Real Estate Intangibles (Real Estate Intangible Maturity Schedule) (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Estimated Aggregate Amortization Expense For Acquired Lease Intangibles Expected To Be Recognized [Line Items]
Totals	$ 371,826,000	$ 359,435,000
Intangible Liability [Member]
Estimated Aggregate Amortization Expense For Acquired Lease Intangibles Expected To Be Recognized [Line Items]
2015	3,279,000
2016	6,512,000
2017	6,052,000
2018	5,583,000
2019	5,325,000
Thereafter	26,391,000
Totals	53,142,000
Intangible Asset [Member]
Estimated Aggregate Amortization Expense For Acquired Lease Intangibles Expected To Be Recognized [Line Items]
2015	39,972,000
2016	71,453,000
2017	43,426,000
2018	30,094,000
2019	24,033,000
Thereafter	162,848,000
Totals	$ 371,826,000