Condensed Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Consolidated Statements of Operations and Comprehensive Income [Abstract]
General and administrative expenses	$ (1,340)	$ (3,747)
Operating income (loss)	(1,340)	(3,747)
Interest and investment income	291	289
Interest expense	(3)	(3)
Other income (expense)	(925)	(30)
Income (loss) from continuing operations before income taxes and equity in net income (loss) of affiliates	(1,977)	(3,491)
Income tax (provision) benefit	(10,672)	(2,815)
Income (loss) from continuing operations before equity in net income (loss) of affiliates	(12,649)	(6,306)
Equity in net income (loss) of affiliates	(2,169)	(7,281)
Income (loss) from continuing operations	(14,818)	(13,587)
Income (loss) from discontinued operations, net of tax provision	(7)	123
Net income (loss)	(14,825)	(13,464)
Other comprehensive income (loss), net of tax	763	1,372
Comprehensive income (loss)	$ (14,062)	$ (12,092)
Basic
Income (loss) from continuing operations	$ (0.48)	$ (0.44)
Income (loss) from discontinued operations, net of tax
Net income (loss)	$ (0.48)	$ (0.44)
Diluted
Income (loss) from continuing operations	$ (0.48)	$ (0.44)
Income (loss) from discontinued operations, net of tax
Net income (loss)	$ (0.48)	$ (0.44)
Weighted average common shares outstanding:
Basic	30,920	30,768
Diluted	30,920	30,768