Impairment of Real Estate and Impairment of Unconsolidated Entities (Details 1) - Fair Value, Measurements, Nonrecurring [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Indicative bids [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Fair Value	$ 630,797	$ 38,750
Comparable Property Market Analysis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Fair Value	$ 5,128
Non-recurring Impairment of Real Estate Including Discontiued Operations
Price Per Square Foot	18
Discounted cash flows [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Fair Value		$ 44,200
Minimum [Member] | Discounted cash flows [Member]
Non-recurring Impairment of Real Estate Including Discontiued Operations
Market Capitalization Rate		8.00%
Discount Rate		10.50%
Maximum [Member] | Discounted cash flows [Member]
Non-recurring Impairment of Real Estate Including Discontiued Operations
Market Capitalization Rate		10.00%
Discount Rate		12.00%