CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Common Stock		Additional Paid-In Capital	Accumulated Deficit	Noncontrolling Interest in Consolidated Entities	Accumulated Other Comprehensive Income	Total
Beginning Balance at Dec. 31, 2014		$ 13	[1]	$ 4,432,482	$ (4,250,428)	$ 4,867		$ 186,934
Beginning Balance, in Shares at Dec. 31, 2014	[1]	13,090,932
Stock-based compensation			[1]	640				640
Issuance of common stock			[1]	17				17
Issuance of common stock, in Shares	[1]	24,977
Cash paid for fractional shares due to reverse split			[1]	(213)				(213)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Distributions to non-controlling interests			[1]			(3,575)		(3,575)
Net income (loss)			[1]		(7,370)	3,007		(4,363)
Ending Balance at Dec. 31, 2015		$ 13	[1]	4,432,926	(4,257,798)	4,299		179,440
Ending Balance, in Shares at Dec. 31, 2015	[1]	13,115,909
Stock-based compensation			[1]	363				363
Issuance of common stock	[1]
Issuance of common stock, in Shares	[1]	28,383
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax			[1]				(87)	(87)
Distributions to non-controlling interests			[1]			(3,696)		(3,696)
Net income (loss)			[1]		(28,888)	3,153		32,041
Ending Balance at Dec. 31, 2016		$ 13	[1]	$ 4,433,289	$ (4,228,910)	$ 3,756	$ (87)	$ 208,061
Ending Balance, in Shares at Dec. 31, 2016	[1]	13,144,292

[1] Common stock and per share data for the three and nine months ended September 30, 2015 have been adjusted retroactively to reflect a net 1-for-10 reverse stock split effective October 7, 2015.