Investment in Unconsolidated Joint Venture - Condensed Income Statement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Equity Method Investments [Line Items]
Rental income	$ 27,171	$ 7,674
Other revenue	6,421	653
Total revenues	33,592	8,327
Property operating	14,005	1,737
Depreciation and amortization	24,254	4,286
Total operating expenses	39,689	8,983
Operating Income (Loss)	(6,097)	(656)
Interest Expense	(3,939)	(2,146)
Net loss	(8,155)	(2,802)
Proceeds from Divestiture of Interest in Joint Venture	(3,936)	0
Net loss attributable to stockholders	(8,156)	(2,794)
Equity in income of unconsolidated joint ventures	1,257	0
Income from unconsolidated joint venture	1,257	0
Worldwide Plaza
Schedule of Equity Method Investments [Line Items]
Rental income	27,655
Other revenue	1,215
Total revenues	28,870
Property operating	11,513
Depreciation and amortization	6,368
Total operating expenses	17,881
Operating Income (Loss)	10,989
Interest Expense	(9,882)
Net loss	1,107
Proceeds from investment	(3,851)
Proceeds from Divestiture of Interest in Joint Venture	(2,560)
Net loss attributable to stockholders	(5,304)
Equity in income of unconsolidated joint ventures	(2,594)
Income from unconsolidated joint venture	$ 1,257