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Partners' Equity of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
General and Limited Partners' Capital Account, Units [Roll Forward] |  |  |
General partner (in units) | 1,000,000 |  |
Units withheld for employee income taxes (in units) | (89,437) | (69,886) | (66,760)
Grant of restricted common shares awards by the Company, net of forfeitures (in units) | 355,184 | 411,968 | 173,124
Issuance of deferred units (in units) |  |  | 24,040
Repurchase of units (in units) | (919,249) | (1,911,585) |
Units issued upon exercise of options (in units) | 0 | 1,800 | 59,700
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
Units withheld for employee income taxes (in units) | 0 | 0 | 0
Exchange of Class A limited partnership units (in units) | 0 | 0 | 0
Grant of restricted common shares awards by the Company, net of forfeitures (in units) | 0 | 0 | 0
Issuance of deferred units (in units) |  |  | 0
Repurchase of units (in units) | 0 | 0 |
Units issued upon exercise of options (in units) |  | 0 | 0
General partner (in units) | 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) | 4,995,433 | 5,027,781 | 5,052,743
Units withheld for employee income taxes (in units) | 0 | 0 | 0
Exchange of Class A limited partnership units (in units) | (34,749) | (32,348) | (24,962)
Grant of restricted common shares awards by the Company, net of forfeitures (in units) | 0 | 0 | 0
Issuance of deferred units (in units) |  |  | 0
Repurchase of units (in units) | 0 | 0 |
Units issued upon exercise of options (in units) |  | 0 | 0
Limited partners (in units) | 4,960,684 | 4,995,433 | 5,027,781
Class B Limited Partnership Units [Member] |  |  |
General and Limited Partners' Capital Account, Units [Roll Forward] |  |  |
Limited partners (in units) | 93,560,536 | 95,095,891 | 94,880,825
Units withheld for employee income taxes (in units) | (89,437) | (69,886) | (66,760)
Exchange of Class A limited partnership units (in units) | 34,749 | 32,348 | 24,962
Grant of restricted common shares awards by the Company, net of forfeitures (in units) | 355,184 | 411,968 | 173,124
Issuance of deferred units (in units) |  |  | 24,040
Repurchase of units (in units) | (919,249) | (1,911,585) |
Units issued upon exercise of options (in units) |  | 1,800 | 59,700
Limited partners (in units) | 92,941,783 | 93,560,536 | 95,095,891
Limited partners [Member] |  |  |
General and Limited Partners' Capital Account, Units [Roll Forward] |  |  |
Limited partners (in units) | 98,555,969 | 100,123,672 | 99,933,568
Units withheld for employee income taxes (in units) | (89,437) | (69,886) | (66,760)
Exchange of Class A limited partnership units (in units) | 0 | 0 | 0
Grant of restricted common shares awards by the Company, net of forfeitures (in units) | 355,184 | 411,968 | 173,124
Issuance of deferred units (in units) |  |  | 24,040
Repurchase of units (in units) | (919,249) | (1,911,585) |
Units issued upon exercise of options (in units) |  | 1,800 | 59,700
Limited partners (in units) | 97,902,467 | 98,555,969 | 100,123,672

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- Definition The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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