Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2017		22,780
Balance at Dec. 31, 2017		$ 23	$ (5,955)	$ 134,719	$ (32,452)		$ 13,844	$ 110,179
Net income (loss)					(283)		(1,464)	(1,747)
Additional paid-in capital - share-based compensation				365				365
Distributions and distribution equivalents declared on common shares and restricted share units	[1]				(2,038)			(2,038)
Purchases of shares of common shares for treasury			(1,044)					(1,044)
Reissuance of shares of common shares from treasury			83					83
Distributions to non-controlling interest holders							(108)	(108)
Derecognition of non-controlling interest due to deconsolidation
Unrealized loss on available-for-sale securities, net of tax
Capital contributions from non-controlling interest holders							446	446
Balance (in shares) at Mar. 31, 2018		22,780
Balance at Mar. 31, 2018		$ 23	(6,916)	135,084	(34,773)		12,718	106,136
Balance (in shares) at Dec. 31, 2017		22,780
Balance at Dec. 31, 2017		$ 23	(5,955)	134,719	(32,452)		13,844	110,179
Balance (in shares) at Dec. 31, 2018		22,780
Balance at Dec. 31, 2018		$ 23	(7,932)	134,129	(42,513)		13,499	97,206
Net income (loss)					5,069		70	5,139
Additional paid-in capital - share-based compensation				144				144
Distributions and distribution equivalents declared on common shares and restricted share units	[1]				(1,070)			(1,070)
Purchases of shares of common shares for treasury			(753)					(753)
Reissuance of shares of common shares from treasury			357	(39)				318
Distributions to non-controlling interest holders							(913)	(913)
Derecognition of non-controlling interest due to deconsolidation							(12,842)	(12,842)
Unrealized loss on available-for-sale securities, net of tax						(782)		(782)
Balance (in shares) at Mar. 31, 2019		22,780
Balance at Mar. 31, 2019		$ 23	$ (8,328)	$ 134,234	$ (38,514)	$ (782)	$ (186)	$ 86,447

[1] $7.7 million of distributions were dividends paid to shareholders at $0.36 per share. $0.2 million of distributions were dividend equivalents paid on restricted share units.