Tanger Inc. Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation of the Company (Outperformance Plan) (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - 2018 OPP [Member]	6 Months Ended
	Jun. 30, 2018 $ / shares shares
Maximum number of restricted common shares that may be earned \| shares	409,972
Granted (in dollars per share) \| $ / shares	$ 12.42
Absolute portion of award [Member]
Percent of total award	33.30%
Relative portion of award [Member]
Percent of total award	66.70%
Minimum [Member] \| Absolute portion of award [Member]
Absolute total shareholder return	19.10%
Percentage of units to be earned	20.00%
Minimum [Member] \| Relative portion of award [Member]
Percentage of units to be earned	20.00%
Threshold Percentage for Performance Target	30.00%
Maximum [Member] \| Absolute portion of award [Member]
Absolute total shareholder return	29.50%
Percentage of units to be earned	100.00%
Maximum [Member] \| Relative portion of award [Member]
Percentage of units to be earned	100.00%
Threshold Percentage for Performance Target	80.00%