Tanger (SKT) 10-Q 9 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 02, 2020
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	Sep. 30, 2020
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
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		93,453,271
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	Sep. 30, 2020	Dec. 31, 2019
Tanger Factory Outlet Centers, Inc. [Member]
Rental property:
Land	$ 266,014	$ 266,537
Buildings, improvements and fixtures	2,545,111	2,630,357
Rental property, at cost, total	2,811,125	2,896,894
Accumulated depreciation	(1,034,670)	(1,009,951)
Total rental property, net	1,776,455	1,886,943
Cash and cash equivalents	19,793	16,672
Investments in unconsolidated joint ventures	92,537	94,691
Deferred lease costs and other intangibles, net	88,183	96,712
Operating lease right-of-use assets	83,210	86,575
Prepaids and other assets	125,297	103,618
Total assets	2,185,475	2,285,211
Debt:
Senior, unsecured notes, net	1,140,080	1,138,603
Unsecured term loan, net	347,213	347,367
Mortgages payable, net	80,924	83,803
Unsecured lines of credit, net	0	0
Total debt	1,568,217	1,569,773
Accounts payable and accrued expenses	85,712	79,562
Operating lease liabilities	90,566	91,237
Other liabilities	91,495	88,530
Total liabilities	1,835,990	1,829,102
Commitments and contingencies
Tanger Factory Outlet Centers, Inc.:
Common shares, $0.01 par value, 300,000,000 shares authorized, 93,453,271 and 92,892,260 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	935	929
Paid in capital	783,815	775,035
Accumulated distributions in excess of net income	(420,367)	(317,263)
Partners’ Equity:
Accumulated other comprehensive loss	(32,347)	(25,495)
Equity attributable to Tanger Factory Outlet Centers, Inc.	332,036	433,206
Noncontrolling interests in Operating Partnership	17,449	22,903
Noncontrolling interests in other consolidated partnerships	0	0
Total equity	349,485	456,109
Total liabilities and equity	2,185,475	2,285,211
Tanger Properties Limited Partnership [Member]
Rental property:
Land	266,014	266,537
Buildings, improvements and fixtures	2,545,111	2,630,357
Rental property, at cost, total	2,811,125	2,896,894
Accumulated depreciation	(1,034,670)	(1,009,951)
Total rental property, net	1,776,455	1,886,943
Cash and cash equivalents	19,712	16,519
Investments in unconsolidated joint ventures	92,537	94,691
Deferred lease costs and other intangibles, net	88,183	96,712
Operating lease right-of-use assets	83,210	86,575
Prepaids and other assets	125,130	103,374
Total assets	2,185,227	2,284,814
Debt:
Senior, unsecured notes, net	1,140,080	1,138,603
Unsecured term loan, net	347,213	347,367
Mortgages payable, net	80,924	83,803
Unsecured lines of credit, net	0	0
Total debt	1,568,217	1,569,773
Accounts payable and accrued expenses	85,464	79,165
Operating lease liabilities	90,566	91,237
Other liabilities	91,495	88,530
Total liabilities	1,835,742	1,828,705
Commitments and contingencies
Partners’ Equity:
General partner, 1,000,000 units outstanding at September 30, 2020 and December 31, 2019	3,331	4,435
Limited partners, 4,911,173 and 4,911,173 Class A common units, and 92,453,271 and 91,892,260 Class B common units outstanding at September 30, 2020 and December 31, 2019, respectively	380,259	478,562
Accumulated other comprehensive loss	(34,105)	(26,888)
Total partners’ equity	349,485	456,109
Noncontrolling interests in other consolidated partnerships	0	0
Total equity	349,485	456,109
Total liabilities and equity	$ 2,185,227	$ 2,284,814

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
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	93,453,271	92,892,260
Common Stock, Shares, Outstanding	93,453,271	92,892,260
Tanger Properties Limited Partnership [Member]
General partner units, outstanding (in units)	1,000,000	1,000,000
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member]
Limited partners units, outstanding (in units)	4,911,173	4,911,173
Tanger Properties Limited Partnership [Member] | Class B Limited Partnership Units [Member]
Limited partners units, outstanding (in units)	92,453,271	91,892,260

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Rental revenues	$ 100,251	$ 115,050	$ 271,082	$ 347,389
Management, leasing and other services	1,194	1,356	3,362	3,943
Tanger Factory Outlet Centers, Inc. [Member]
Revenues:
Rental revenues	100,251	115,050	271,082	347,389
Management, leasing and other services	1,194	1,356	3,362	3,943
Other revenues	1,768	2,588	4,392	6,524
Total revenues	103,213	118,994	278,836	357,856
Expenses:
Property operating	35,206	39,149	101,991	118,252
General and administrative	11,181	12,292	35,331	40,910
Impairment charge	0	0	45,675	0
Depreciation and amortization	29,903	30,103	87,966	93,009
Total expenses	76,290	81,544	270,963	252,171
Other income (expense):
Interest expense	(15,647)	(15,197)	(47,786)	(46,638)
Gain on sale of assets	2,324	0	2,324	43,422
Other income (expense)	161	227	789	(2,966)
Total other income (expense)	(13,162)	(14,970)	(44,673)	(6,182)
Income (loss) before equity in earnings of unconsolidated joint ventures	13,761	22,480	(36,800)	99,503
Equity in earnings (losses) of unconsolidated joint ventures	(42)	2,329	(1,490)	5,604
Net income (loss)	13,719	24,809	(38,290)	105,107
Noncontrolling interests in Operating Partnership	(690)	(1,263)	1,939	(5,308)
Noncontrolling interests in other consolidated partnerships	0	0	(190)	(195)
Net income (loss) attributable to Tanger Factory Outlet Centers, Inc.	$ 13,029	$ 23,546	$ (36,541)	$ 99,604
Basic earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Diluted earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Tanger Properties Limited Partnership [Member]
Revenues:
Rental revenues	$ 100,251	$ 115,050	$ 271,082	$ 347,389
Management, leasing and other services	1,194	1,356	3,362	3,943
Other revenues	1,768	2,588	4,392	6,524
Total revenues	103,213	118,994	278,836	357,856
Expenses:
Property operating	35,206	39,149	101,991	118,252
General and administrative	11,181	12,292	35,331	40,910
Impairment charge	0	0	45,675	0
Depreciation and amortization	29,903	30,103	87,966	93,009
Total expenses	76,290	81,544	270,963	252,171
Other income (expense):
Interest expense	(15,647)	(15,197)	(47,786)	(46,638)
Gain on sale of assets	2,324	0	2,324	43,422
Other income (expense)	161	227	789	(2,966)
Total other income (expense)	(13,162)	(14,970)	(44,673)	(6,182)
Income (loss) before equity in earnings of unconsolidated joint ventures	13,761	22,480	(36,800)	99,503
Equity in earnings (losses) of unconsolidated joint ventures	(42)	2,329	(1,490)	5,604
Net income (loss)	13,719	24,809	(38,290)	105,107
Noncontrolling interests in consolidated partnerships	0	0	(190)	(195)
Net income (loss) attributable to Tanger Factory Outlet Centers, Inc.	13,719	24,809	(38,480)	104,912
Net income (loss) available to limited partners	13,580	24,556	(38,089)	103,850
Net income (loss) available to general partner	$ 139	$ 253	$ (391)	$ 1,062
Basic earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Diluted earnings per common share/unit
Net income (loss) (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Tanger Factory Outlet Centers, Inc. [Member]
Net income (loss)	$ 13,719	$ 24,809	$ (38,290)	$ 105,107
Other comprehensive income (loss):
Foreign currency translation adjustments	1,870	(1,051)	(2,506)	6,341
Change in fair value of cash flow hedges	1,463	(1,011)	(4,711)	(6,576)
Other comprehensive income (loss)	3,333	(2,062)	(7,217)	(235)
Comprehensive income (loss)	17,052	22,747	(45,507)	104,872
Comprehensive (income) loss attributable to noncontrolling interests	(857)	(1,158)	2,114	(5,489)
Comprehensive income (loss) attributable to Tanger Factory Outlet Centers, Inc./Operating Partnership	16,195	21,589	(43,393)	99,383
Tanger Properties Limited Partnership [Member]
Net income (loss)	13,719	24,809	(38,290)	105,107
Other comprehensive income (loss):
Foreign currency translation adjustments	1,870	(1,051)	(2,506)	6,341
Change in fair value of cash flow hedges	1,463	(1,011)	(4,711)	(6,576)
Other comprehensive income (loss)	3,333	(2,062)	(7,217)	(235)
Comprehensive income (loss)	17,052	22,747	(45,507)	104,872
Comprehensive (income) loss attributable to noncontrolling interests	0	0	(190)	(195)
Comprehensive income (loss) attributable to Tanger Factory Outlet Centers, Inc./Operating Partnership	$ 17,052	$ 22,747	$ (45,697)	$ 104,677

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Tanger Factory Outlet Centers, Inc. [Member]	Tanger Factory Outlet Centers, Inc. [Member]Common shares [Member]	Tanger Factory Outlet Centers, Inc. [Member]Paid in capital [Member]	Tanger Factory Outlet Centers, Inc. [Member]Accumulated distributions in excess of earnings [Member]	Tanger Factory Outlet Centers, Inc. [Member]Accumulated other comprehensive loss [Member]	Tanger Factory Outlet Centers, Inc. [Member]Total parent equity [Member]	Tanger Factory Outlet Centers, Inc. [Member]Noncontrolling interests [Member]Limited partners [Member]	Tanger Factory Outlet Centers, Inc. [Member]Noncontrolling interests [Member]Other consolidated partnerships [Member]	Tanger Properties Limited Partnership [Member]	Tanger Properties Limited Partnership [Member]Accumulated other comprehensive loss [Member]	Tanger Properties Limited Partnership [Member]Total parent equity [Member]	Tanger Properties Limited Partnership [Member]Noncontrolling interests [Member]	Tanger Properties Limited Partnership [Member]General partner [Member]	Tanger Properties Limited Partnership [Member]Limited partners [Member]
Beginning Balance at Dec. 31, 2018	$ 505,535	$ 939	$ 778,845	$ (272,454)	$ (27,151)	$ 480,179	$ 25,356	$ 0
Beginning Balance at Dec. 31, 2018										$ (28,631)	$ 505,535	$ 0	$ 4,914	$ 529,252
Balance, partners' capital, including portion attributable to noncontrolling interest at Dec. 31, 2018									$ 505,535
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	105,107			99,604		99,604	5,308	195	105,107		104,912	195	1,062	103,850
Other comprehensive income (loss)	(235)				(221)	(221)	(14)		(235)	(235)	(235)
Compensation under Incentive Award Plan	14,657		14,657			14,657			14,657		14,657			14,657
Grant of restricted common share awards, net of forfeitures		3	(3)
Stock Repurchased and Retired During Period, Value	(20,000)	(12)	(19,988)			(20,000)			(20,000)		(20,000)			(20,000)
Withholding of common shares/units for employee income taxes	(1,781)	(1)	(1,780)			(1,781)			(1,781)		(1,781)			(1,781)
Contributions from noncontrolling interests	47							47	47			47
Adjustment for noncontrolling interests in Operating Partnership			137			137	(137)
Common distributions declared									(104,888)		(104,888)		(1,060)	(103,828)
Common dividends declared	(99,631)			(99,631)		(99,631)
Distributions to noncontrolling interests	(5,499)						(5,257)	(242)	(242)			(242)
Ending Balance at Sep. 30, 2019	498,200	929	771,868	(272,481)	(27,372)	472,944	25,256	0
Ending Balance at Sep. 30, 2019										(28,866)	498,200	0	4,916	522,150
Balance, partners' capital, including portion attributable to noncontrolling interest at Sep. 30, 2019									498,200
Beginning Balance at Jun. 30, 2019	516,808	935	778,026	(262,764)	(25,415)	490,782	26,026	0
Beginning Balance at Jun. 30, 2019										(26,804)	516,808	0	5,018	538,594
Balance, partners' capital, including portion attributable to noncontrolling interest at Jun. 30, 2019									516,808
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,809			23,546		23,546	1,263		24,809		24,809		253	24,556
Other comprehensive income (loss)	(2,062)				(1,957)	(1,957)	(105)		(2,062)	(2,062)	(2,062)
Compensation under Incentive Award Plan	3,669		3,669			3,669			3,669		3,669			3,669
Stock Repurchased and Retired During Period, Value	(10,000)	(6)	(9,994)			(10,000)			(10,000)		(10,000)			(10,000)
Increase (Decrease) in Partners' Capital													0	0
Contributions from noncontrolling interests	11							11	11			11
Adjustment for noncontrolling interests in Operating Partnership			167			167	(167)
Common distributions declared									(35,024)		(35,024)		(355)	(34,669)
Common dividends declared	(33,263)			(33,263)		(33,263)
Distributions to noncontrolling interests	(1,772)						(1,761)	(11)	(11)			(11)
Ending Balance at Sep. 30, 2019	498,200	929	771,868	(272,481)	(27,372)	472,944	25,256	0
Ending Balance at Sep. 30, 2019										(28,866)	498,200	0	4,916	522,150
Balance, partners' capital, including portion attributable to noncontrolling interest at Sep. 30, 2019									498,200
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									456,109	(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)	(38,290)			(36,541)		(36,541)	(1,939)	190	(38,290)		(38,480)	190	(391)	(38,089)
Other comprehensive income (loss)	(7,217)				(6,852)	(6,852)	(365)		(7,217)	(7,217)	(7,217)
Compensation under Incentive Award Plan	9,871		9,871			9,871			9,871		9,871			9,871
Grant of restricted common share awards, net of forfeitures		6	(6)
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			(349)			(349)	349
Common distributions declared									(70,062)		(70,062)		(713)	(69,349)
Common dividends declared	(66,563)			(66,563)		(66,563)
Distributions to noncontrolling interests	(3,761)						(3,499)	(262)	(262)			(262)
Ending Balance at Sep. 30, 2020	349,485	935	783,815	(420,367)	(32,347)	332,036	17,449	0
Ending Balance at Sep. 30, 2020									349,485	(34,105)	349,485	0	3,331	380,259
Balance, partners' capital, including portion attributable to noncontrolling interest at Sep. 30, 2020									349,485
Beginning Balance at Jun. 30, 2020	329,983	935	781,485	(433,396)	(35,513)	313,511	16,472	0
Beginning Balance at Jun. 30, 2020										(37,438)	329,983	0	3,192	364,229
Balance, partners' capital, including portion attributable to noncontrolling interest at Jun. 30, 2020									329,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,719			13,029		13,029	690		13,719		13,719		139	13,580
Other comprehensive income (loss)	3,333				3,166	3,166	167		3,333	3,333	3,333
Compensation under Incentive Award Plan	2,450		2,450			2,450			2,450		2,450			2,450
Adjustment for noncontrolling interests in Operating Partnership			(120)			(120)	120
Common distributions declared									0		0			0
Ending Balance at Sep. 30, 2020	$ 349,485	$ 935	$ 783,815	$ (420,367)	$ (32,347)	$ 332,036	$ 17,449	$ 0
Ending Balance at Sep. 30, 2020									349,485	$ (34,105)	$ 349,485	$ 0	$ 3,331	$ 380,259
Balance, partners' capital, including portion attributable to noncontrolling interest at Sep. 30, 2020									$ 349,485

CONSOLIDATED STATEMENT OF SHA_2

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2019
Tanger Factory Outlet Centers, Inc. [Member]
Stock Repurchased During Period, Shares		650,929	1,209,328
Grant of restricted common shares awards, net of forfeitures (in units)			242,167
Forfeitures of restricted common share awards (in shares)	18,996
Shares paid for tax withholding for share based compensation (in shares)			81,284
Common dividends per common share (in dollars per share)		$ 0.355	$ 1.060
Tanger Properties Limited Partnership [Member]
Stock Repurchased During Period, Shares		650,929	1,209,328
Grant of restricted common shares awards, net of forfeitures (in units)			242,167
Forfeitures of restricted common share awards (in shares)	18,996
Shares paid for tax withholding for share based compensation (in shares)			81,284
Common distributions (in dollars per share)		$ 0.355	$ 1.060

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Tanger Factory Outlet Centers, Inc. [Member]
OPERATING ACTIVITIES
Net income (loss)	$ (38,290)	$ 105,107
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	87,966	93,009
Impairment charge	45,675	0
Amortization of deferred financing costs	2,586	2,246
Gain on sale of assets	(2,324)	(43,422)
Equity in (earnings) losses of unconsolidated joint ventures	1,490	(5,604)
Equity-based compensation expense	9,566	14,371
Amortization of debt (premiums) and discounts, net	359	333
Amortization (accretion) of market rent rate adjustments, net	2,560	1,067
Straight-line rent adjustments including write offs due to tenant bankruptcies and uncollectible accounts	2,418	(6,938)
Distributions of cumulative earnings from unconsolidated joint ventures	2,309	5,305
Uncollectible rental revenue allowance	26,573	965
Other non-cash	0	3,638
Changes in other assets and liabilities:
Other assets	(49,822)	(1,303)
Accounts payable and accrued expenses	895	(9,805)
Net cash provided by operating activities	91,961	158,969
INVESTING ACTIVITIES
Additions to rental property	(23,072)	(35,208)
Additions to investments in unconsolidated joint ventures	(5,601)	(2,074)
Net proceeds from sale of assets	7,626	128,505
Additions to non-real estate assets	(1,541)	(819)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	4,717	14,541
Additions to deferred lease costs	(2,755)	(5,207)
Other investing activities	8,339	8,205
Net cash provided by (used in) investing activities	(12,287)	107,943
FINANCING ACTIVITIES
Cash dividends paid	(66,563)	(99,631)
Distributions to noncontrolling interests in Operating Partnership	(3,499)	(5,257)
Proceeds from revolving credit facility	641,630	275,400
Repayments of revolving credit facility	(641,630)	(416,400)
Repayments of notes, mortgages and loans	(2,656)	(2,509)
Repurchase of common shares, including transaction costs	0	(20,000)
Employee income taxes paid related to shares withheld upon vesting of equity awards	(736)	(1,781)
Additions to deferred financing costs	(1,841)	(65)
Proceeds from other financing activities	72	47
Payment for other financing activities	(1,122)	(1,103)
Net cash used in financing activities	(76,345)	(271,299)
Effect of foreign currency rate changes on cash and cash equivalents	(208)	(32)
Net increase (decrease) in cash and cash equivalents	3,121	(4,419)
Cash and cash equivalents, beginning of period	16,672	9,083
Cash and cash equivalents, end of period	19,793	4,664
Tanger Properties Limited Partnership [Member]
OPERATING ACTIVITIES
Net income (loss)	(38,290)	105,107
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	87,966	93,009
Impairment charge	45,675	0
Amortization of deferred financing costs	2,586	2,246
Gain on sale of assets	(2,324)	(43,422)
Equity in (earnings) losses of unconsolidated joint ventures	1,490	(5,604)
Equity-based compensation expense	9,566	14,371
Amortization of debt (premiums) and discounts, net	359	333
Amortization (accretion) of market rent rate adjustments, net	2,560	1,067
Straight-line rent adjustments including write offs due to tenant bankruptcies and uncollectible accounts	2,418	(6,938)
Distributions of cumulative earnings from unconsolidated joint ventures	2,309	5,305
Uncollectible rental revenue allowance	26,573	965
Other non-cash	0	3,638
Changes in other assets and liabilities:
Other assets	(49,899)	(1,318)
Accounts payable and accrued expenses	1,044	(9,788)
Net cash provided by operating activities	92,033	158,971
INVESTING ACTIVITIES
Additions to rental property	(23,072)	(35,208)
Additions to investments in unconsolidated joint ventures	(5,601)	(2,074)
Net proceeds from sale of assets	7,626	128,505
Additions to non-real estate assets	(1,541)	(819)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	4,717	14,541
Additions to deferred lease costs	(2,755)	(5,207)
Other investing activities	8,339	8,205
Net cash provided by (used in) investing activities	(12,287)	107,943
FINANCING ACTIVITIES
Cash dividends paid	(70,062)	(104,888)
Proceeds from revolving credit facility	641,630	275,400
Repayments of revolving credit facility	(641,630)	(416,400)
Repayments of notes, mortgages and loans	(2,656)	(2,509)
Repurchase of common shares, including transaction costs	0	(20,000)
Employee income taxes paid related to shares withheld upon vesting of equity awards	(736)	(1,781)
Additions to deferred financing costs	(1,841)	(65)
Proceeds from other financing activities	72	47
Payment for other financing activities	(1,122)	(1,103)
Net cash used in financing activities	(76,345)	(271,299)
Effect of foreign currency rate changes on cash and cash equivalents	(208)	(32)
Net increase (decrease) in cash and cash equivalents	3,193	(4,417)
Cash and cash equivalents, beginning of period	16,519	8,991
Cash and cash equivalents, end of period	$ 19,712	$ 4,574

Business

Business	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, we owned and operated 31 consolidated outlet centers, with a total gross leasable area of approximately 11.9 million square feet. We also had partial ownership interests in 7 unconsolidated outlet centers totaling approximately 2.2 million square feet, including 3 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	9 Months Ended
	Sep. 30, 2020
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, 2019. The December 31, 2019 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 Historically, our accounts receivable from tenants has not been material; however, given the impacts from the coronavirus (“COVID-19”) pandemic discussed below, our net accounts receivable balance, which is recorded in other assets on the consolidated balance sheet, has increased from approximately $4.8 million at December 31, 2019 to approximately $32.3 million at September 30, 2020. Straight-line rent adjustments recorded as a receivable in other assets on the consolidated balance sheets were approximately $57.6 million and $61.6 million as of September 30, 2020 and December 31, 2019, respectively. Individual leases are assessed for collectability and upon the determination that the collection of rents is not probable, accrued rent and accounts receivable are reduced 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 September 30, 2020. See Note 3 for amounts we recorded as a reduction of revenues for uncollectible accounts. 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 of 2020, we determined that the estimated future undiscounted cash flows of our Foxwoods outlet center, Mashantucket, Connecticut did not exceed the property's carrying value due to a decline in forecasted operating results. Therefore, we recorded a $45.7 million non-cash impairment charge in our consolidated statement of operations which equaled the excess of the property's carrying value over its estimated fair value. See Note 5 for discussion of the impairment of the Saint-Sauveur, Quebec outlet center in our Canadian unconsolidated joint venture during the quarter ended June 30, 2020. 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. For example, the Foxwoods property is part of a casino property and continues to face leasing challenges which could lead to further declines in occupancy, rental revenues and cash flows in the future. Such challenges could result in additional impairments. We can provide no assurance that material impairment charges with respect to our properties will not occur during the fourth quarter of 2020 or future periods.

COVID-19 Pandemic

COVID-19 Pandemic	9 Months Ended
	Sep. 30, 2020
Risks and Uncertainties [Abstract]
COVID-19 Pandemic	COVID-19 Pandemic The current novel COVID-19 pandemic 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. Although our outlet centers remained open, retailers began closing their stores in our outlet centers in mid-March and by April 6, 2020, substantially all of the stores in our portfolio were closed as a result of mandates by order of local and state authorities. By June 15, 2020, in store shopping for non-essential retail was allowed in every market in which our centers are located. Our outlet centers may experience additional short-term store closures as retailers implement additional safety protocols at specific locations impacted by increased exposure to COVID-19. While our outlet centers have not closed throughout the pandemic, we have been operating under reduced hours since late April when the first stores began to reopen. Prior to the pandemic, our outlet centers operated an average of 12 hours per day. Upon reopening, our centers were open on an average of 8 hours per day. A number of our tenants have 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. The following table sets forth information regarding the status of rents billed during the third and second quarters as of September 30, 2020 (In thousands): As of September 30, 2020 Third Quarter Second Quarter Collection Status: (1) Rents Billed % of Rents Rents Billed % of Rents Rents collected $ 82,006 86 % $ 40,995 42 % Rents expected to be collected (2) 5,379 6 5,012 5 Rents deferred (3) 618 1 25,327 26 Under negotiation 1,589 2 2,739 3 One-time rent concessions in exchange for amendments to lease structure 1,544 2 13,176 13 Bankruptcy related, primarily pre-petition rents 2,258 2 8,719 9 At risk due to tenant financial weakness 1,407 1 1,540 2 Total rents billed $ 94,801 100 % $ 97,508 100 % (1) Excludes v ariable revenue which is derived from tenant sales and lease termination fees. (2) In October 2020, we collected and additional $2.3 million of the third quarter rents and $968,000 of the second quarter rents. (3) Includes rents deferred with substantially all payments due in 2021, for which the majority is due in January/February of 2021. During the three months ended September 30, 2020, we wrote off 5% of third quarter rents billed, related to tenant bankruptcies, other uncollectible accounts due to financial weakness and one-time concessions in exchange for landlord-favorable amendments to lease structure. During the nine months ended September 30, 2020, we wrote off approximately 15% of second and third quarter rents, related to bankruptcies, other uncollectible accounts due to financial weakness and one-time concessions in exchange for landlord-favorable amendments to lease structure. In addition, for the three and nine months ended September 30, 2020, we recorded a $2.2 million and $11.8 million reserve, respectively, for a portion of deferred and under negotiation billings that are expected to become uncollectible in future periods. Further, for the three and nine months ended September 30, 2020 we recognized a write-off of revenue of approximately $2.4 million and $6.1 million of straight-line rents, respectively, associated with the tenant bankruptcies and uncollectible accounts. We are closely monitoring changes in the collectability assessment of our tenant receivables as a result of certain tenants suffering adverse financial consequences due to COVID-19 and should our estimates change, there could be material modifications to our revenues in future periods. Given the economic environment as a result of COVID-19, a select number of our tenants underwent liquidity hardships and filed for Chapter 11 bankruptcy protection in the second and third quarters of 2020. Although some of these tenants intend to exit the Chapter 11 bankruptcy process and resume operations, the outcomes of such proceedings are unknown and we are currently exploring leasing alternatives for stores we expect to close. Recent Chapter 11 bankruptcy filings include, but not limited to, J. Crew Group, Inc. (filed in May 2020) and Brooks Brothers, Lucky Brand Jeans, New York and Company and Ascena Retail Group, Inc. (all filed in July, 2020). Approximately 89% of the amounts included in the table above under the caption (“Bankruptcy related, primarily pre-petition rents”) that were written off during the second and third quarter as uncollectible rents as of September 30, 2020 were related to these tenants. In March 2020, to increase liquidity, preserve financial flexibility and help meet our obligations for a sustained period of time, we drew down substantially all of the available capacity under our $600.0 million unsecured lines of credit. Beginning in June 2020 through August 2020, we repaid the entire $599.8 million outstanding balance bringing the outstanding balance to zero as of September 30, 2020. We also took steps to reduce cash outflows, including the reduction or deferral of certain operating costs, temporary base salary reductions for our named executive officers and other employees, and the reduction of certain other general and administrative expenses. During the second and third quarters, these reductions reduced cash outflows by approximately $15.4 million, including $1.9 million of general and administrative and $13.5 million of property operating expenses. In July 2020, we restored the above mentioned salary reductions.

Disposition of Properties

Disposition of Properties	9 Months Ended
	Sep. 30, 2020
Disposition of Properties [Abstract]
Disposition of Properties	Disposition of Properties Disposition of Properties During the three and nine months ended September 30, 2020, we closed on the sale of a non-core outlet center in Terrell, Texas for gross proceeds of $8.0 million. During the nine months ended September 30, 2019, we closed on the sale of four non-core outlet centers for total gross proceeds of $130.5 million. The following table sets forth certain summarized information regarding properties and land outparcels sold during the nine months ended September 30, 2020 and September 30, 2019: Property Location Date Sold Square Feet Net Sales Proceeds Gain on Sale (in 000’s) 2020 Dispositions: Terrell Terrell, Texas August 2020 178 $ 7,626 $ 2,324 2019 Dispositions: Nags Head, Ocean City, Park City, and Williamsburg Nags Head, NC, Ocean City, MD, Park City, UT, and Williamsburg, IA March 2019 878 $ 128,248 $ 43,422 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 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: RioCan Canada Various 50.0 % 765 $ 92.5 $ — $ 92.5 Investments included in other liabilities: Columbus (2) Columbus, OH 50.0 % 355 $ (3.6) $ 85.0 Charlotte (2) Charlotte, NC 50.0 % 399 (13.1) 99.6 National Harbor (2) National Harbor, MD 50.0 % 341 (8.7) 94.5 Galveston/Houston (2) Texas City, TX 50.0 % 353 (19.8) 79.9 $ (45.2) As of December 31, 2019 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: RioCan Canada Various 50.0 % 764 $ 94.7 $ 9.2 $ 94.7 Investments included in other liabilities: Columbus (2) Columbus, OH 50.0 % 355 $ (3.5) $ 85.0 Charlotte (2) Charlotte, NC 50.0 % 399 (13.0) 99.5 National Harbor (2) National Harbor, MD 50.0 % 341 (5.9) 94.4 Galveston/Houston (2) Texas City, TX 50.0 % 353 (19.7) 79.9 $ (42.1) (1) Net of debt origination costs of $1.1 million as of September 30, 2020 and net of debt origination cost and including premiums of $1.1 million as of December 31, 2019. (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 Nine months ended September 30, September 30, 2020 2019 2020 2019 Fee: Management and marketing $ 471 $ 567 $ 1,156 $ 1,696 Leasing and other fees 15 32 50 71 Expense reimbursements from unconsolidated joint ventures 708 757 2,156 2,176 Total Fees $ 1,194 $ 1,356 $ 3,362 $ 3,943 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 $3.6 million and $3.8 million as of September 30, 2020 and December 31, 2019, respectively) are amortized over the various useful lives of the related assets. Galveston/Houston In June 2020, in response to the COVID-19 impact on the property, the Galveston/Houston joint venture amended its mortgage loan. The loan modification amended the first one-year extension option to provide for two six-month options (the “First Extension” and “Second Extension”, respectively). Under the loan modification, the joint venture is prohibited from making partner distributions during the term of the First Extension. If the joint venture exercises all available options, the loan would mature in July 2022. The joint venture exercised its First Extension option to extend the mortgage loan for six months to January 2021. RioCan Canada In May 2020, the joint venture’s mortgage loan for the outlet center in Saint-Sauveur matured and the joint venture repaid the approximately $8.3 million owed in full. During June 2020, the Rio-Can joint venture recognized an impairment charge related to its Saint-Sauveur property in Quebec. The impairment charge was primarily driven by deterioration of net operating income caused by market competition and the COVID-19 pandemic. The table below summarizes the impairment charge taken during the second quarter of 2020 (in thousands): Impairment Charge (1) Outlet Center Total Our Share 2020 Saint-Sauveur $ 6,181 $ 3,091 (1) The fair value was determined using an income approach considering the prevailing market income capitalization rates for similar assets. Condensed combined summary financial information of unconsolidated joint ventures accounted for using the equity method is as follows (in thousands): Condensed Combined Balance Sheets - Unconsolidated Joint Ventures September 30, 2020 December 31, 2019 Assets Land $ 88,312 $ 90,859 Buildings, improvements and fixtures 461,593 477,061 Construction in progress 4,801 4,779 554,706 572,699 Accumulated depreciation (138,622) (132,860) Total rental property, net 416,084 439,839 Cash and cash equivalents 16,515 19,750 Deferred lease costs and other intangibles, net 5,134 6,772 Prepaids and other assets 24,355 17,789 Total assets $ 462,088 $ 484,150 Liabilities and Owners’ Equity Mortgages payable, net $ 358,940 $ 368,032 Accounts payable and other liabilities 15,911 17,173 Total liabilities 374,851 385,205 Owners’ equity 87,237 98,945 Total liabilities and owners’ equity $ 462,088 $ 484,150 Three months ended Nine months ended Condensed Combined Statements of Operations September 30, September 30, - Unconsolidated Joint Ventures 2020 2019 2020 2019 Revenues $ 16,959 $ 23,050 $ 55,470 $ 70,088 Expenses: Property operating 8,035 8,380 24,023 27,780 General and administrative 82 19 344 171 Asset impairment — — 6,181 — Depreciation and amortization 5,877 6,051 17,686 18,478 Total expenses 13,994 14,450 48,234 46,429 Other income (expense): Interest expense (3,024) (4,059) (9,991) (12,331) Other income 104 179 165 305 Total other income (expense) (2,920) (3,880) $ (9,826) $ (12,026) Net income (loss) $ 45 $ 4,720 $ (2,590) $ 11,633 The Company and Operating Partnership’s share of: Net income (loss) $ (42) $ 2,329 $ (1,490) $ 5,604 Depreciation and amortization (real estate related) $ 3,003 $ 3,058 $ 9,038 $ 9,453

Debt Guaranteed by the Company

Debt Guaranteed by the Company	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 December 31, 2019 Unsecured lines of credit $ — $ — Unsecured term loan $ 350,000 $ 350,000

Debt of the Operating Partnersh

Debt of the Operating Partnership	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 December 31, 2019 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 $ 247,801 $ 250,000 $ 247,308 Senior notes 3.750 % December 2024 250,000 248,401 250,000 248,127 Senior notes 3.125 % September 2026 350,000 346,630 350,000 346,215 Senior notes 3.875 % July 2027 300,000 297,248 300,000 296,953 Mortgages payable: Atlantic City (2)(3) 5.14 % - 7.65% November 2021- December 2026 28,253 29,578 30,909 32,531 Southaven LIBOR + 1.80% April 2021 51,400 51,346 51,400 51,272 Unsecured term loan LIBOR (4) + 1.00% April 2024 350,000 347,213 350,000 347,367 Unsecured lines of credit LIBOR (4) + 1.00% October 2021 (5) — — — — $ 1,579,653 $ 1,568,217 $ 1,582,309 $ 1,569,773 (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) 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. (5) 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 $165.5 million at September 30, 2020, 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 September 30, 2020, the maximum amount of unconsolidated joint venture debt guaranteed by the Company was $16.4 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 September 30, 2020, we believe we were in compliance with all of our debt covenants. Lines of credit and Term Loan Covenant Modifications In June 2020, we amended the debt agreements for our lines of credit and bank term loan, primarily to improve future covenant flexibility. The amendments, among other things, allow us to access the existing surge leverage provision, which provides for an increase to the maximum thresholds to 65% from 60% for total leverage and unsecured leverage, for twelve months starting July 1, 2020, during which time share repurchases are prohibited. Additionally, the leverage covenants are determined based on the calculation period which is modified to be based on the immediately preceding three calendar month period annualized for the calculation date occurring on December 31, 2020; the immediately preceding six calendar month period annualized for the calculation date occurring on March 31, 2021; the immediately preceding nine calendar month period annualized for the calculation date occurring on June 30, 2021; and for all other calculation dates occurring during the term on the agreement, the immediately preceding twelve calendar month period. Some definitional modifications related to the calculation of certain covenants are permanent, including the netting of cash balances in excess of $30.0 million (or debt maturing in the next 24 months, if less) as well as using adjusted EBITDA, which adds back general and administrative expenses not attributable to the subsidiaries or properties and deducts a management fee of 3% of rental revenues in liability and asset calculations for certain covenants. The amendments revised the interest rate to provide a LIBOR floor of 0.25% for the portions of the lines of credit and bank term loan that are not fixed with an interest rate swap. Although the amended covenants provide additional flexibility and we expect to remain in compliance with such covenants, the potential impacts from COVID-19 are highly uncertain and therefore could impact covenant compliance in the future. Unsecured Lines of Credit In March 2020, in response to the COVID-19 pandemic, we drew down approximately $599.8 million under our unsecured lines of credit to increase liquidity and preserve financial flexibility to help ensure that we are able to meet our obligations for a sustained period. Beginning in June 2020 through August 2020, we repaid the entire $599.8 million outstanding balance bringing the outstanding balance to zero as of September 30, 2020. Interest Rate Spread over LIBOR In February 2020, due to a change in our credit rating, our interest rate spread over LIBOR on our $600.0 million unsecured line of credit facility increased from 0.875% to 1.0% and our annual facility fee increased from 0.15% to 0.20%. In addition, our interest rate spread over LIBOR on our $350.0 million unsecured term loan increased from 0.90% to 1.0%. Debt Maturities Maturities of the existing long-term debt as of September 30, 2020 for the next five years and thereafter are as follows (in thousands): Calendar Year Amount For the remainder of 2020 $ 910 2021 57,193 2022 4,436 2023 254,768 2024 605,140 Thereafter 657,206 Subtotal 1,579,653 Net discount and debt origination costs (11,436) Total $ 1,568,217 Given the financial implications of COVID-19, 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 December 31, 2019 Assets (Liabilities) (1) : Interest rate swaps: April 13, 2016 January 1, 2021 175,000 1 month LIBOR 1.03 % $ (411) $ 1,018 March 1, 2018 January 31, 2021 40,000 1 month LIBOR 2.47 % (311) (376) August 14, 2018 January 1, 2021 150,000 1 month LIBOR 2.20 % (817) (896) July 1, 2019 February 1, 2024 25,000 1 month LIBOR 1.75 % (1,314) (170) January 1, 2021 February 1, 2024 150,000 1 month LIBOR 0.60 % (2,043) — January 1, 2021 February 1, 2024 $ 100,000 1 month LIBOR 0.22 % $ (238) — Total $ 640,000 $ (5,134) $ (424) (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 September 30, Nine months ended September 30, 2020 2019 2020 2019 Interest Rate Swaps: Amount of loss recognized in other comprehensive income (loss) on derivative $ 1,463 $ (1,011) $ (4,711) $ (6,576)

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020: Assets: Short-term government securities ( cash and cash equivalents) $ 20,626 $ 20,626 $ — $ — Total assets $ 20,626 $ 20,626 $ — $ — Liabilities: Interest rate swaps (other liabilities) $ 5,134 $ — $ 5,134 $ — Total liabilities $ 5,134 $ — $ 5,134 $ — 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, 2019: Asset: Interest rate swaps (prepaids and other assets) $ 1,018 $ — $ 1,018 $ — Total assets $ 1,018 $ — $ 1,018 $ — Liabilities: Interest rate swaps (other liabilities) $ 1,442 $ — $ 1,442 $ — Total liabilities $ 1,442 $ — $ 1,442 $ — 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. 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): September 30, 2020 December 31, 2019 Level 1 Quoted Prices in Active Markets for Identical Assets or Liabilities $ — $ — Level 2 Significant Observable Inputs 1,133,864 1,169,481 Level 3 Significant Unobservable Inputs 431,285 434,333 Total fair value of debt $ 1,565,149 $ 1,603,814 Recorded value of debt $ 1,568,217 $ 1,569,773 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.

Shareholders' Equity of the Com

Shareholders' Equity of the Company	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Shareholders' Equity of the Company	Shareholders’ Equity of the Company Dividend Declaration 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. In January 2019, the Company's Board of Directors declared a $0.35 cash dividend per common which was paid during the first quarter of 2019, to each shareholder of record on January 31, 2019, and the Trustees of Tanger GP Trust declared a $0.35 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders. In February 2019, the Company's Board of Directors declared a $0.355 cash dividend per common share payable on May 15, 2019 to each shareholder of record on April 30, 2019, and the Trustees of Tanger GP Trust declared a $0.355 cash distribution per Operating Partnership unit to the Operating Partnership's unitholders. A liability in the amount of approximately $35.2 million was recorded in accounts payable and accrued expenses in the consolidated balance sheet as of March 31, 2019. Share Repurchase Program In February 2019, the Company’s Board of Directors authorized the repurchase of an additional $44.3 million of our outstanding common shares for an aggregate authorization of $169.3 million until May 2021. Repurchases may be made from time to time through open market, privately-negotiated, structured or derivative transactions (including accelerated share repurchase transactions), or other methods of acquiring shares. The Company intends to structure open market purchases to occur within pricing and volume requirements of Rule 10b-18. The Company may, from time to time, enter into Rule 10b5-1 plans to facilitate the repurchase of its shares under this authorization. The Company did not repurchase any shares for the periods ended September 30, 2020. The remaining amount authorized to be repurchased under the program as of September 30, 2020 was approximately $80.0 million. The Company has temporarily suspended share repurchases for at least the twelve months starting July 1, 2020 as the June 2020 amendments to our debt agreements for our lines of credit and bank term loan prohibit share repurchases during such time and in order to preserve our liquidity position. Shares repurchased were follows: Three months ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Total number of shares purchased — 650,929 — 1,209,328 Average price paid per share $ — $ 15.34 $ — $ 16.52 Total price paid exclusive of commissions and related fees (in thousands) $ — $ 9,987 $ — $ 19,976

Partners' Equity of the Operati

Partners' Equity of the Operating Partnership	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020 and September 30, 2019: Limited Partnership Units General Partnership Units Class A Class B Total Balance June 30, 2019 1,000,000 4,960,684 92,544,267 97,504,951 Repurchase of units — — (650,929) (650,929) Balance September 30, 2019 1,000,000 4,960,684 91,893,338 96,854,022 Balance December 31, 2018 1,000,000 4,960,684 92,941,783 97,902,467 Grant of restricted common share awards by the Company, net of forfeitures — — 242,167 242,167 Repurchase of units — — (1,209,328) (1,209,328) Units withheld for employee income taxes — — (81,284) (81,284) Balance September 30, 2019 1,000,000 4,960,684 91,893,338 96,854,022 Balance June 30, 2020 1,000,000 4,911,173 92,472,267 97,383,440 Forfeitures of restricted common share awards — — (18,996) (18,996) Balance September 30, 2020 1,000,000 4,911,173 92,453,271 97,364,444 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 — — 611,350 611,350 Issuance of deferred units — — 6,258 6,258 Units withheld for employee income taxes — — (56,597) (56,597) Balance September 30, 2020 1,000,000 4,911,173 92,453,271 97,364,444

Earnings Per Share of the Compa

Earnings Per Share of the Company	9 Months Ended
	Sep. 30, 2020
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 September 30, Nine months ended September 30, 2020 2019 2020 2019 Numerator: Net income (loss) attributable to Tanger Factory Outlet Centers, Inc. $ 13,029 $ 23,546 $ (36,541) $ 99,604 Less allocation of earnings to participating securities (146) (305) (692) (1,030) Net income (loss) available to common shareholders of Tanger Factory Outlet Centers, Inc. $ 12,883 $ 23,241 $ (37,233) $ 98,574 Denominator: Basic weighted average common shares 92,649 92,514 92,596 92,999 Diluted weighted average common shares 92,649 92,514 92,596 92,999 Basic earnings per common share: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06 Diluted earnings per common share: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06 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 both the three and nine months ended September 30, 2020, 1.7 million notional units were excluded from the computation and for both the three and nine months ended September 30, 2019, approximately 1.1 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 both the three and nine months ended September 30, 2020, 1.8 million options were excluded from the computation, as they were anti-dilutive. For both the three and nine months ended September 30, 2019 approximately 524,000 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	9 Months Ended
	Sep. 30, 2020
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 September 30, Nine months ended September 30, 2020 2019 2020 2019 Numerator: Net income (loss) attributable to partners of the Operating Partnership $ 13,719 $ 24,809 $ (38,480) $ 104,912 Less allocation of earnings to participating securities (147) (305) (692) (1,030) Net income (loss) available to common unitholders of the Operating Partnership $ 13,572 $ 24,504 $ (39,172) $ 103,882 Denominator: Basic weighted average common units 97,560 97,474 97,507 97,959 Diluted weighted average common units 97,560 97,474 97,507 97,959 Basic earnings per common unit: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06 Diluted earnings per common unit: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06 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 and nine months ended September 30, 2020 and 2019. 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 both the three and nine months ended September 30, 2020 1.7 million notional units were excluded from the computation and for both the three and nine months ended September 30, 2019 approximately 1.1 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 both the three and nine months ended September 30, 2020, 1.8 million options were excluded from the computation. For both the three and nine months ended September 30, 2019, approximately 524,000 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	9 Months Ended
	Sep. 30, 2020
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 Nine months ended September 30, September 30, 2020 2019 2020 2019 Restricted common shares (1) $ 1,610 $ 2,084 $ 5,731 $ 9,224 Notional unit performance awards (1) 624 1,446 3,606 5,021 Options 113 45 229 126 Total equity-based compensation $ 2,347 $ 3,575 $ 9,566 $ 14,371 (1) The nine months ended September 30, 2019 includes the accelerated recognition of compensation cost related to the planned retirement of an executive officer. Equity-based compensation expense capitalized as a part of rental property and deferred lease costs were as follows (in thousands): Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Equity-based compensation expense capitalized $ 103 $ 94 $ 305 $ 286 Option Awards In September 2020, the Company granted 334,500 options to non-executive employees of the Company. The exercise price of the options granted during the third quarter was $5.73 per share which equaled the closing market price of the Company's common shares on the day prior to the grant date. The options expire 10 years years from the date of grant and 20% of the options become exercisable in each of the first 5 years years commencing one year year from the date of grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model, which resulted in a weighted average grant date fair value per share of $1.03 and included the following weighted-average assumptions: expected dividend yield 4.93%; expected life of 6.5 years; expected volatility of 34.39%; a risk-free rate of 0.48%; and forfeiture rate of 7.2% dependent upon the employee's position within the Company. In April 2020, Stephen Yalof became the President and Chief Operating Officer of the Company. As part of his employment, Mr. Yalof was granted 1.0 million options that have an exercise price of $7.15 per share, which equaled the closing market price of a common share of the Company on the day prior to the grant date. The options expire 10 years from the date of grant and 25% of the options become exercisable on December 31, 2020 with the remaining options vesting ratably on each December 31st through 2023, in each case, contingent upon continued employment with the Company through the applicable vesting date (subject to acceleration upon certain terminations of employment). The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model, which resulted in a weighted average grant date fair value per share of $0.42 and included the following weighted-average assumptions: expected dividend yield 9.86%; expected life of 7.9 years; expected volatility of 30%; a risk-free rate of 0.60%; and forfeiture rate 0.0%. Restricted Common Share and Restricted Share Unit Awards During February 2020, the Company granted approximately 399,000 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 ranged from $12.03 to $13.75 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. For the restricted shares units issued to our Chief Executive Officer, the award agreements require him to hold shares or units issued to him for a minimum of three years following vesting or the share issuance date, as applicable. Compensation expense related to the amortization of the deferred compensation is being recognized in accordance with the vesting schedule of the restricted shares. Also in April 2020, Mr. Yalof was granted 389,308 restricted common shares with a grant date fair value of $7.15 per share. The restricted common shares vest ratably over a three year period, with one-third of the restricted common shares vesting on each anniversary of the grant date, beginning on April 10, 2021, contingent upon continued employment with the Company through the applicable vesting date (subject to acceleration upon certain terminations of employment). 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 57,000 and 81,000 for the nine months ended September 30, 2020 and 2019, 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 $736,000 and $1.8 million for the nine months ended September 30, 2020 and 2019, respectively. These amounts are reflected as financing activities within the consolidated statements of cash flows. 2020 Outperformance Plan During February 2020, the Compensation Committee of the Company approved the general terms of the Tanger Factory Outlet Centers, Inc. 2020 Outperformance Plan (the “2020 OPP”) covering the Company's senior executive officers whereby a maximum of approximately 697,000 restricted common shares may be earned if certain share price appreciation goals are achieved over a three year measurement period. The 2020 OPP 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, with respect to our Chief Executive Officer, retirement or (c) due to death or disability). The following table sets forth 2020 OPP performance targets and other relevant information about the 2020 OPP: Performance targets (1) Absolute portion of award: Percent of total award 33.3% Absolute total shareholder return range 36.8 % - 52.1% 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) 902,167 February grant date fair value per share $ 7.30 April grant date fair value per share (3) $ 3.11 (1) The number of restricted common shares received under the 2020 OPP will be determined on a pro-rata basis by linear interpolation between total shareholder return thresholds, both for absolute total shareholder return and for relative total shareholder return amongst the Company’s peer group. (2) The peer group is based on companies included in the FTSE NAREIT Retail Index. (3) In April 2020, Mr. Yalof was awarded 205,480 notional units under the 2020 OPP. These awards have the same terms as the awards our executive officers received in February 2020. The fair values of the 2020 OPP awards granted during the nine months ended September 30, 2020 were determined at the grant dates using a Monte Carlo simulation pricing model and the following assumptions: Risk free interest rate (1) 1.4 % Expected dividend yield (2) 8.4 % Expected volatility (3) 29 % (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 Comprehensive

Accumulated Other Comprehensive Income (Loss) of the Company	9 Months Ended
	Sep. 30, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) of the Company	Accumulated Other Comprehensive Income (Loss) of the Company The following table presents changes in the balances of each component of accumulated comprehensive loss for the three and nine months ended September 30, 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 June 30, 2020 $ (29,249) $ (6,264) $ (35,513) $ (1,590) $ (335) $ (1,925) Other comprehensive income (loss) before reclassifications 1,776 (42) 1,734 94 (3) 91 Reclassification out of accumulated other comprehensive income/loss into interest expense — 1,432 1,432 — 76 76 Balance September 30, 2020 $ (27,473) $ (4,874) $ (32,347) $ (1,496) $ (262) $ (1,758) 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 (2,379) (6,995) (9,374) (127) (372) (499) Reclassification out of accumulated other comprehensive income/loss into interest expense — 2,522 2,522 — 134 134 Balance September 30, 2020 $ (27,473) $ (4,874) $ (32,347) $ (1,496) $ (262) $ (1,758) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three and nine months ended September 30, 2019 (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 June 30, 2019 $ (25,591) $ 176 $ (25,415) $ (1,397) $ 8 $ (1,389) Other comprehensive loss before reclassifications (998) (447) (1,445) (53) (25) (78) Reclassification out of accumulated other comprehensive income/loss into other income (expense) for interest expense for cash flow hedges — (512) (512) — (27) (27) Balance September 30, 2019 $ (26,589) $ (783) $ (27,372) $ (1,450) $ (44) $ (1,494) 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, 2018 $ (32,610) $ 5,459 $ (27,151) $ (1,770) $ 290 $ (1,480) Other comprehensive income (loss) before reclassifications 2,567 (4,296) (1,729) 136 (230) (94) Reclassification out of accumulated other comprehensive income/loss for foreign currency and interest expense for cash flow hedges 3,454 (1,946) 1,508 184 (104) 80 Balance September 30, 2019 $ (26,589) $ (783) $ (27,372) $ (1,450) $ (44) $ (1,494) We expect within the next twelve months to reclassify into earnings as an increase to interest expense approximately $2.3 million of the amounts recorded within accumulated other comprehensive loss related to the interest rate swap agreements in effect as of September 30, 2020.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership	9 Months Ended
	Sep. 30, 2020
Tanger Properties Limited Partnership [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership	Accumulated Other Comprehensive Income (Loss) of the Operating Partnership The following table presents changes in the balances of each component of accumulated comprehensive loss for the three and nine months ended September 30, 2020 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance June 30, 2020 $ (30,839) $ (6,599) $ (37,438) Other comprehensive income (loss) before reclassifications 1,870 (45) 1,825 Reclassification out of accumulated other comprehensive income (loss) into interest expense for cash flow hedges — 1,508 1,508 Balance September 30, 2020 $ (28,969) $ (5,136) $ (34,105) Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2019 $ (26,463) $ (425) $ (26,888) Other comprehensive loss before reclassifications (2,506) (7,367) (9,873) Reclassification out of accumulated other comprehensive income (loss) into interest expense — 2,656 2,656 Balance September 30, 2020 $ (28,969) $ (5,136) $ (34,105) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three and nine months ended September 30, 2019 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance June 30, 2019 $ (26,988) $ 184 $ (26,804) Other comprehensive loss before reclassifications (1,051) (472) (1,523) Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for interest expense for cash flow hedges — (539) (539) Balance September 30, 2019 $ (28,039) $ (827) $ (28,866) Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2018 $ (34,380) $ 5,749 $ (28,631) Other comprehensive income (loss) before reclassifications 2,703 (4,526) (1,823) Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges 3,638 (2,050) 1,588 Balance September 30, 2019 $ (28,039) $ (827) $ (28,866) We expect within the next twelve months to reclassify into earnings as an increase to interest expense approximately $2.3 million of the amounts recorded within accumulated other comprehensive loss related to the interest rate swap agreements in effect as of September 30, 2020.

Leasing Agreements

Leasing Agreements	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leasing Agreements	As of September 30, 2020, we were the lessor to over 2,200 stores in our 31 consolidated outlet centers, under operating leases with initial terms that expire from 2020 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 Nine months ended September 30, September 30, 2020 2019 2020 2019 Rental revenues - fixed $ 78,312 $ 89,055 $ 213,760 $ 272,482 Rental revenues - variable (1) 21,939 25,995 57,322 74,907 Rental revenues $ 100,251 $ 115,050 $ 271,082 $ 347,389 (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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 September 30, 2019 Costs relating to construction included in accounts payable and accrued expenses $ 21,416 $ 18,417 Interest paid, net of interest capitalized was as follows (in thousands): Nine months ended September 30, 2020 2019 Interest paid $ 44,990 $ 44,231

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Recently issued accounting standards On 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. We have not adopted any of the optional expedients or exceptions through September 30, 2020, but will continue to evaluate the possible adoption of any such expedients or exceptions during the effective period as circumstances evolve. Recently adopted accounting standards In April 2020, the Financial Accounting Standards Board (“FASB”) staff issued a question and answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under existing accounting lease guidance under ASC 842, the Company would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A allows the Company, if certain criteria have been met, to bypass the lease by lease analysis, and instead make an accounting policy election to account for COVID-19 related lease concessions as either a lease modification or a negative variable adjustment to rental revenue. The Lease Modification Q&A allows the Company to determine accounting policy elections at a disaggregated level, and the elections should be applied consistently by either the type of concession or another reasonable disaggregated level. We have evaluated and elected to apply the Lease Modification Q&A to eligible lease concessions. We applied modification accounting to individual leases that are in bankruptcy and those that did not qualify for the concession. As a result, for leases not treated as a lease modification we have made the following policy elections by the type of concession agreed to with the respective tenant. Rent Deferrals We will account for rental deferrals using the receivables model as described within the Lease Modification Q&A. Under the receivables model, we will continue to recognize lease revenue in a manner that is unchanged from the original lease agreement and continue to recognize lease receivables and rental revenue during the deferral period. Rent Abatements We will account for rental abatements as negative variable adjustments to rental revenue as described within the Lease Modification Q&A. We will recognize negative variable rent for the current period reduction of rental revenue associated with any lease concessions we provide. See Notes 2 and 3, for additional details on the impact of the Lease Modification Q&A on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. ASU 2018-13 is intended to improve the effectiveness of disclosures required by entities regarding recurring and nonrecurring fair value measurements. ASU 2018-13 is effective for reporting periods beginning after December 15, 2019, with early adoption permitted. The adoption of ASU 2018-13 did not have a material impact on our consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13 to amend the accounting for credit losses for certain financial instruments. Under the new guidance, an entity recognizes its estimate of expected credit losses as an allowance, which the FASB believes will result in more timely recognition of such losses. In November 2018, the FASB released ASU No. 2018-19 “Codification Improvements to Topic 326, Financial Instruments - Credit Losses.” This ASU clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 “Financial Instruments - Credit Losses.” Instead, impairment of receivables arising from operating leases should be accounted for under Subtopic 842-30 “Leases - Lessor.” ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The adoption of this new guidance did not have a material impact on our consolidated financial statements.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Accounting	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, 2019. The December 31, 2019 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	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 of 2020, we determined that the estimated future undiscounted cash flows of our Foxwoods outlet center, Mashantucket, Connecticut did not exceed the property's carrying value due to a decline in forecasted operating results. Therefore, we recorded a $45.7 million non-cash impairment charge in our consolidated statement of operations which equaled the excess of the property's carrying value over its estimated fair value. See Note 5 for discussion of the impairment of the Saint-Sauveur, Quebec outlet center in our Canadian unconsolidated joint venture during the quarter ended June 30, 2020. 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. For example, the Foxwoods property is part of a casino property and continues to face leasing challenges which could lead to further declines in occupancy, rental revenues and cash flows in the future. Such challenges could result in additional impairments. We can provide no assurance that material impairment charges with respect to our properties will not occur during the fourth quarter of 2020 or future periods.
New Accounting Pronouncements	Recently issued accounting standards On 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. We have not adopted any of the optional expedients or exceptions through September 30, 2020, but will continue to evaluate the possible adoption of any such expedients or exceptions during the effective period as circumstances evolve. Recently adopted accounting standards In April 2020, the Financial Accounting Standards Board (“FASB”) staff issued a question and answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under existing accounting lease guidance under ASC 842, the Company would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A allows the Company, if certain criteria have been met, to bypass the lease by lease analysis, and instead make an accounting policy election to account for COVID-19 related lease concessions as either a lease modification or a negative variable adjustment to rental revenue. The Lease Modification Q&A allows the Company to determine accounting policy elections at a disaggregated level, and the elections should be applied consistently by either the type of concession or another reasonable disaggregated level. We have evaluated and elected to apply the Lease Modification Q&A to eligible lease concessions. We applied modification accounting to individual leases that are in bankruptcy and those that did not qualify for the concession. As a result, for leases not treated as a lease modification we have made the following policy elections by the type of concession agreed to with the respective tenant. Rent Deferrals We will account for rental deferrals using the receivables model as described within the Lease Modification Q&A. Under the receivables model, we will continue to recognize lease revenue in a manner that is unchanged from the original lease agreement and continue to recognize lease receivables and rental revenue during the deferral period. Rent Abatements We will account for rental abatements as negative variable adjustments to rental revenue as described within the Lease Modification Q&A. We will recognize negative variable rent for the current period reduction of rental revenue associated with any lease concessions we provide. See Notes 2 and 3, for additional details on the impact of the Lease Modification Q&A on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. ASU 2018-13 is intended to improve the effectiveness of disclosures required by entities regarding recurring and nonrecurring fair value measurements. ASU 2018-13 is effective for reporting periods beginning after December 15, 2019, with early adoption permitted. The adoption of ASU 2018-13 did not have a material impact on our consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13 to amend the accounting for credit losses for certain financial instruments. Under the new guidance, an entity recognizes its estimate of expected credit losses as an allowance, which the FASB believes will result in more timely recognition of such losses. In November 2018, the FASB released ASU No. 2018-19 “Codification Improvements to Topic 326, Financial Instruments - Credit Losses.” This ASU clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 “Financial Instruments - Credit Losses.” Instead, impairment of receivables arising from operating leases should be accounted for under Subtopic 842-30 “Leases - Lessor.” ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The adoption of this new guidance did not have a material impact on our consolidated financial statements.

COVID-19 Pandemic (Tables)

COVID-19 Pandemic (Tables)	9 Months Ended
	Sep. 30, 2020
Risks and Uncertainties [Abstract]
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	The following table sets forth information regarding the status of rents billed during the third and second quarters as of September 30, 2020 (In thousands): As of September 30, 2020 Third Quarter Second Quarter Collection Status: (1) Rents Billed % of Rents Rents Billed % of Rents Rents collected $ 82,006 86 % $ 40,995 42 % Rents expected to be collected (2) 5,379 6 5,012 5 Rents deferred (3) 618 1 25,327 26 Under negotiation 1,589 2 2,739 3 One-time rent concessions in exchange for amendments to lease structure 1,544 2 13,176 13 Bankruptcy related, primarily pre-petition rents 2,258 2 8,719 9 At risk due to tenant financial weakness 1,407 1 1,540 2 Total rents billed $ 94,801 100 % $ 97,508 100 % (1) Excludes v ariable revenue which is derived from tenant sales and lease termination fees. (2) In October 2020, we collected and additional $2.3 million of the third quarter rents and $968,000 of the second quarter rents. (3) Includes rents deferred with substantially all payments due in 2021, for which the majority is due in January/February of 2021.

Disposition of Properties (Tabl

Disposition of Properties (Tables)	9 Months Ended
	Sep. 30, 2020
Disposition of Properties [Abstract]
Disposition of Property	The following table sets forth certain summarized information regarding properties and land outparcels sold during the nine months ended September 30, 2020 and September 30, 2019: Property Location Date Sold Square Feet Net Sales Proceeds Gain on Sale (in 000’s) 2020 Dispositions: Terrell Terrell, Texas August 2020 178 $ 7,626 $ 2,324 2019 Dispositions: Nags Head, Ocean City, Park City, and Williamsburg Nags Head, NC, Ocean City, MD, Park City, UT, and Williamsburg, IA March 2019 878 $ 128,248 $ 43,422

Investments in Unconsolidated_2

Investments in Unconsolidated Real Estate Joint Ventures (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 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: RioCan Canada Various 50.0 % 765 $ 92.5 $ — $ 92.5 Investments included in other liabilities: Columbus (2) Columbus, OH 50.0 % 355 $ (3.6) $ 85.0 Charlotte (2) Charlotte, NC 50.0 % 399 (13.1) 99.6 National Harbor (2) National Harbor, MD 50.0 % 341 (8.7) 94.5 Galveston/Houston (2) Texas City, TX 50.0 % 353 (19.8) 79.9 $ (45.2) As of December 31, 2019 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: RioCan Canada Various 50.0 % 764 $ 94.7 $ 9.2 $ 94.7 Investments included in other liabilities: Columbus (2) Columbus, OH 50.0 % 355 $ (3.5) $ 85.0 Charlotte (2) Charlotte, NC 50.0 % 399 (13.0) 99.5 National Harbor (2) National Harbor, MD 50.0 % 341 (5.9) 94.4 Galveston/Houston (2) Texas City, TX 50.0 % 353 (19.7) 79.9 $ (42.1) (1) Net of debt origination costs of $1.1 million as of September 30, 2020 and net of debt origination cost and including premiums of $1.1 million as of December 31, 2019.
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 Nine months ended September 30, September 30, 2020 2019 2020 2019 Fee: Management and marketing $ 471 $ 567 $ 1,156 $ 1,696 Leasing and other fees 15 32 50 71 Expense reimbursements from unconsolidated joint ventures 708 757 2,156 2,176 Total Fees $ 1,194 $ 1,356 $ 3,362 $ 3,943
Schedule of impairment charges [Table Text Block]	During June 2020, the Rio-Can joint venture recognized an impairment charge related to its Saint-Sauveur property in Quebec. The impairment charge was primarily driven by deterioration of net operating income caused by market competition and the COVID-19 pandemic. The table below summarizes the impairment charge taken during the second quarter of 2020 (in thousands): Impairment Charge (1) Outlet Center Total Our Share 2020 Saint-Sauveur $ 6,181 $ 3,091 (1) The fair value was determined using an income approach considering the prevailing market income capitalization rates for similar assets.
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 September 30, 2020 December 31, 2019 Assets Land $ 88,312 $ 90,859 Buildings, improvements and fixtures 461,593 477,061 Construction in progress 4,801 4,779 554,706 572,699 Accumulated depreciation (138,622) (132,860) Total rental property, net 416,084 439,839 Cash and cash equivalents 16,515 19,750 Deferred lease costs and other intangibles, net 5,134 6,772 Prepaids and other assets 24,355 17,789 Total assets $ 462,088 $ 484,150 Liabilities and Owners’ Equity Mortgages payable, net $ 358,940 $ 368,032 Accounts payable and other liabilities 15,911 17,173 Total liabilities 374,851 385,205 Owners’ equity 87,237 98,945 Total liabilities and owners’ equity $ 462,088 $ 484,150
Summary Financial Information Of Unconsolidated JVs Statements of Operations	Three months ended Nine months ended Condensed Combined Statements of Operations September 30, September 30, - Unconsolidated Joint Ventures 2020 2019 2020 2019 Revenues $ 16,959 $ 23,050 $ 55,470 $ 70,088 Expenses: Property operating 8,035 8,380 24,023 27,780 General and administrative 82 19 344 171 Asset impairment — — 6,181 — Depreciation and amortization 5,877 6,051 17,686 18,478 Total expenses 13,994 14,450 48,234 46,429 Other income (expense): Interest expense (3,024) (4,059) (9,991) (12,331) Other income 104 179 165 305 Total other income (expense) (2,920) (3,880) $ (9,826) $ (12,026) Net income (loss) $ 45 $ 4,720 $ (2,590) $ 11,633 The Company and Operating Partnership’s share of: Net income (loss) $ (42) $ 2,329 $ (1,490) $ 5,604 Depreciation and amortization (real estate related) $ 3,003 $ 3,058 $ 9,038 $ 9,453

Debt Guaranteed by the Company

Debt Guaranteed by the Company (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 December 31, 2019 Unsecured lines of credit $ — $ — Unsecured term loan $ 350,000 $ 350,000

Debt of the Operating Partner_2

Debt of the Operating Partnership (Tables) - Tanger Properties Limited Partnership [Member]	9 Months Ended
	Sep. 30, 2020
Schedule of Debt	The debt of the Operating Partnership consisted of the following (in thousands): As of As of September 30, 2020 December 31, 2019 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 $ 247,801 $ 250,000 $ 247,308 Senior notes 3.750 % December 2024 250,000 248,401 250,000 248,127 Senior notes 3.125 % September 2026 350,000 346,630 350,000 346,215 Senior notes 3.875 % July 2027 300,000 297,248 300,000 296,953 Mortgages payable: Atlantic City (2)(3) 5.14 % - 7.65% November 2021- December 2026 28,253 29,578 30,909 32,531 Southaven LIBOR + 1.80% April 2021 51,400 51,346 51,400 51,272 Unsecured term loan LIBOR (4) + 1.00% April 2024 350,000 347,213 350,000 347,367 Unsecured lines of credit LIBOR (4) + 1.00% October 2021 (5) — — — — $ 1,579,653 $ 1,568,217 $ 1,582,309 $ 1,569,773 (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) 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. (5) 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 September 30, 2020 for the next five years and thereafter are as follows (in thousands): Calendar Year Amount For the remainder of 2020 $ 910 2021 57,193 2022 4,436 2023 254,768 2024 605,140 Thereafter 657,206 Subtotal 1,579,653 Net discount and debt origination costs (11,436) Total $ 1,568,217

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 December 31, 2019 Assets (Liabilities) (1) : Interest rate swaps: April 13, 2016 January 1, 2021 175,000 1 month LIBOR 1.03 % $ (411) $ 1,018 March 1, 2018 January 31, 2021 40,000 1 month LIBOR 2.47 % (311) (376) August 14, 2018 January 1, 2021 150,000 1 month LIBOR 2.20 % (817) (896) July 1, 2019 February 1, 2024 25,000 1 month LIBOR 1.75 % (1,314) (170) January 1, 2021 February 1, 2024 150,000 1 month LIBOR 0.60 % (2,043) — January 1, 2021 February 1, 2024 $ 100,000 1 month LIBOR 0.22 % $ (238) — Total $ 640,000 $ (5,134) $ (424)
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 September 30, Nine months ended September 30, 2020 2019 2020 2019 Interest Rate Swaps: Amount of loss recognized in other comprehensive income (loss) on derivative $ 1,463 $ (1,011) $ (4,711) $ (6,576)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020: Assets: Short-term government securities ( cash and cash equivalents) $ 20,626 $ 20,626 $ — $ — Total assets $ 20,626 $ 20,626 $ — $ — Liabilities: Interest rate swaps (other liabilities) $ 5,134 $ — $ 5,134 $ — Total liabilities $ 5,134 $ — $ 5,134 $ — 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, 2019: Asset: Interest rate swaps (prepaids and other assets) $ 1,018 $ — $ 1,018 $ — Total assets $ 1,018 $ — $ 1,018 $ — Liabilities: Interest rate swaps (other liabilities) $ 1,442 $ — $ 1,442 $ — Total liabilities $ 1,442 $ — $ 1,442 $ —
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): September 30, 2020 December 31, 2019 Level 1 Quoted Prices in Active Markets for Identical Assets or Liabilities $ — $ — Level 2 Significant Observable Inputs 1,133,864 1,169,481 Level 3 Significant Unobservable Inputs 431,285 434,333 Total fair value of debt $ 1,565,149 $ 1,603,814 Recorded value of debt $ 1,568,217 $ 1,569,773

Shareholders' Equity of the C_2

Shareholders' Equity of the Company (Tables)	9 Months Ended
	Sep. 30, 2020
Class of Stock [Line Items]
Share repurchase program	Shares repurchased were follows: Three months ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Total number of shares purchased — 650,929 — 1,209,328 Average price paid per share $ — $ 15.34 $ — $ 16.52 Total price paid exclusive of commissions and related fees (in thousands) $ — $ 9,987 $ — $ 19,976

Partners' Equity of the Opera_2

Partners' Equity of the Operating Partnership (Tables)	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020 and September 30, 2019: Limited Partnership Units General Partnership Units Class A Class B Total Balance June 30, 2019 1,000,000 4,960,684 92,544,267 97,504,951 Repurchase of units — — (650,929) (650,929) Balance September 30, 2019 1,000,000 4,960,684 91,893,338 96,854,022 Balance December 31, 2018 1,000,000 4,960,684 92,941,783 97,902,467 Grant of restricted common share awards by the Company, net of forfeitures — — 242,167 242,167 Repurchase of units — — (1,209,328) (1,209,328) Units withheld for employee income taxes — — (81,284) (81,284) Balance September 30, 2019 1,000,000 4,960,684 91,893,338 96,854,022 Balance June 30, 2020 1,000,000 4,911,173 92,472,267 97,383,440 Forfeitures of restricted common share awards — — (18,996) (18,996) Balance September 30, 2020 1,000,000 4,911,173 92,453,271 97,364,444 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 — — 611,350 611,350 Issuance of deferred units — — 6,258 6,258 Units withheld for employee income taxes — — (56,597) (56,597) Balance September 30, 2020 1,000,000 4,911,173 92,453,271 97,364,444

Earnings Per Share of the Com_2

Earnings Per Share of the Company (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, Nine months ended September 30, 2020 2019 2020 2019 Numerator: Net income (loss) attributable to Tanger Factory Outlet Centers, Inc. $ 13,029 $ 23,546 $ (36,541) $ 99,604 Less allocation of earnings to participating securities (146) (305) (692) (1,030) Net income (loss) available to common shareholders of Tanger Factory Outlet Centers, Inc. $ 12,883 $ 23,241 $ (37,233) $ 98,574 Denominator: Basic weighted average common shares 92,649 92,514 92,596 92,999 Diluted weighted average common shares 92,649 92,514 92,596 92,999 Basic earnings per common share: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06 Diluted earnings per common share: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06

Earnings Per Unit of the Oper_2

Earnings Per Unit of the Operating Partnership (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, Nine months ended September 30, 2020 2019 2020 2019 Numerator: Net income (loss) attributable to partners of the Operating Partnership $ 13,719 $ 24,809 $ (38,480) $ 104,912 Less allocation of earnings to participating securities (147) (305) (692) (1,030) Net income (loss) available to common unitholders of the Operating Partnership $ 13,572 $ 24,504 $ (39,172) $ 103,882 Denominator: Basic weighted average common units 97,560 97,474 97,507 97,959 Diluted weighted average common units 97,560 97,474 97,507 97,959 Basic earnings per common unit: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06 Diluted earnings per common unit: Net income (loss) $ 0.14 $ 0.25 $ (0.40) $ 1.06

Equity-Based Compensation of _2

Equity-Based Compensation of the Company (Tables) - Tanger Factory Outlet Centers, Inc. [Member]	9 Months Ended
	Sep. 30, 2020
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 Nine months ended September 30, September 30, 2020 2019 2020 2019 Restricted common shares (1) $ 1,610 $ 2,084 $ 5,731 $ 9,224 Notional unit performance awards (1) 624 1,446 3,606 5,021 Options 113 45 229 126 Total equity-based compensation $ 2,347 $ 3,575 $ 9,566 $ 14,371 (1) The nine months ended September 30, 2019 includes the accelerated recognition of compensation cost related to the planned retirement of an executive officer. Equity-based compensation expense capitalized as a part of rental property and deferred lease costs were as follows (in thousands): Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Equity-based compensation expense capitalized $ 103 $ 94 $ 305 $ 286
Schedule of Nonvested Performance-based Units Activity	The following table sets forth 2020 OPP performance targets and other relevant information about the 2020 OPP: Performance targets (1) Absolute portion of award: Percent of total award 33.3% Absolute total shareholder return range 36.8 % - 52.1% 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) 902,167 February grant date fair value per share $ 7.30 April grant date fair value per share (3) $ 3.11 (1) The number of restricted common shares received under the 2020 OPP will be determined on a pro-rata basis by linear interpolation between total shareholder return thresholds, both for absolute total shareholder return and for relative total shareholder return amongst the Company’s peer group. (2) The peer group is based on companies included in the FTSE NAREIT Retail Index.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair values of the 2020 OPP awards granted during the nine months ended September 30, 2020 were determined at the grant dates using a Monte Carlo simulation pricing model and the following assumptions: Risk free interest rate (1) 1.4 % Expected dividend yield (2) 8.4 % Expected volatility (3) 29 % (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)	9 Months Ended
	Sep. 30, 2020
Tanger Factory Outlet Centers, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents changes in the balances of each component of accumulated comprehensive loss for the three and nine months ended September 30, 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 June 30, 2020 $ (29,249) $ (6,264) $ (35,513) $ (1,590) $ (335) $ (1,925) Other comprehensive income (loss) before reclassifications 1,776 (42) 1,734 94 (3) 91 Reclassification out of accumulated other comprehensive income/loss into interest expense — 1,432 1,432 — 76 76 Balance September 30, 2020 $ (27,473) $ (4,874) $ (32,347) $ (1,496) $ (262) $ (1,758) 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 (2,379) (6,995) (9,374) (127) (372) (499) Reclassification out of accumulated other comprehensive income/loss into interest expense — 2,522 2,522 — 134 134 Balance September 30, 2020 $ (27,473) $ (4,874) $ (32,347) $ (1,496) $ (262) $ (1,758) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three and nine months ended September 30, 2019 (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 June 30, 2019 $ (25,591) $ 176 $ (25,415) $ (1,397) $ 8 $ (1,389) Other comprehensive loss before reclassifications (998) (447) (1,445) (53) (25) (78) Reclassification out of accumulated other comprehensive income/loss into other income (expense) for interest expense for cash flow hedges — (512) (512) — (27) (27) Balance September 30, 2019 $ (26,589) $ (783) $ (27,372) $ (1,450) $ (44) $ (1,494) 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, 2018 $ (32,610) $ 5,459 $ (27,151) $ (1,770) $ 290 $ (1,480) Other comprehensive income (loss) before reclassifications 2,567 (4,296) (1,729) 136 (230) (94) Reclassification out of accumulated other comprehensive income/loss for foreign currency and interest expense for cash flow hedges 3,454 (1,946) 1,508 184 (104) 80 Balance September 30, 2019 $ (26,589) $ (783) $ (27,372) $ (1,450) $ (44) $ (1,494)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) of the Operating Partnership (Tables)	9 Months Ended
	Sep. 30, 2020
Tanger Properties Limited Partnership [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents changes in the balances of each component of accumulated comprehensive loss for the three and nine months ended September 30, 2020 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance June 30, 2020 $ (30,839) $ (6,599) $ (37,438) Other comprehensive income (loss) before reclassifications 1,870 (45) 1,825 Reclassification out of accumulated other comprehensive income (loss) into interest expense for cash flow hedges — 1,508 1,508 Balance September 30, 2020 $ (28,969) $ (5,136) $ (34,105) Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2019 $ (26,463) $ (425) $ (26,888) Other comprehensive loss before reclassifications (2,506) (7,367) (9,873) Reclassification out of accumulated other comprehensive income (loss) into interest expense — 2,656 2,656 Balance September 30, 2020 $ (28,969) $ (5,136) $ (34,105) The following table presents changes in the balances of each component of accumulated comprehensive income (loss) for the three and nine months ended September 30, 2019 (in thousands): Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance June 30, 2019 $ (26,988) $ 184 $ (26,804) Other comprehensive loss before reclassifications (1,051) (472) (1,523) Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for interest expense for cash flow hedges — (539) (539) Balance September 30, 2019 $ (28,039) $ (827) $ (28,866) Foreign Currency Cash flow hedges Accumulated Other Comprehensive Income (Loss) Balance December 31, 2018 $ (34,380) $ 5,749 $ (28,631) Other comprehensive income (loss) before reclassifications 2,703 (4,526) (1,823) Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges 3,638 (2,050) 1,588 Balance September 30, 2019 $ (28,039) $ (827) $ (28,866)

Leasing Agreements (Tables)

Leasing Agreements (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Components of rental revenues	The components of rental revenues are as follows (in thousands): Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Rental revenues - fixed $ 78,312 $ 89,055 $ 213,760 $ 272,482 Rental revenues - variable (1) 21,939 25,995 57,322 74,907 Rental revenues $ 100,251 $ 115,050 $ 271,082 $ 347,389 (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)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 September 30, 2019 Costs relating to construction included in accounts payable and accrued expenses $ 21,416 $ 18,417 Interest paid, net of interest capitalized was as follows (in thousands): Nine months ended September 30, 2020 2019 Interest paid $ 44,990 $ 44,231

Business (Details)

Business (Details) ft² in Millions	Sep. 30, 2020ft²sharesOutletCentersubsidiary
Entity Information [Line Items]
Number of Operating Partnership Units Owned by the Company | shares	93,453,271
Exchange ratio of Partnership Units for common shares	1
Consolidated Properties [Member]
Entity Information [Line Items]
Number of outlet centers	31
Total gross leaseable area of outlet centers (in square feet) | ft²	11.9
Unconsolidated Properties [Member]
Entity Information [Line Items]
Number of outlet centers	7
Total gross leaseable area of outlet centers (in square feet) | ft²	2.2
Unconsolidated Properties [Member] | CANADA
Entity Information [Line Items]
Number of outlet centers	3
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	4,911,173

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Net accounts receivable		$ 32.3	$ 4.8
Straight line rent adjustments receivable		$ 57.6	$ 61.6
Foxwoods [Member]
Impairment charge	$ 45.7

COVID-19 Pandemic (Narrative) (

COVID-19 Pandemic (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Aug. 31, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Feb. 29, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Deferral option percentage	100.00%
Rents deemed uncollectible		5.00%				15.00%
Uncollectible accounts reserve increase (decrease)		$ 2,200,000				$ 11,800,000
Straight-line rent write off		$ 2,400,000				6,100,000
Percentage of rent from bankruptcy		2.00%		9.00%
Repayments of Long-term Lines of Credit			$ 599,800,000
Reduced cash outflows due to decrease in property operating and general and administrative expenses					$ 15,400,000
Reduced cash outflows due to decrease in general and administrative expenses					1,900,000
Reduced cash outflows due to decrease in property operating expenses					13,500,000
Dividend distributions suspended savings in cash per quarter		$ 35,000,000			35,000,000	$ 35,000,000
Recent Chapter 11 bankruptcy filings [Member]
Concentration Risk [Line Items]
Percentage of rent from bankruptcy						89.00%
Tanger Properties Limited Partnership [Member]
Concentration Risk [Line Items]
Repayments of Long-term Lines of Credit						$ 641,630,000	$ 416,400,000
Principal		1,579,653,000			1,579,653,000	1,579,653,000			$ 1,582,309,000
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Concentration Risk [Line Items]
Principal		0			0	0			$ 0
Debt [Member] | Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Concentration Risk [Line Items]
Line of credit borrowing capacity	$ 600,000,000	$ 600,000,000			$ 600,000,000	$ 600,000,000		$ 600,000,000

COVID-19 Pandemic (Details)

COVID-19 Pandemic (Details) - USD ($)	1 Months Ended	3 Months Ended
	Oct. 31, 2020	Sep. 30, 2020	Jun. 30, 2020
Concentration Risk [Line Items]
Rents collected		$ 82,006,000	$ 40,995,000
Percent of Rents collected		86.00%	42.00%
Rents expected to be collected		$ 5,379,000	$ 5,012,000
Percent of rents expected to be collected		6.00%	5.00%
Rents deferred		$ 618,000	$ 25,327,000
Percent of rents deferred		1.00%	26.00%
Under negotiation		$ 1,589,000	$ 2,739,000
Percentage of rent under negotiation		2.00%	3.00%
One-time rent concessions in exchange for amendments to lease structure		$ 1,544,000	$ 13,176,000
Percentage of one-time rent concessions in exchange for landloard-favorable amendments to lease structure		2.00%	13.00%
Bankruptcy related, primarily pre-petition rents		$ 2,258,000	$ 8,719,000
Percentage of bankruptcy related, primarily pre-petition rents		2.00%	9.00%
At risk due to tenant financial weakness		$ 1,407,000	$ 1,540,000
Percentage of rent at risk due to tenant financial weakness		1.00%	2.00%
Total rents billed		$ 94,801,000	$ 97,508,000
Percentage of rents billed		100.00%	100.00%
Subsequent Event [Member] | Second Quarter [Member]
Concentration Risk [Line Items]
Rents collected	$ 968,000
Subsequent Event [Member] | Third Quarter [Member]
Concentration Risk [Line Items]
Rents collected	$ 2,300,000

Disposition of Properties (Deta

Disposition of Properties (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] ft² in Thousands, $ in Thousands	1 Months Ended		3 Months Ended	9 Months Ended
	Aug. 31, 2020USD ($)ft²	Mar. 31, 2019USD ($)ft²	Sep. 30, 2020USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)property
Terrell
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross proceeds from sale of assets			$ 8,000	$ 8,000
Area of Real Estate Property | ft²	178
Net Sales Proceeds	$ 7,626
Gain on sale of assets	$ 2,324
Nags Head, Ocean City, Park City, and Williamsburg
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property					4
Gross proceeds from sale of assets					$ 130,500
Area of Real Estate Property | ft²		878
Net Sales Proceeds		$ 128,248
Gain on sale of assets		$ 43,422

Investments in Unconsolidated_3

Investments in Unconsolidated Real Estate Joint Ventures (Unconsolidated Real Estate Joint Ventures) (Details) ft² in Thousands, $ in Thousands	Sep. 30, 2020USD ($)ft²	Dec. 31, 2019USD ($)ft²
RioCan Canda [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	765	764
Carrying Value of Investment	$ 92,500	$ 94,700
Columbus, Charlotte, National Harbor and Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Reported In Liabilities	$ (45,200)	$ (42,100)
Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%	50.00%
Square Feet | ft²	355	355
Equity Method Investment Reported In Liabilities	$ (3,600)	$ (3,500)
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	$ (13,100)	$ (13,000)
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	$ (8,700)	$ (5,900)
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	$ (19,800)	$ (19,700)
Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	358,940	368,032
Unconsolidated Properties [Member] | RioCan Canda [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	0	9,200
Unconsolidated Properties [Member] | Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	85,000	85,000
Unconsolidated Properties [Member] | Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	99,600	99,500
Unconsolidated Properties [Member] | National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	94,500	94,400
Unconsolidated Properties [Member] | Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Total joint venture debt, net	79,900	79,900
Mortgages [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Net of debt origination costs and including premiums	$ 1,100	$ 1,100

Investments in Unconsolidated_4

Investments in Unconsolidated Real Estate Joint Ventures (Joint Venture Fees) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Management, Leasing and other services [Line Items]
Fees received	$ 1,194	$ 1,356	$ 3,362	$ 3,943
Management and Marketing Fee [Member]
Management, Leasing and other services [Line Items]
Fees received	471	567	1,156	1,696
Leasing and other fees [Member]
Management, Leasing and other services [Line Items]
Fees received	15	32	50	71
Expense reimbursements from unconsolidated joint ventures [Member]
Management, Leasing and other services [Line Items]
Fees received	$ 708	$ 757	$ 2,156	$ 2,176

Investments in Unconsolidated_5

Investments in Unconsolidated Real Estate Joint Ventures (Impairment) (Details) - Unconsolidated Properties [Member] - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Impairment charge		$ 0	$ 6,181	$ 0
Les Factoreries St. Sauveur Property [Member]
Schedule of Equity Method Investments [Line Items]
Impairment charge	$ 6,181
Impairment Losses Related to Real Estate Partnerships	$ 3,091

Investments in Unconsolidated_6

Investments in Unconsolidated Real Estate Joint Ventures (Summary Balance Sheets for Unconsolidated Joint Ventures) (Details) - Unconsolidated Properties [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Land	$ 88,312	$ 90,859
Buildings, improvements and fixtures	461,593	477,061
Construction in progress	4,801	4,779
Rental property, at cost, total	554,706	572,699
Accumulated depreciation	(138,622)	(132,860)
Total rental property, net	416,084	439,839
Cash and cash equivalents	16,515	19,750
Deferred lease costs and other intangibles, net	5,134	6,772
Prepaids and other assets	24,355	17,789
Total assets	462,088	484,150
Liabilities and Owners’ Equity
Mortgages payable, net	358,940	368,032
Accounts payable and other liabilities	15,911	17,173
Total liabilities	374,851	385,205
Owners’ equity	87,237	98,945
Total liabilities and equity	$ 462,088	$ 484,150

Investments in Unconsolidated_7

Investments in Unconsolidated Real Estate Joint Ventures (Summary Statements of Operations for Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Unconsolidated Properties [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	$ 16,959	$ 23,050	$ 55,470	$ 70,088
Expenses:
Property operating	8,035	8,380	24,023	27,780
General and administrative	82	19	344	171
Impairment charge	0		6,181	0
Depreciation and amortization	5,877	6,051	17,686	18,478
Total expenses	13,994	14,450	48,234	46,429
Interest expense	(3,024)	(4,059)	(9,991)	(12,331)
Other income (expense)	104	179	165	305
Total other income (expense)	(2,920)	(3,880)	(9,826)	(12,026)
Net income (loss)	45	4,720	(2,590)	11,633
Tanger Factory Outlet Centers, Inc. [Member]
Summary Statements of Operations of Unconsolidated Joint Ventures [Line Items]
Revenues	103,213	118,994	278,836	357,856
Expenses:
Property operating	35,206	39,149	101,991	118,252
General and administrative	11,181	12,292	35,331	40,910
Impairment charge	0	0	45,675	0
Depreciation and amortization	29,903	30,103	87,966	93,009
Total expenses	76,290	81,544	270,963	252,171
Interest expense	(15,647)	(15,197)	(47,786)	(46,638)
Other income (expense)	161	227	789	(2,966)
Total other income (expense)	(13,162)	(14,970)	(44,673)	(6,182)
Net income (loss)	13,719	24,809	(38,290)	105,107
The Company and Operating Partnership's share of:
Net income (loss)	(42)	2,329	(1,490)	5,604
Depreciation and amortization (real estate related)	$ 3,003	$ 3,058	$ 9,038	$ 9,453

Investments in Unconsolidated_8

Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) $ in Millions	1 Months Ended
	Jun. 30, 2020Extension	May 31, 2020USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Schedule of Equity Method Investments [Line Items]
Differences in basis			$ 3.6	$ 3.8
Galveston/Houston [Member] | Mortgages [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Term of mortgage extension	6 months	1 year
Number of mortgage extensions | Extension	2
RioCan Canda [Member] | Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Repayments of Debt		$ 8.3

Debt Guaranteed by the Compan_2

Debt Guaranteed by the Company (Details) - Debt [Member] - USD ($)	Sep. 30, 2020	Mar. 31, 2020	Feb. 29, 2020	Dec. 31, 2019
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit borrowing capacity	$ 600,000,000	$ 600,000,000	$ 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	$ 350,000,000			$ 350,000,000

Debt of the Operating Partner_3

Debt of the Operating Partnership (Schedule of Debt) (Details) - USD ($)	1 Months Ended		9 Months Ended
	Feb. 29, 2020	Jan. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2011
Debt Instrument [Line Items]
LIBOR floor interest rate				0.25%
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Principal			$ 1,579,653,000		$ 1,582,309,000
Book value of debt			$ 1,568,217,000		1,569,773,000
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			$ 247,801,000		247,308,000
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			$ 248,401,000		248,127,000
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			$ 346,630,000		346,215,000
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			297,248,000		296,953,000
Tanger Properties Limited Partnership [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]
Debt Instrument [Line Items]
Principal			28,253,000		30,909,000
Book value of debt			29,578,000		32,531,000
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			51,346,000		51,272,000
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Principal	$ 350,000,000		350,000,000		350,000,000
Book value of debt			347,213,000		347,367,000
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%	0.90%	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%	0.875%	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	Sep. 30, 2020	Dec. 31, 2019
Schedule of Maturities of Debt [Line Items]
For the remainder of 2020	$ 910
2021	57,193
2022	4,436
2023	254,768
2024	605,140
Thereafter	657,206
Subtotal	1,579,653	$ 1,582,309
Net discount and debt origination costs	(11,436)
Total debt	$ 1,568,217	$ 1,569,773

Debt of the Operating Partner_5

Debt of the Operating Partnership (Narrative) (Details)	1 Months Ended				3 Months Ended	9 Months Ended
	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Feb. 29, 2020USD ($)	Jan. 31, 2020	Aug. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	May 31, 2020	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Maximum thresholds for total leverage and unsecured leverage	0.65							0.60
Netting of cash balances in excess	$ 30,000,000
Property Management Fee, Percent Fee	3.00%
LIBOR floor interest rate	0.25%
Repayments of Long-term Lines of Credit					$ 599,800,000
Minimum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty						5.00%
Maximum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty						100.00%
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Proceeds from revolving credit facility						$ 641,630,000	$ 275,400,000
Repayments of Long-term Lines of Credit						641,630,000	416,400,000
Principal						1,579,653,000			$ 1,582,309,000
Tanger Properties Limited Partnership [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Net book value of collateral for mortgages payable						165,500,000
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Liquidity Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings						20,000,000
Line of Credit Facility, Syndicated Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings						580,000,000
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized						$ 1,200,000,000
Percentage of funds from operations allowed on a cumulative basis to pay dividends						95.00%
Proceeds from revolving credit facility		$ 599,800,000
Principal						$ 0			0
Line of Credit Facility, Commitment Fee Percentage			0.20%	0.15%
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Principal			$ 350,000,000			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			600,000,000
Tanger Factory Outlet Centers, Inc. [Member]
Debt Instrument [Line Items]
Proceeds from revolving credit facility						641,630,000	275,400,000
Repayments of Long-term Lines of Credit						641,630,000	$ 416,400,000
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						16,400,000
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
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						$ 350,000,000			$ 350,000,000
London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%	0.875%		1.00%
London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%	0.90%		1.00%

Derivative Financial Instrume_3

Derivative Financial Instruments (Classifications on Consolidated Balance Sheets) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional Amount	$ 640,000
Fair Value	(5,134)	$ (424)
Interest Rate Swap April 13, 2016 [Member]
Derivative [Line Items]
Notional Amount	$ 175,000
Company Fixed Pay Rate	1.03%
Fair Value	$ (411)	1,018
Interest Rate Swap March 1, 2018 [Member]
Derivative [Line Items]
Notional Amount	$ 40,000
Company Fixed Pay Rate	2.47%
Fair Value	$ (311)	(376)
Interest Rate Swap August 14, 2018 [Member]
Derivative [Line Items]
Notional Amount	$ 150,000
Company Fixed Pay Rate	2.20%
Fair Value	$ (817)	(896)
Interest Rate Swap July 1, 2019 [Member]
Derivative [Line Items]
Notional Amount	$ 25,000
Company Fixed Pay Rate	1.75%
Fair Value	$ (1,314)	(170)
Interest Rate Swap January 1, 2021 [1] [Member]
Derivative [Line Items]
Notional Amount	$ 150,000
Company Fixed Pay Rate	0.60%
Fair Value	$ (2,043)	0
Interest Rate Swap January 1, 2021 [2] [Member]
Derivative [Line Items]
Notional Amount	$ 100,000
Company Fixed Pay Rate	0.22%
Fair Value	$ (238)	$ 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

Derivative Financial Instrume_4

Derivative Financial Instruments (Gain (Loss) Recognized and Reclassified) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of loss recognized in other comprehensive income (loss) on derivative	$ 1,463	$ (1,011)	$ (4,711)	$ (6,576)

Fair Value Measurements (Recurr

Fair Value Measurements (Recurring) (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	$ 20,626	$ 1,018
Total liabilities	5,134	1,442
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	20,626	0
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	1,018
Total liabilities	5,134	1,442
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)	20,626
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)	20,626
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
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
Interest Rate Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps (prepaids and other assets)		1,018
Interest rate swaps (other liabilities)	5,134	1,442
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)		1,018
Interest rate swaps (other liabilities)	5,134	1,442
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) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
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	$ 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	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	$ 1,565,149	$ 1,603,814
Recorded value of debt	1,568,217	1,569,773
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	1,133,864	1,169,481
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of debt	$ 431,285	$ 434,333

Shareholders' Equity of the C_3

Shareholders' Equity of the Company (Narrative) (Details) - USD ($)	1 Months Ended			3 Months Ended		9 Months Ended
	Jan. 31, 2020	Feb. 28, 2019	Jan. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019
Class of Stock [Line Items]
Dividends payable								$ 35,200,000
Tanger Factory Outlet Centers, Inc. [Member]
Class of Stock [Line Items]
Common dividends paid per common share (in dollars per share)	$ 0.355		$ 0.35
Common dividends per common share (in dollars per share)	0.3575	$ 0.355			$ 0.355	$ 0.7125	$ 1.060
Additional amount authorized		$ 44,300,000
Authorized repurchase amount		$ 169,300,000
Remaining amount authorized to be repurchase				$ 80,000,000		$ 80,000,000
Total number of shares purchased				0	650,929	0	1,209,328
Average price paid per share				$ 0	$ 15.34	$ 0	$ 16.52
Total price paid exclusive of commissions and related fees (in thousands)				$ 0	$ 9,987,000	$ 0	$ 19,976,000
Tanger Properties Limited Partnership [Member]
Class of Stock [Line Items]
Common distributions (in dollars per share)	0.355		$ 0.35		$ 0.355	$ 0.7125	$ 1.060
Cash dividend declared (in dollars per unit)	$ 0.3575	$ 0.355

Partners' Equity of the Opera_3

Partners' Equity of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
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)			611,350	242,167
Forfeitures of restricted common share awards (in units)	(18,996)
Issuance of deferred shares (in shares/units)			6,258
Units withheld for employee income taxes (in units)			(56,597)	(81,284)
General partner (in units)	1,000,000		1,000,000
General partner [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
General partner (in units)	1,000,000	1,000,000	1,000,000	1,000,000
Grant of restricted common shares awards, net of forfeitures (in units)			0	0
Forfeitures of restricted common share awards (in units)	0
Repurchase of units (in units)		0		0
Issuance of deferred shares (in shares/units)			0
Units withheld for employee income taxes (in units)			0	0
General partner (in units)	1,000,000	1,000,000	1,000,000	1,000,000
Class A Limited Partnership Units [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	4,911,173	4,960,684	4,911,173	4,960,684
Grant of restricted common shares awards, net of forfeitures (in units)			0	0
Forfeitures of restricted common share awards (in units)	0
Repurchase of units (in units)		0		0
Issuance of deferred shares (in shares/units)			0
Units withheld for employee income taxes (in units)			0	0
Limited partners (in units)	4,911,173	4,960,684	4,911,173	4,960,684
Class B Limited Partnership Units [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	92,472,267	92,544,267	91,892,260	92,941,783
Grant of restricted common shares awards, net of forfeitures (in units)			611,350	242,167
Forfeitures of restricted common share awards (in units)	(18,996)
Repurchase of units (in units)		(650,929)		(1,209,328)
Issuance of deferred shares (in shares/units)			6,258
Units withheld for employee income taxes (in units)			(56,597)	(81,284)
Limited partners (in units)	92,453,271	91,893,338	92,453,271	91,893,338
Limited partners [Member]
General and Limited Partners' Capital Account, Units [Roll Forward]
Limited partners (in units)	97,383,440	97,504,951	96,803,433	97,902,467
Grant of restricted common shares awards, net of forfeitures (in units)			611,350	242,167
Forfeitures of restricted common share awards (in units)	(18,996)
Repurchase of units (in units)		(650,929)		(1,209,328)
Issuance of deferred shares (in shares/units)			6,258
Units withheld for employee income taxes (in units)			(56,597)	(81,284)
Limited partners (in units)	97,364,444	96,854,022	97,364,444	96,854,022

Earnings Per Share of the Com_3

Earnings Per Share of the Company (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income (loss) attributable to Tanger Factory Outlet Centers, Inc.	$ 13,029	$ 23,546	$ (36,541)	$ 99,604
Less allocation of earnings to participating securities	(146)	(305)	(692)	(1,030)
Net income (loss) available to common shareholders/unitholders	$ 12,883	$ 23,241	$ (37,233)	$ 98,574
Denominator:
Basic weighted average common shares (in shares)	92,649	92,514	92,596	92,999
Diluted weighted average common shares (in shares)	92,649	92,514	92,596	92,999
Basic earnings per common share/unit:
Net income (loss), basic (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Diluted earnings per common share:
Net income (loss), diluted (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Antidilutive Incremental Common Shares Attributable to Notional Units	1,700	1,100	1,700	1,100
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,800	524	1,800	524

Earnings Per Unit of the Oper_3

Earnings Per Unit of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income (loss) attributable to partners of the Operating Partnership	$ 13,719	$ 24,809	$ (38,480)	$ 104,912
Less allocation of earnings to participating securities	(147)	(305)	(692)	(1,030)
Net income (loss) available to common shareholders/unitholders	$ 13,572	$ 24,504	$ (39,172)	$ 103,882
Denominator:
Basic weighted average common shares (in shares)	97,560	97,474	97,507	97,959
Diluted weighted average common shares (in shares)	97,560	97,474	97,507	97,959
Basic earnings per common share/unit:
Net income (loss), basic (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Diluted earnings per common unit:
Net income (loss), diluted (in dollars per share)	$ 0.14	$ 0.25	$ (0.40)	$ 1.06
Antidilutive Incremental Common Shares Attributable to Notional Units	1,700	1,100	1,700	1,100
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,800	524	1,800	524

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 2,347	$ 3,575	$ 9,566	$ 14,371
Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	1,610	2,084	5,731	9,224
Notional unit performance awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	624	1,446	3,606	5,021
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 113	$ 45	$ 229	$ 126

Equity-Based Compensation of _4

Equity-Based Compensation of the Company (Equity-Based Compensation Expense Capitalized) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Tanger Factory Outlet Centers, Inc. [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense capitalized	$ 103	$ 94	$ 305	$ 286

Equity-Based Compensation of _5

Equity-Based Compensation of the Company (Outperformance Plan) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - $ / shares	1 Months Ended
	Apr. 30, 2020	Feb. 29, 2020	Sep. 30, 2020
Shares/Units, granted (in shares/units)		697,000
2020 OPP [Member]
Maximum number of restricted common shares that may be earned			902,167
Granted (in dollars per share)	$ 3.11	$ 7.30
Absolute portion of award [Member] | 2020 OPP [Member]
Percent of total award			33.30%
Relative portion of award [Member] | 2020 OPP [Member]
Percent of total award			66.70%
Minimum [Member] | Absolute portion of award [Member] | 2020 OPP [Member]
Absolute total shareholder return			36.80%
Percentage of units to be earned			20.00%
Minimum [Member] | Relative portion of award [Member] | 2020 OPP [Member]
Percentage of units to be earned			20.00%
Percentile rank of peer group range			30.00%
Maximum [Member] | Absolute portion of award [Member] | 2020 OPP [Member]
Absolute total shareholder return			52.10%
Percentage of units to be earned			100.00%
Maximum [Member] | Relative portion of award [Member] | 2020 OPP [Member]
Percentage of units to be earned			100.00%
Percentile rank of peer group range			80.00%
President and COO [Member] | 2020 OPP [Member]
Shares/Units, granted (in shares/units)	205,480

Equity-Based Compensation of _6

Equity-Based Compensation of the Company (Outperformance Plan Assumptions) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - 2020 OPP [Member]	9 Months Ended
	Sep. 30, 2020
Risk Free Interest Rate	1.40%
Expected Dividend Rate	8.40%
Expected Volatility Rate	29.00%

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			9 Months Ended
	Sep. 30, 2020	Apr. 30, 2020	Feb. 29, 2020	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares paid for tax withholding for share based compensation (in shares)				56,597	81,284
Payment, Tax Withholding, Share-based Payment Arrangement				$ 736	$ 1,781
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	334,500
Exercise price	$ 5.73
Options expire (in years)	10 years
Vesting percentage	20.00%
Vesting period	5 years
Vesting commencement period	1 year
Weighted average grant date fair value	$ 1.03			$ 1.03
Expected Dividend Rate	4.93%
Expected life	6 years 6 months
Expected Volatility Rate	34.39%
Risk Free Interest Rate	0.48%
Forfeiture Rate Used	7.20%
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units, granted (in shares/units)			697,000
President and COO [Member] | Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted		1,000,000
Exercise price		$ 7.15
Options expire (in years)		10 years
Vesting percentage		25.00%
Weighted average grant date fair value		$ 0.42
Expected Dividend Rate		9.86%
Expected life		7 years 10 months 24 days
Expected Volatility Rate		30.00%
Risk Free Interest Rate		0.60%
Forfeiture Rate Used		0.00%
Restricted Common Share Award Plan [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units, granted (in shares/units)			399,000
Lower limit, grant date fair value (in dollars per share)			$ 12.03
Upper limit, grant date fair value (in dollars per share)			$ 13.75
Restricted Common Share Award Plan [Member] | President and COO [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.00%
Vesting period		3 years
Shares/Units, granted (in shares/units)		389,308
Grant Date Fair Value		$ 7.15
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
Restricted Common Share Award Plan [Member] | Chief Executive Officer [Member] | Restricted common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement award holding period				3 years
2020 OPP [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Dividend Rate				8.40%
Expected Volatility Rate				29.00%
Risk Free Interest Rate				1.40%
Share-based Award Measurement Period				3 years
2020 OPP [Member] | Vesting immediately [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			50.00%
2020 OPP [Member] | Vesting one year thereafter [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			50.00%
2020 OPP [Member] | President and COO [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units, granted (in shares/units)		205,480

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 329,983	$ 516,808	$ 456,109	$ 505,535
Ending Balance	349,485	498,200	349,485	498,200
Interest rate swap gain (loss) to be reclassified within twelve months			2,300
Foreign Currency, Tanger Factory Outlet Centers, Inc., AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(29,249)	(25,591)	(25,094)	(32,610)
Other comprehensive income (loss) before reclassifications	1,776	(998)	(2,379)	2,567
Reclassification out of accumulated other comprehensive income/loss into interest expense	0	0	0	3,454
Ending Balance	(27,473)	(26,589)	(27,473)	(26,589)
Cash flow hedges, Tanger Factory Outlet Centers, Inc., AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(6,264)	176	(401)	5,459
Other comprehensive income (loss) before reclassifications	(42)	(447)	(6,995)	(4,296)
Reclassification out of accumulated other comprehensive income/loss into interest expense	1,432	(512)	2,522	(1,946)
Ending Balance	(4,874)	(783)	(4,874)	(783)
Total, Tanger Factory Outlet Centers, Inc., AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(35,513)	(25,415)	(25,495)	(27,151)
Other comprehensive income (loss) before reclassifications	1,734	(1,445)	(9,374)	(1,729)
Reclassification out of accumulated other comprehensive income/loss into interest expense	1,432	(512)	2,522	1,508
Ending Balance	(32,347)	(27,372)	(32,347)	(27,372)
Foreign Currency, noncontrolling interest, AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,590)	(1,397)	(1,369)	(1,770)
Other comprehensive income (loss) before reclassifications	94	(53)	(127)	136
Reclassification out of accumulated other comprehensive income/loss into interest expense	0	0	0	184
Ending Balance	(1,496)	(1,450)	(1,496)	(1,450)
Cash flow hedges, noncontrolling interest, AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(335)	8	(24)	290
Other comprehensive income (loss) before reclassifications	(3)	(25)	(372)	(230)
Reclassification out of accumulated other comprehensive income/loss into interest expense	76	(27)	134	(104)
Ending Balance	(262)	(44)	(262)	(44)
Total, noncontrolling interest, AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,925)	(1,389)	(1,393)	(1,480)
Other comprehensive income (loss) before reclassifications	91	(78)	(499)	(94)
Reclassification out of accumulated other comprehensive income/loss into interest expense	76	(27)	134	80
Ending Balance	$ (1,758)	$ (1,494)	$ (1,758)	$ (1,494)

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance			$ 456,109
Ending Balance	$ 349,485		349,485
Interest rate swap gain (loss) to be reclassified within twelve months			2,300
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(30,839)	$ (26,988)	(26,463)	$ (34,380)
Other comprehensive income (loss) before reclassifications	1,870	(1,051)	(2,506)	2,703
Reclassification out of accumulated other comprehensive income/loss into interest expense				3,638
Ending Balance	(28,969)	(28,039)	(28,969)	(28,039)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(6,599)	184	(425)	5,749
Other comprehensive income (loss) before reclassifications	(45)	(472)	(7,367)	(4,526)
Reclassification out of accumulated other comprehensive income/loss into interest expense	1,508	(539)	2,656	(2,050)
Ending Balance	(5,136)	(827)	(5,136)	(827)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(37,438)	(26,804)	(26,888)	(28,631)
Other comprehensive income (loss) before reclassifications	1,825	(1,523)	(9,873)	(1,823)
Reclassification out of accumulated other comprehensive income/loss into interest expense	1,508	(539)	2,656	1,588
Ending Balance	$ (34,105)	$ (28,866)	$ (34,105)	$ (28,866)

Leasing Agreements - Rental Rev

Leasing Agreements - Rental Revenues (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)storeOutletCenter	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)storeOutletCenter	Sep. 30, 2019USD ($)
Rental revenues - fixed	$ 78,312	$ 89,055	$ 213,760	$ 272,482
Rental revenues - variable	21,939	25,995	57,322	74,907
Rental revenues	$ 100,251	$ 115,050	$ 271,082	$ 347,389
Consolidated Properties [Member]
Number of stores | store	2,200		2,200
Number of outlet centers | OutletCenter	31		31

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Supplemental Cash Flow Information [Abstract]
Costs relating to construction included in accounts payable and accrued expenses	$ 21,416	$ 18,417
Interest paid	$ 44,990	$ 44,231