Other Assets and Other Liabilities (Deferred Expenses and Other Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible assets, net	$ 71,446	$ 50,088
Other assets	35,464	37,085
Restricted cash	26,657	19,283
Deferred financing fees, net	26,635	36,774
Other receivables	22,557	13,115
Leasing costs, net	19,393	20,031
Corporate furniture, fixtures and equipment, net	4,405	5,409
Deferred expenses and other assets, net	206,557	181,785
Other finite-lived intangible assets	38,100
Intangible assets, accumulated amortization	37,300	45,100
Amortization of above market lease and lease incentives	6,700	8,600	$ 7,200
Amortization of intangible assets	3,600	6,700	$ 8,200
Accumulated amortization of deferred financing fees	27,800	15,400
Accumulated amortization on leasing costs	9,800	9,000
Accumulated depreciation on corporate furniture, fixtures and equipment	8,100	$ 7,100
Land and Development 3
Other assets	$ 7,000