Other Assets and Other Liabilities (Other Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Other Assets and Other Liabilities [Abstract]
Intangible assets, net(1)	$ 60,014,000	[1]		$ 100,652,000	[1]
Other receivables	25,939,000			34,655,000
Deferred financing fees, net(2)	31,048,000	[2]		33,591,000	[2]
Leasing costs, net(3)	22,240,000	[3]		21,799,000	[3]
Corporate furniture, fixtures and equipment, net(4)	6,190,000	[4]		6,557,000	[4]
Other assets	41,189,000			40,726,000
Deferred expenses and other assets, net	186,620,000			237,980,000
Intangible assets, accumulated amortization	34,600,000			38,100,000
Amortization of above market lease	2,300,000		1,600,000
Amortization of intangible assets	2,500,000		2,500,000
Accumulated amortization of deferred financing fees	11,500,000			9,900,000
Accumulated amortization on leasing costs	7,000,000			7,100,000
Accumulated depreciation on corporate furniture, fixtures and equipment	$ 6,400,000			$ 6,200,000

[1] Intangible assets, net are primarily related to the acquisition of real estate assets. Accumulated amortization on intangible assets was $34.6 million and $38.1 million as of March 31, 2014 and December 31, 2013, respectively. The amortization of above market leases decreased operating lease income on the Company's Consolidated Statements of Operations by $2.3 million and $1.6 million for the three months ended March 31, 2014 and 2013, respectively. The amortization expense for other intangible assets was $2.5 million and $2.5 million for the three months ended March 31, 2014 and 2013, respectively. These amounts are included in “Depreciation and amortization” on the Company's Consolidated Statements of Operations.

[2] Accumulated amortization on deferred financing fees was $11.5 million and $9.9 million as of March 31, 2014 and December 31, 2013, respectively.

[3] Accumulated amortization on leasing costs was $7.0 million and $7.1 million as of March 31, 2014 and December 31, 2013, respectively.

[4] Accumulated depreciation on corporate furniture, fixtures and equipment was $6.4 million and $6.2 million as of March 31, 2014 and December 31, 2013, respectively.