Real Estate Intangibles (Real Estate Intangible Maturity Schedule) (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Estimated Aggregate Amortization Expense For Acquired Lease Intangibles Expected To Be Recognized [Line Items]
Totals	$ 400,544,000	$ 359,435,000
Intangible Liability [Member]
Estimated Aggregate Amortization Expense For Acquired Lease Intangibles Expected To Be Recognized [Line Items]
2015	3,364,000
2016	6,512,000
2017	6,052,000
2018	5,583,000
2019	5,325,000
Thereafter	27,993,000
Totals	54,829,000
Intangible Asset [Member]
Estimated Aggregate Amortization Expense For Acquired Lease Intangibles Expected To Be Recognized [Line Items]
2015	58,072,000
2016	72,338,000
2017	43,880,000
2018	29,943,000
2019	23,946,000
Thereafter	172,365,000
Totals	$ 400,544,000