Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Expenditures included in construction trade payables	$ 9.8	$ 7.1	$ 13.7
Interest paid, net	48.0	46.8	45.4
Deer Park [Member]
Noncash or part noncash acquisition, debt assumed	237.9
Noncash or part noncash acquisition, noncash financial or equity instrument consideration, shares issued	14.0
Noncash or part noncash acquisition, increase in assets related to step acquisition	27.9
Noncash or part noncash acquisition, increase in assets related to the fair market valuation of previously held interest	26.0
Tanger Properties Limited Partnership [Member]
Noncash or part noncash acquisition, debt assumed			112.7
Noncash financing - fair value of debt assumed adjustments			$ 7.1