Investment in Unconsolidated Joint Venture - Condensed Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Oct. 30, 2013	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]
Real estate assets, at cost	$ 1,543,269	$ 1,542,805
Less accumulated depreciation and amortization	(81,326)	(41,183)
Total real estate investments, net	1,461,943	1,501,622
Total assets	1,828,368	2,048,305
Total liabilities	615,353	599,046
Deficit	(200,524)	(86,008)
Total liabilities and equity	1,828,368	2,048,305
Worldwide Plaza
Schedule of Equity Method Investments [Line Items]
Real estate assets, at cost	697,643	696,342
Less accumulated depreciation and amortization	(87,351)	(77,919)
Total real estate investments, net	610,292	618,423
Other assets	253,620	248,048
Total assets	863,912	866,471
Debt	875,000	875,000	875,000	427,900
Other liabilities	13,129	9,923
Total liabilities	888,129	884,923
Deficit	(24,217)	(18,452)
Total liabilities and equity	863,912	866,471
Company's basis	$ 228,834	$ 234,774