Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended														12 Months Ended
	Aug. 15, 2017	Aug. 16, 2016	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Real Estate Properties [Line Items]
Revenue			$ 5,992		$ 8,775		$ 11,360	$ 11,417	$ 10,595		$ 11,393		$ 11,693		$ 12,450		$ 37,544	$ 46,131		$ 50,250
Net income (loss)			10,774	[1]	20,537	[2]	(1,517)	(751)	(2,223)	[3]	9,324	[3]	(1,226)	[3]	(967)	[3]	29,043	4,908	[3]
Add: Net (income)/loss attributable to noncontrolling interest			72		(4,430)		(22)	(105)	21		59		61		(106)		(4,485)	35		(699)
Net income attributable to the Company's shares			$ 10,846		$ 16,107		$ (1,539)	$ (856)	$ (2,202)		$ 9,383		$ (1,165)		$ (1,073)		$ 24,558	$ 4,943		$ 6,978
Net income/(loss) per common share, basic and diluted			$ 0.29		$ 0.65		$ (0.06)	$ (0.03)	$ (0.09)		$ 0.37		$ (0.05)		$ (0.04)		$ 0.98	$ 0.19		$ 0.27
Gain on sale of real estate and other assets, net																	$ 21,605	$ 11,341		$ 22,771
Impairment charge			$ 4,100														4,132	0		1,417
Income Tax Expense (Benefit)					$ 1,600												(1,604)	(47)		2,726
Income (Loss) from Equity Method Investments																	$ 17,931	$ 0		$ 0
Lakewood Flats
Real Estate Properties [Line Items]
Gain on sale of real estate and other assets, net		$ 11,500									$ 11,500
Courtyard Kauai Coconut Beach Hotel [Member]
Real Estate Properties [Line Items]
Gain on sale of real estate and other assets, net	$ 20,900				20,900
AJS and Holstenplatz [Member]
Real Estate Properties [Line Items]
Income Tax Expense (Benefit)					$ 1,600

[1] Income from continuing operations for the quarter ended December 31, 2017 includes a non-cash impairment charge of $4.1million on our investment in 22 Exchange offset by income from our investment in unconsolidated affiliated joint venture of $17.9 million. See Note 2 and 7 of the Notes to Consolidated Financial Statements for additional information.

[2] Income from continuing operations for the quarter ended September 30, 2017 includes (i) a gain on the sale of real estate of approximately $20.9 million in connection with the sale of the Courtyard Kauai Coconut Beach Hotel and (ii) an aggregate income tax benefit of approximately $1.6 million related to two foreign investments, AJS and Holstenplatz, which were sold in 2015. See Notes 2 and 6 of the Notes to Consolidated Financial Statements for additional information.

[3] Income from continuing operations for the quarter ended September 30, 2016 includes gain on the sale of Lakewood Flats of $11.5 million. See Note 6 of the Notes to Consolidated Financial Statements for additional information.