequent tests for impairment could result in additional impairment charges in the future. We can provide no assurance that material impairment charges with respect to our properties will not occur during 2021 or future periods.
New Accounting Pronouncements	Recently issued accounting standardsOn March 12, 2020, the FASB issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference LIBOR or other reference rates expected to be discontinued because of reference rate reform. This ASU is effective as of March 12, 2020 through December 31, 2022. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), which refines the scope of Topic 848 and clarifies some of its guidance. Specifically, certain provisions in Topic 848, if elected by an entity, apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. Amendments to the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. The amendments are effective immediately for all entities. An entity may elect to apply the amendments on a full retrospective basis. We have not adopted any of the optional expedients or exceptions through March 31, 2021, but will continue to evaluate the possible adoption of any such expedients or exceptions during the effective period as circumstances evolve.

Disposition of Properties (Tabl

Disposition of Properties (Tables)	3 Months Ended
	Mar. 31, 2021
Disposition of Properties [Abstract]
Disposition of Property	The following table sets forth certain summarized information regarding properties sold during the three months ended March 31, 2021: Property (1) Location Date Sold Square Feet Net Sales Proceeds Gain on Sale 2021 Disposition: Jeffersonville Jeffersonville, Ohio January 2021 412 $ 8,100 — (1) The rental properties sold did not meet the criteria to be reported as discontinued operations.

Investments in Unconsolidated_2

Investments in Unconsolidated Real Estate Joint Ventures (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021 Joint Venture Outlet Center Location Ownership % Square Feet Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (in millions) (1) Investments included in investments in unconsolidated joint ventures: Columbus Columbus, OH 50.0 % 355 $ 1.6 $ 70.8 RioCan Canada Various 50.0 % 665 87.9 — $ 89.5 Investments included in other liabilities: Charlotte (2) Charlotte, NC 50.0 % 399 $ (12.4) $ 99.6 National Harbor (2) National Harbor, MD 50.0 % 341 (9.8) 94.5 Galveston/Houston (2) Texas City, TX 50.0 % 353 (12.2) 64.3 $ (34.4) As of December 31, 2020 Joint Venture Outlet Center Location Ownership % Square Feet Carrying Value of Investment (in millions) Total Joint Venture Debt, Net (in millions) (1) Investments included in investments in unconsolidated joint ventures: Columbus Columbus, OH 50.0 % 355 $ 2.0 $ 70.8 RioCan Canada Various 50.0 % 765 92.6 $ — $ 94.6 Investments included in other liabilities: Charlotte (2) Charlotte, NC 50.0 % 399 (12.8) 99.6 National Harbor (2) National Harbor, MD 50.0 % 341 (8.4) 94.5 Galveston/Houston (2) Texas City, TX 50.0 % 353 (19.5) 80.0 $ (40.7) (1) Net of debt origination costs of $1.3 million as of March 31, 2021 and $1.1 million as of December 31, 2020.
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, 2021 2020 Fee: Management and marketing $ 509 $ 541 Leasing and other fees 56 20 Expense reimbursements from unconsolidated joint ventures 807 882 Total Fees $ 1,372 $ 1,443
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, 2021 December 31, 2020 Assets Land $ 83,486 $ 86,861 Buildings, improvements and fixtures 467,316 471,798 Construction in progress 3,059 2,976 553,861 561,635 Accumulated depreciation (151,140) (145,810) Total rental property, net 402,721 415,825 Cash and cash equivalents 20,459 21,471 Deferred lease costs and other intangibles, net 4,475 4,849 Prepaids and other assets 18,567 20,478 Total assets $ 446,222 $ 462,623 Liabilities and Owners’ Equity Mortgages payable, net $ 329,249 $ 344,856 Accounts payable and other liabilities 14,188 17,427 Total liabilities 343,437 362,283 Owners’ equity 102,785 100,340 Total liabilities and owners’ equity $ 446,222 $ 462,623
Summary Financial Information Of Unconsolidated JVs Statements of Operations	Three months ended Condensed Combined Statements of Operations March 31, - Unconsolidated Joint Ventures 2021 2020 Revenues $ 20,992 $ 22,036 Expenses: Property operating 8,413 9,129 General and administrative 29 139 Depreciation and amortization 5,901 5,906 Total expenses 14,343 15,174 Other income (expense): Interest expense (2,945) (3,735) Gain on sale of assets 503 — Other income 59 56 Total other expense $ (2,383) $ (3,679) Net income $ 4,266 $ 3,183 The Company and Operating Partnership’s share of: Net income $ 1,769 $ 1,527 Depreciation and amortization (real estate related) $ 2,996 $ 3,018

Debt Guaranteed by the Company

Debt Guaranteed by the Company (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021 December 31, 2020 Unsecured lines of credit $ — $ — Unsecured term loan $ 325,000 $ 350,000

Debt of the Operating Partner_2

Debt of the Operating Partnership (Tables) - Tanger Properties Limited Partnership [Member]	3 Months Ended
	Mar. 31, 2021
Schedule of Debt	The debt of the Operating Partnership consisted of the following (in thousands): As of As of March 31, 2021 December 31, 2020 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 $ 248,136 $ 250,000 $ 247,967 Senior notes 3.750 % December 2024 250,000 248,585 250,000 248,493 Senior notes 3.125 % September 2026 350,000 346,909 350,000 346,770 Senior notes 3.875 % July 2027 300,000 297,444 300,000 297,346 Mortgages payable: Atlantic City (2)(3) 5.14 % - 7.65% November 2021- December 2026 26,420 27,547 27,343 28,569 Southaven (4) LIBOR + 1.80% April 2021 51,400 51,386 51,400 51,371 Unsecured term loan LIBOR (5) + 1.00% April 2024 325,000 322,753 350,000 347,370 Unsecured lines of credit LIBOR (5) + 1.00% October 2021 (6) — — — — $ 1,552,820 $ 1,542,760 $ 1,578,743 $ 1,567,886 (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. (4) In April 2021 we extended the maturity date 90 days to explore other financing options however, we may extend the loan using our two-year extension option to April 2023, which could require reductions in principal or additional guarantees to comply with extension requirements. (5) Beginning in June 2020, if LIBOR is less than 0.25% per annum, the rate will be deemed to be 0.25% for the portions of the lines of credit and bank term loan that are not fixed with an interest rate swap. (6) Unsecured lines of credit have a one-year extension option to extend maturity to October 2022.
Schedule of Maturities of Long-term Debt	Maturities of the existing long-term debt as of March 31, 2021 for the next five years and thereafter are as follows (in thousands): Calendar Year Amount For the remainder of 2021 $ 56,270 2022 4,436 2023 254,768 2024 580,140 2025 1,501 Thereafter 655,705 Subtotal 1,552,820 Net discount and debt origination costs (10,060) Total $ 1,542,760

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021 December 31, 2020 Assets (Liabilities) (1) : Interest rate swaps: April 13, 2016 January 1, 2021 175,000 1 month LIBOR 1.03 % $ — $ (17) March 1, 2018 January 31, 2021 40,000 1 month LIBOR 2.47 % — (75) August 14, 2018 January 1, 2021 150,000 1 month LIBOR 2.20 % — (34) July 1, 2019 February 1, 2024 25,000 1 month LIBOR 1.75 % (956) (1,192) January 1, 2021 February 1, 2024 150,000 1 month LIBOR 0.60 % (936) (1,901) January 1, 2021 February 1, 2024 100,000 1 month LIBOR 0.22 % 434 (139) March 1, 2021 February 1, 2024 25,000 1 month LIBOR 0.24 % 99 — Total $ (1,359) $ (3,358)
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, 2021 2020 Interest Rate Swaps: Amount of gain (loss) recognized in other comprehensive income (loss) $ 1,998 $ (5,676)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021: Assets: Short-term government securities ( cash and cash equivalents) $ 194,518 $ 194,518 $ — $ — Interest rate swaps (prepaids and other assets) 533 — 533 — Total assets $ 195,051 $ 194,518 $ 533 $ — Liabilities: Interest rate swaps (other liabilities) $ 1,893 $ — $ 1,893 $ — Total liabilities $ 1,893 $ — $ 1,893 $ — 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, 2020: Asset: Short-term government securities ( cash and cash equivalents) $ 87,081 $ 87,081 $ — $ — Total assets $ 87,081 $ 87,081 $ — $ — Liabilities: Interest rate swaps (other liabilities) $ 3,358 $ — $ 3,358 $ — Total liabilities $ 3,358 $ — $ 3,358 $ —
Fair Value Measurements on a Nonrecurring Basis	The following table sets forth our assets that are measured at fair value on a nonrecurring basis 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 31,2020: Asset: Long-lived assets $ 60,000 $ — $ — $ 60,000
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, 2021 December 31, 2020 Level 1 Quoted Prices in Active Markets for Identical Assets or Liabilities $ — $ — Level 2 Significant Observable Inputs 1,226,528 1,207,531 Level 3 Significant Unobservable Inputs 406,051 432,272 Total fair value of debt $ 1,632,579 $ 1,639,803 Recorded value of debt $ 1,542,760 $ 1,567,886

Shareholders' Equity of the C_2

Shareholders' Equity of the Company (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Schedule of share issuances	The following table sets forth information regarding settlements under our ATM offering program: Three months ended March 31, 2021 2020 Number of common shares settled during the period 6,867,078 — Average price per share $ 19.02 $ — Aggregate gross proceeds (in thousands) $ 130,638 $ — Aggregate net proceeds after commissions and fees (in thousands) $ 128,655 $ —

Partners' Equity of the Opera_2

Partners' Equity of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021 and March 31, 2020: Limited Partnership Units General Partnership Units Class A Class B Total Balance December 31, 2019 1,000,000 4,911,173 91,892,260 96,803,433 Grant of restricted common share awards by the Company, net of forfeitures — — 241,038 241,038 Units withheld for employee income taxes — — (56,597) (56,597) Balance March 31, 2020 1,000,000 4,911,173 92,076,701 96,987,874 Balance December 31, 2020 1,000,000 4,794,643 92,569,801 97,364,444 Grant of restricted common share awards by the Company, net of forfeitures — — 469,675 469,675 Issuance of units 100,000 — 6,767,078 6,767,078 Units withheld for employee income taxes — — (111,977) (111,977) Balance March 31, 2021 1,100,000 4,794,643 99,694,577 104,489,220

Earnings Per Share of the Com_2

Earnings Per Share of the Company (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021 2020 Numerator: Net income (loss) attributable to Tanger Factory Outlet Centers, Inc. $ 4,133 $ (26,882) Less allocation of earnings to participating securities (207) (516) Net income (loss) available to common shareholders of Tanger Factory Outlet Centers, Inc. $ 3,926 $ (27,398) Denominator: Basic weighted average common shares 94,812 92,500 Effect of notional units 288 — Effect of outstanding options 717 — Diluted weighted average common shares 95,817 92,500 Basic earnings per common share: Net income (loss) $ 0.04 $ (0.30) Diluted earnings per common share: Net income (loss) $ 0.04 $ (0.30)

Earnings Per Unit of the Oper_2

Earnings Per Unit of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2021
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, 2021 2020 Numerator: Net income (loss) attributable to partners of the Operating Partnership $ 4,342 $ (28,309) Less allocation of earnings to participating securities (207) (516) Net income (loss) available to common unitholders of the Operating Partnership $ 4,135 $ (28,825) Denominator: Basic weighted average common units 99,606 97,411 Effect of notional units 288 — Effect of outstanding options 717 — Diluted weighted average common units 100,611 97,411 Basic earnings per common unit: Net income (loss) $ 0.04 $ (0.30) Diluted earnings per common unit: Net income (loss) $ 0.04 $ (0.30)

Equity-Based Compensation of _2

Equity-Based Compensation of the Company (Tables) - Tanger Factory Outlet Centers, Inc. [Member]	3 Months Ended
	Mar. 31, 2021
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, 2021 2020 Restricted common shares (1) $ 2,573 $ 2,227 Notional unit performance awards (1) 1,149 1,520 Options 123 41 Total equity-based compensation $ 3,845 $ 3,788 (1) The three months ended March 31, 2021 includes the accelerated recognition of compensation cost. 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, 2021 2020 Equity-based compensation expense capitalized $ 64 $ 101
Schedule of Nonvested Performance-based Units Activity	The following table sets forth 2021 PSP performance targets and other relevant information about the 2021 PSP: Performance targets (1) Absolute portion of award: Percent of total award 33.3% Absolute total shareholder return range 26.0 % - 40.5% 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) 30 th - 80th Percentage of units to be earned 20 % - 100% Maximum number of restricted common shares that may be earned (3) 642,423 February grant date fair value per share $ 9.65 (1) The number of restricted common shares received under the 2021 PSP 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 2021 PSP awards granted during the three months ended March 31, 2021 were determined at the grant dates using a Monte Carlo simulation pricing model and the following assumptions: Risk free interest rate (1) 0.2 % Expected dividend yield (2) 6.5 % Expected volatility (3) 61 % (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.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) of the Company (Tables)	3 Months Ended
	Mar. 31, 2021
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 other comprehensive loss for the three months ended March 31, 2021 (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, 2020 $ (23,399) $ (3,186) $ (26,585) $ (1,281) $ (173) $ (1,454) Other comprehensive income before reclassifications 952 1,508 2,460 57 76 133 Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges 3,463 394 3,857 167 20 187 Balance March 31, 2021 $ (18,984) $ (1,284) $ (20,268) $ (1,057) $ (77) $ (1,134) The following table presents changes in the balances of each component of accumulated other comprehensive loss for the three months ended March 31, 2020 (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, 2019 $ (25,094) $ (401) $ (25,495) $ (1,369) $ (24) $ (1,393) Other comprehensive loss before reclassifications (7,343) (5,388) (12,731) (390) (286) (676) Reclassification out of accumulated other comprehensive income/loss for interest expense for cash flow hedges — (2) (2) — — — Balance March 31, 2020 $ (32,437) $ (5,791) $ (38,228) $ (1,759) $ (310) $ (2,069)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2021
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 other comprehensive loss for the three months ended March 31, 2021 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2020 $ (24,680) $ (3,359) $ (28,039) Other comprehensive income before reclassifications 1,009 1,584 2,593 Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges 3,630 414 4,044 Balance March 31, 2021 $ (20,041) $ (1,361) $ (21,402) The following table presents changes in the balances of each component of accumulated other comprehensive loss for the three months ended March 31, 2020 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2019 $ (26,463) $ (425) $ (26,888) Other comprehensive loss before reclassifications (7,733) (5,674) (13,407) Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for interest expense for cash flow hedges — (2) (2) Balance March 31, 2020 $ (34,196) $ (6,101) $ (40,297)

Leasing Agreements (Tables)

Leasing Agreements (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Components of rental revenues	The components of rental revenues are as follows (in thousands): Three months ended March 31, 2021 2020 Rental revenues - fixed $ 74,919 $ 86,933 Rental revenues - variable (1) 22,548 21,625 Rental revenues $ 97,467 $ 108,558 (1) Primarily includes rents based on a percentage of tenant sales volume and reimbursable expenses such as common area expenses, utilities, insurance and real estate taxes.

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Expenditures included in accounts payable and accrued expenses were as follows (in thousands): As of As of March 31, 2021 March 31, 2020 Costs relating to construction included in accounts payable and accrued expenses $ 15,849 $ 18,168 Dividends payable were as follows (in thousands): As of As of March 31, 2021 March 31, 2020 Dividends payable $ — $ 35,108 Interest paid, net of interest capitalized was as follows (in thousands): Three months ended March 31, 2021 2020 Interest paid $ 14,125 $ 14,811

Business (Details)

Business (Details) ft² in Millions	Mar. 31, 2021sharesft²OutletCentersubsidiary
Entity Information [Line Items]
Number of Operating Partnership Units Owned by the Company | shares	100,794,577
Exchange ratio of Partnership Units for common shares	1
Consolidated Properties [Member]
Entity Information [Line Items]
Number of outlet centers	30
Total gross leaseable area of outlet centers (in square feet) | ft²	11.5
Unconsolidated Properties [Member]
Entity Information [Line Items]
Number of outlet centers	6
Total gross leaseable area of outlet centers (in square feet) | ft²	2.1
Unconsolidated Properties [Member] | CANADA
Entity Information [Line Items]
Number of outlet centers	2
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	4,794,643

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Deferral option percentage	100.00%
Net accounts receivable		$ 12.8	$ 18.8
Straight line rent adjustments receivable		54.4
Uncollectible accounts reserve increase (decrease)		(1.6)
Rental revenue reserve balance		$ 2.6
Percentage of deferred or under negotiation		39.00%
Payments for Rent		$ 85.6
Percent of Rents collected		95.00%
Foxwoods [Member]
Impairment charge			$ 19.2	$ 45.7

Disposition of Properties (Deta

Disposition of Properties (Details) - Jeffersonville - Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] ft² in Thousands, $ in Thousands	1 Months Ended
	Jan. 31, 2021USD ($)ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of Real Estate Property | ft²	412
Net Sales Proceeds	$ 8,100
Gain (loss) on asset sale	$ 0

Investments in Unconsolidated_3

Investments in Unconsolidated Real Estate Joint Ventures (Unconsolidated Real Estate Joint Ventures) (Details) ft² in Thousands, $ in Thousands	Mar. 31, 2021USD ($)ft²	Dec. 31, 2020USD ($)ft²
Columbus and RioCan Canada
Schedule of Equity Method Investments [Line Items]
Carrying Value of Investment	$ 89,500	$ 94,600
Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	355	355
Carrying Value of Investment	$ 1,600	$ 2,000
RioCan Canda [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	665	765
Carrying Value of Investment	$ 87,900	$ 92,600
Charlotte, National Harbor and Galveston/Houston
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Reported In Liabilities	$ (34,400)	$ (40,700)
Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	399	399
Equity Method Investment Reported In Liabilities	$ (12,400)	$ (12,800)
National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	341	341
Equity Method Investment Reported In Liabilities	$ (9,800)	$ (8,400)
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	$ (12,200)	$ (19,500)
Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	329,249	344,856
Unconsolidated Properties [Member] | Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	70,800	70,800
Unconsolidated Properties [Member] | RioCan Canda [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	0	0
Unconsolidated Properties [Member] | Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	99,600	99,600
Unconsolidated Properties [Member] | National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	94,500	94,500
Unconsolidated Properties [Member] | Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	64,300	80,000
Mortgages [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Net debt origination costs	$ 1,300	$ 1,100

Investments in Unconsolidated_4

Investments in Unconsolidated Real Estate Joint Ventures (Joint Venture Fees) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Management, Leasing and other services [Line Items]
Fees received	$ 1,372	$ 1,443
Management and Marketing Fee [Member]
Management, Leasing and other services [Line Items]
Fees received	509	541
Leasing and other fees [Member]
Management, Leasing and other services [Line Items]
Fees received	56	20
Expense reimbursements from unconsolidated joint ventures [Member]
Management, Leasing and other services [Line Items]
Fees received	$ 807	$ 882

Investments in Unconsolidated_5

Investments in Unconsolidated Real Estate Joint Ventures (Summary Balance Sheets for Unconsolidated Joint Ventures) (Details) - Unconsolidated Properties [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Land	$ 83,486	$ 86,861
Buildings, improvements and fixtures	467,316	471,798
Construction in progress	3,059	2,976
Rental property, at cost, total	553,861	561,635
Accumulated depreciation	(151,140)	(145,810)
Total rental property, net	402,721	415,825
Cash and cash equivalents	20,459	21,471
Deferred lease costs and other intangibles, net	4,475	4,849
Prepaids and other assets	18,567	20,478
Total assets	446,222	462,623
Liabilities and Owners’ Equity
Mortgages payable, net	329,249	344,856
Accounts payable and other liabilities	14,188	17,427
Total liabilities	343,437	362,283
Owners’ equity	102,785	100,340
Total liabilities and equity	$ 446,222	$ 462,623

Investments in Unconsolidated_6

Investments in Unconsolidated Real Estate Joint Ventures (Summary Statements of Operations for Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Unconsolidated Properties [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	$ 20,992	$ 22,036
Expenses:
Property operating	8,413	9,129
General and administrative	29	139
Depreciation and amortization	5,901	5,906
Total expenses	14,343	15,174
Interest expense	(2,945)	(3,735)
Gain (loss) on asset sale	503	0
Other income (expense)	59	56
Total other income (expense)	(2,383)	(3,679)
Net income (loss)	4,266	3,183
Tanger Factory Outlet Centers, Inc. [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	100,694	111,633
Expenses:
Property operating	35,311	38,627
General and administrative	16,793	12,584
Depreciation and amortization	28,150	29,417
Total expenses	80,254	126,303
Interest expense	(14,362)	(15,196)
Other income (expense)	(3,505)	220
Total other income (expense)	(17,867)	(14,976)
Net income (loss)	4,342	(28,119)
The Company and Operating Partnership's share of:
Net income	1,769	1,527
Depreciation and amortization (real estate related)	$ 2,996	$ 3,018

Investments in Unconsolidated_7

Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended			3 Months Ended
	Mar. 31, 2021	Feb. 28, 2021	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Differences in basis	$ 3,400			$ 3,400		$ 3,600
Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Gain (loss) on asset sale				$ 503	$ 0
Galveston/Houston [Member] | Mortgages [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount		$ 64,500	$ 80,000
Basis spread on variable rate		1.85%	1.65%
Les Factoreries St. Sauveur Property [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of assets	9,400
Our Share of Proceeds From Sale Of Other Real Estate	4,700
Gain (loss) on asset sale	(3,700)
Foreign currency loss	$ (3,600)

Debt Guaranteed by the Compan_2

Debt Guaranteed by the Company (Details) - Debt [Member] - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit borrowing capacity	$ 600,000,000
Tanger Factory Outlet Centers, Inc. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Guarantor obligation	0	$ 0
Tanger Factory Outlet Centers, Inc. [Member] | Unsecured Term Loan [Member]
Line of Credit Facility [Line Items]
Guarantor obligation	$ 325,000,000	$ 350,000,000

Debt of the Operating Partner_3

Debt of the Operating Partnership (Schedule of Debt) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020	Dec. 31, 2011
Debt Instrument [Line Items]
LIBOR floor interest rate	0.25%
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Principal	$ 1,552,820,000		$ 1,578,743,000
Book value of debt	$ 1,542,760,000		1,567,886,000
Tanger Properties Limited Partnership [Member] | 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	$ 248,136,000		247,967,000
Tanger Properties Limited Partnership [Member] | 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	$ 248,585,000		248,493,000
Tanger Properties Limited Partnership [Member] | 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	$ 346,909,000		346,770,000
Tanger Properties Limited Partnership [Member] | 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	297,444,000		297,346,000
Tanger Properties Limited Partnership [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Principal	26,420,000		27,343,000
Book value of debt	27,547,000		28,569,000
Effective interest rates				5.05%
Tanger Properties Limited Partnership [Member] | Mortgages Payable [Member] | Southaven [Member]
Debt Instrument [Line Items]
Principal	51,400,000		51,400,000
Book value of debt	$ 51,386,000		51,371,000
Term of mortgage extension	2 years
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Principal	$ 325,000,000	$ 350,000,000	350,000,000
Book value of debt	322,753,000		347,370,000
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Principal	0		0
Book value of debt	$ 0		$ 0
Term of mortgage extension	1 year
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mortgages Payable [Member] | Southaven [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.80%
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Tanger Properties Limited Partnership [Member] | Minimum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Stated Interest Rate(s)	5.14%
Tanger Properties Limited Partnership [Member] | 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 Partner_4

Debt of the Operating Partnership (Debt Maturities) (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Maturities of Debt [Line Items]
For the remainder of 2021	$ 56,270
2022	4,436
2023	254,768
2024	580,140
2025	1,501
Thereafter	655,705
Subtotal	1,552,820	$ 1,578,743
Net discount and debt origination costs	(10,060)
Total debt	$ 1,542,760	$ 1,567,886

Debt of the Operating Partner_5

Debt of the Operating Partnership (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Feb. 28, 2021	Dec. 31, 2020
Minimum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty	5.00%	5.00%
Maximum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty	100.00%	100.00%
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Repayments of Other Long-term Debt		$ 25,924,000	$ 873,000
Principal	$ 1,552,820,000	1,552,820,000			$ 1,578,743,000
Tanger Properties Limited Partnership [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Net book value of collateral for mortgages payable	161,700,000	161,700,000
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	20,000,000
Line of Credit Facility, Syndicated Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings	580,000,000	580,000,000
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized	1,200,000,000	$ 1,200,000,000
Percentage of funds from operations allowed on a cumulative basis to pay dividends		95.00%
Principal	0	$ 0			0
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Repayments of Other Long-term Debt	25,000,000
Principal	325,000,000	325,000,000		$ 350,000,000	350,000,000
Tanger Properties Limited Partnership [Member] | Debt [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit borrowing capacity	600,000,000	600,000,000
Tanger Factory Outlet Centers, Inc. [Member]
Debt Instrument [Line Items]
Repayments of Other Long-term Debt		25,924,000	$ 873,000
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	21,900,000	21,900,000
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	0	0			0
Tanger Factory Outlet Centers, Inc. [Member] | Debt [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Maximum amount of unconsolidated joint venture debt guaranteed by the Company	$ 325,000,000	$ 325,000,000			$ 350,000,000

Derivative Financial Instrume_3

Derivative Financial Instruments (Classifications on Consolidated Balance Sheets) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Fair Value	$ (1,359)	$ (3,358)
Interest Rate Swap April 13, 2016 [Member]
Derivative [Line Items]
Notional Amount	$ 175,000
Company Fixed Pay Rate	1.03%
Fair Value	$ 0	(17)
Interest Rate Swap March 1, 2018 [Member]
Derivative [Line Items]
Notional Amount	$ 40,000
Company Fixed Pay Rate	2.47%
Fair Value	$ 0	(75)
Interest Rate Swap August 14, 2018 [Member]
Derivative [Line Items]
Notional Amount	$ 150,000
Company Fixed Pay Rate	2.20%
Fair Value	$ 0	(34)
Interest Rate Swap July 1, 2019 [Member]
Derivative [Line Items]
Notional Amount	$ 25,000
Company Fixed Pay Rate	1.75%
Fair Value	$ (956)	(1,192)
Interest Rate Swap January 1, 2021 [1] [Member]
Derivative [Line Items]
Notional Amount	$ 150,000
Company Fixed Pay Rate	0.60%
Fair Value	$ (936)	(1,901)
Interest Rate Swap January 1, 2021 [2] [Member]
Derivative [Line Items]
Notional Amount	$ 100,000
Company Fixed Pay Rate	0.22%
Fair Value	$ 434	(139)
Interest Rate Swap March 1, 2021 [Member]
Derivative [Line Items]
Notional Amount	$ 25,000
Company Fixed Pay Rate	0.24%
Fair Value	$ 99	$ 0
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap April 13, 2016 [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap March 1, 2018 [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap August 14, 2018 [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap July 1, 2019 [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap January 1, 2021 [1] [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap January 1, 2021 [2] [Member]
Derivative [Line Items]
Bank Pay Rate	1 month
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap March 1, 2021 [Member]
Derivative [Line Items]
Bank Pay Rate	1 month

Derivative Financial Instrume_4

Derivative Financial Instruments (Gain (Loss) Recognized and Reclassified) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income (loss)	$ 1,998	$ (5,676)

Fair Value Measurements (Recurr

Fair Value Measurements (Recurring) (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	$ 195,051	$ 87,081
Total liabilities	1,893	3,358
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	194,518	87,081
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	533	0
Total liabilities	1,893	3,358
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Total liabilities	0	0
Short-term government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term government securities (cash and cash equivalents)	194,518	87,081
Short-term government securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term government securities (cash and cash equivalents)	194,518	87,081
Short-term government securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term government securities (cash and cash equivalents)	0	0
Short-term government securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term government securities (cash and cash equivalents)	0	0
Interest Rate Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	533
Interest rate swaps (other liabilities)	1,893	3,358
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	0
Interest rate swaps (other liabilities)	0	0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	533
Interest rate swaps (other liabilities)	1,893	3,358
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)	0
Interest rate swaps (other liabilities)	$ 0	$ 0

Fair Value Measurements Nonrecu

Fair Value Measurements Nonrecurring (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Mar. 31, 2020
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets		$ 60,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets		60,000
Foxwoods [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge	$ 19,200	$ 45,700
Terminal capitalization rate | Foxwoods [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		7.80%
Discount rate | Foxwoods [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		8.50%

Fair Value Measurements (Debt)

Fair Value Measurements (Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	$ 1,632,579	$ 1,639,803
Recorded value of debt	1,542,760	1,567,886
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	1,226,528	1,207,531
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	$ 406,051	$ 432,272

Shareholders' Equity of the C_3

Shareholders' Equity of the Company (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Feb. 28, 2021	Dec. 31, 2020	Feb. 28, 2019
Class of Stock [Line Items]
At Market Stock Aggregate Gross Sales Price of Common Shares			$ 250
Tanger Factory Outlet Centers, Inc. [Member]
Class of Stock [Line Items]
Common dividends paid per common share (in dollars per share)	$ 0.1775	$ 0.355
Common dividends per common share (in dollars per share)		0.3575	$ 0.1775	$ 0.7125
Common shares, par value (in dollars per share)			$ 0.01		$ 0.01	$ 0.01
Additional amount authorized							$ 44.3
Authorized repurchase amount							$ 169.3
Remaining amount authorized to be repurchase			$ 80
Tanger Properties Limited Partnership [Member]
Class of Stock [Line Items]
Common distributions (in dollars per share)	$ 0.1775	0.355	$ 0.1775	$ 0.7125
Cash dividend declared (in dollars per unit)		$ 0.3575

Shareholders' Equity of the C_4

Shareholders' Equity of the Company (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Class of Stock [Line Items]
Number of common shares settled during the period	6,867,078	0
Average price per share	$ 19.02	$ 0
Aggregate gross proceeds (in thousands)	$ 130,638	$ 0
Proceeds from Issuance of Common Stock	$ 128,655	$ 0

Partners' Equity of the Opera_3

Partners' Equity of the Operating Partnership (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
General and Limited Partners' Capital Account, Units [Roll Forward]
Issuance of shares (in shares/units)	6,867,078	0
Tanger Properties Limited Partnership [Member]
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)	469,675	241,038
Units withheld for employee income taxes (in units)	(111,977)	(56,597)
General partner (in units)	1,100,000
Tanger Properties Limited Partnership [Member] | 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
Issuance of shares (in shares/units)	100,000
Units withheld for employee income taxes (in units)	0	0
General partner (in units)	1,100,000	1,000,000
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	4,794,643	4,911,173
Grant of restricted common shares awards, net of forfeitures (in units)	0	0
Issuance of shares (in shares/units)	0
Units withheld for employee income taxes (in units)	0	0
Limited partners (in units)	4,794,643	4,911,173
Tanger Properties Limited Partnership [Member] | Class B Limited Partnership Units [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	92,569,801	91,892,260
Grant of restricted common shares awards, net of forfeitures (in units)	469,675	241,038
Issuance of shares (in shares/units)	6,767,078
Units withheld for employee income taxes (in units)	(111,977)	(56,597)
Limited partners (in units)	99,694,577	92,076,701
Tanger Properties Limited Partnership [Member] | Limited partners [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	97,364,444	96,803,433
Grant of restricted common shares awards, net of forfeitures (in units)	469,675	241,038
Issuance of shares (in shares/units)	6,767,078
Units withheld for employee income taxes (in units)	(111,977)	(56,597)
Limited partners (in units)	104,489,220	96,987,874

Earnings Per Share of the Com_3

Earnings Per Share of the Company (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income (loss) attributable to Tanger Factory Outlet Centers, Inc.	$ 4,133	$ (26,882)
Less allocation of earnings to participating securities	(207)	(516)
Net income (loss) available to common shareholders/unitholders	$ 3,926	$ (27,398)
Denominator:
Basic weighted average common shares (in shares)	94,812,000	92,500,000
Effect of notional units (in shares)	288,000	0
Effect of outstanding options and certain restricted common shares (in shares)	717,000	0
Diluted weighted average common shares (in shares)	95,817,000	92,500,000
Basic earnings per common share/unit:
Net income (loss), basic (in dollars per share)	$ 0.04	$ (0.30)
Diluted earnings per common share:
Net income (loss), diluted (in dollars per share)	$ 0.04	$ (0.30)
Effect of notional units (in shares)	1,100,000	1,500,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	403,000	521,000

Earnings Per Unit of the Oper_3

Earnings Per Unit of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income (loss) attributable to partners of the Operating Partnership	$ 4,342	$ (28,309)
Less allocation of earnings to participating securities	(207)	(516)
Net income (loss) available to common shareholders/unitholders	$ 4,135	$ (28,825)
Denominator:
Basic weighted average common shares (in shares)	99,606,000	97,411,000
Effect of notional units (in shares)	288,000	0
Effect of outstanding options and certain restricted common shares (in shares)	717,000	0
Diluted weighted average common shares (in shares)	100,611,000	97,411,000
Basic earnings per common share/unit:
Net income (loss), basic (in dollars per share)	$ 0.04	$ (0.30)
Diluted earnings per common unit:
Net income (loss), diluted (in dollars per share)	$ 0.04	$ (0.30)
Effect of notional units (in shares)	1,100,000	1,500,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	403,000	521,000

Equity-Based Compensation of _3

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, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 3,845	$ 3,788
Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	2,573	2,227
Notional unit performance awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	1,149	1,520
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 123	$ 41

Equity-Based Compensation of _4

Equity-Based Compensation of the Company (Equity-Based Compensation Expense Capitalized) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense capitalized	$ 64	$ 101

Equity-Based Compensation of _5

Equity-Based Compensation of the Company (Outperformance Plan) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - 2021 PSP - $ / shares	1 Months Ended	3 Months Ended
	Feb. 28, 2021	Mar. 31, 2021
Maximum number of restricted common shares that may be earned		642,423
Granted (in dollars per share)		$ 9.65
Shares/Units, granted (in shares/units)	642,000
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		26.00%
Percentage of units to be earned		20.00%
Minimum [Member] | Relative portion of award [Member]
Percentage of units to be earned		20.00%
Percentile rank of peer group range		30.00%
Maximum [Member] | Absolute portion of award [Member]
Absolute total shareholder return		40.50%
Percentage of units to be earned		100.00%
Maximum [Member] | Relative portion of award [Member]
Percentage of units to be earned		100.00%
Percentile rank of peer group range		80.00%

Equity-Based Compensation of _6

Equity-Based Compensation of the Company (Outperformance Plan Assumptions) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - 2021 PSP	3 Months Ended
	Mar. 31, 2021
Risk Free Interest Rate	0.20%
Expected Dividend Rate	6.50%
Expected Volatility Rate	61.00%

Equity-Based Compensation of _7

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, 2021	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares paid for tax withholding for share based compensation (in shares)		111,977	56,597
Payment, Tax Withholding, Share-based Payment Arrangement		$ 1,637	$ 736
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)	385,000
Granted (in dollars per share)	$ 14.60
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] | Senior Executive Officers [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
2018 OPP | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Award Measurement Period	3 years
2018 OPP | Performance Shares [Member] | Relative portion of award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period	76,478
2018 OPP | Performance Shares [Member] | Absolute portion of award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period	0
2018 OPP | Vesting immediately [Member] | Performance Shares [Member] | Relative portion of award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period	43,127
2018 OPP | Vesting one year thereafter [Member] | Performance Shares [Member] | Relative portion of award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period	33,351
2021 PSP | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units, granted (in shares/units)	642,000
Granted (in dollars per share)		$ 9.65
Share-based Award Measurement Period	3 years
2021 PSP | Vesting immediately [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2021 PSP | 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 Comprehensi_5

Accumulated Other Comprehensive Income (Loss) of the Company (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 358,883	$ 456,109
Ending Balance	483,014	347,658
Interest rate swap gain (loss) to be reclassified within twelve months	905
Foreign Currency, Tanger Factory Outlet Centers, Inc., AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(23,399)	(25,094)
Other comprehensive income (loss) before reclassifications	952	(7,343)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	3,463	0
Ending Balance	(18,984)	(32,437)
Cash flow hedges, Tanger Factory Outlet Centers, Inc., AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(3,186)	(401)
Other comprehensive income (loss) before reclassifications	1,508	(5,388)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	394	(2)
Ending Balance	(1,284)	(5,791)
Total, Tanger Factory Outlet Centers, Inc., AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(26,585)	(25,495)
Other comprehensive income (loss) before reclassifications	2,460	(12,731)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	3,857	(2)
Ending Balance	(20,268)	(38,228)
Foreign Currency, noncontrolling interest, AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,281)	(1,369)
Other comprehensive income (loss) before reclassifications	57	(390)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	167	0
Ending Balance	(1,057)	(1,759)
Cash flow hedges, noncontrolling interest, AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(173)	(24)
Other comprehensive income (loss) before reclassifications	76	(286)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	20	0
Ending Balance	(77)	(310)
Total, noncontrolling interest, AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,454)	(1,393)
Other comprehensive income (loss) before reclassifications	133	(676)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	187	0
Ending Balance	$ (1,134)	$ (2,069)

Accumulated Other Comprehensi_6

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 358,883
Ending Balance	483,014
Interest rate swap gain (loss) to be reclassified within twelve months	905
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(24,680)	$ (26,463)
Other comprehensive income (loss) before reclassifications	1,009	(7,733)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	3,630
Ending Balance	(20,041)	(34,196)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(3,359)	(425)
Other comprehensive income (loss) before reclassifications	1,584	(5,674)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	414	(2)
Ending Balance	(1,361)	(6,101)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(28,039)	(26,888)
Other comprehensive income (loss) before reclassifications	2,593	(13,407)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	4,044	(2)
Ending Balance	$ (21,402)	$ (40,297)

Leasing Agreements - Rental Rev

Leasing Agreements - Rental Revenues (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)storeOutletCenter	Mar. 31, 2020USD ($)
Rental revenues - fixed	$ 74,919	$ 86,933
Rental revenues - variable	22,548	21,625
Rental revenues	$ 97,467	$ 108,558
Consolidated Properties [Member]
Number of stores | store	2,100
Number of outlet centers | OutletCenter	30

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Supplemental Cash Flow Information [Abstract]
Costs relating to construction included in accounts payable and accrued expenses	$ 15,849,000	$ 18,168,000
Dividends payable	0	35,108,000
Interest paid	$ 14,125,000	$ 14,811,000

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	1 Months Ended			3 Months Ended
	Apr. 30, 2021	Jan. 31, 2021	Jan. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Subsequent Event [Line Items]
Common dividends paid per common share (in dollars per share)		$ 0.1775	$ 0.355
Tanger Factory Outlet Centers, Inc. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Common dividends paid per common share (in dollars per share)	$ 0.1775
Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Common distributions (in dollars per share)		$ 0.1775	$ 0.355	$ 0.1775	$ 0.7125
Principal				$ 1,552,820,000		$ 1,578,743,000
Tanger Properties Limited Partnership [Member] | 3.875% 2023 Senior Notes [Member] | Senior Notes [Member]
Subsequent Event [Line Items]
Principal				$ 250,000,000		$ 250,000,000
Stated Interest Rate(s)				3.875%
Tanger Properties Limited Partnership [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Common distributions (in dollars per share)	$ 0.1775
Tanger Properties Limited Partnership [Member] | Subsequent Event [Member] | 3.875% 2023 Senior Notes [Member] | Senior Notes [Member]
Subsequent Event [Line Items]
principal amount redeemed	$ 150,000,000
Principal	100,000,000
Repayments of Other Debt	163,000,000
Debt retirement make whole premium	$ 13,000,000