Basis of Presentation and Consolidation (Details)			12 Months Ended						0 Months Ended
	Dec. 31, 2013 property	Dec. 31, 2012	Dec. 31, 2013 McArthurGlen Group property	Dec. 31, 2013 Weighted average	Dec. 31, 2012 Weighted average	Dec. 31, 2011 Weighted average	Dec. 31, 2013 Wholly owned properties property	Dec. 31, 2013 Partially owned properties property	Dec. 04, 2012 Consolidated properties property
Basis of Presentation
Ownership interests acquired (as a percent)									50.00%
Number of properties included in consolidation							217	18
Total number of joint venture properties	93
Number of joint venture properties managed by the entity	70
Number of International joint venture properties	20
Number of properties in which interest is acquired			5						2
Number of joint venture properties managed by others	23
Ownership interest:
Ownership percentage in the Operating Partnership	85.70%	85.60%		85.60%	83.90%	82.90%