Acquired Properties (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 Properties	Sep. 30, 2013 Properties
Business Acquisition [Line Items]
Number of Businesses Acquired	3	15
Gross Acquisition Price	$ 209,150	$ 831,850
Retail [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired	2	4
Retail [Member] | Suncrest Village [Member]
Business Acquisition [Line Items]
Gross Acquisition Price	14,050
Area of Real Estate Property	93,358
Date	Feb. 13, 2014
Retail [Member] | Plantation Grove [Member]
Business Acquisition [Line Items]
Gross Acquisition Price	12,100
Area of Real Estate Property	73,655
Date	Feb. 13, 2014
Lodging [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired	1	8
Lodging [Member] | Aston Waikiki Beach Hotel [Member]
Business Acquisition [Line Items]
Gross Acquisition Price	$ 183,000
Rooms	645
Date	Feb. 28, 2014
Student Housing [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired		3