Real Estate Investments Long Lived Asset Held-For-Sale (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Long Lived Assets Held-for-sale [Line Items]
Repayments of Long-term Debt		$ 4,885	$ 314
Depreciation Expense on Reclassified Assets	$ 68	135
Property, Plant and Equipment, Gross	1,601,836	1,601,836		$ 1,524,422
Property, Plant and Equipment, Net	50,992	50,992		$ 61,434
Land [Member]
Long Lived Assets Held-for-sale [Line Items]
Property, Plant and Equipment, Gross	2,064	2,064
Building and Improvements [Member]
Long Lived Assets Held-for-sale [Line Items]
Property, Plant and Equipment, Gross	10,563	10,563
Land, Buildings and Improvements [Member]
Long Lived Assets Held-for-sale [Line Items]
Property, Plant and Equipment, Gross	12,627	12,627
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	2,720	2,720
Property, Plant and Equipment, Net	9,907	$ 9,907
Mortgages [Member]
Long Lived Assets Held-for-sale [Line Items]
Repayments of Long-term Debt	$ 2,938