Condensed Consolidated Statements of Shareholders' Equity - Unaudited - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	Treasury Stock	Noncontrolling Interest
Beginning balance, shares at Dec. 31, 2013		25,821
Beginning balance at Dec. 31, 2013	$ 564,845	$ 26	$ 546,307	$ (17,083)	$ 232	$ (56,593)	$ 91,956
Beginning balance, treasury stock, shares at Dec. 31, 2013						3,073
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	5,813		4,273				1,540
Sale of treasury stock (shares)						(10)
Sale of treasury stock	$ 223					$ 223
Exercise of restricted stock units (shares)	15
Withholding taxes paid on vested restricted stock units at UCP, Inc.	$ (1,617)		(800)				(817)
Net loss	(24,436)			(21,345)			(3,091)
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	(337)				(337)
Foreign currency translation	245				245
Ending balance, shares at Sep. 30, 2014		25,836
Ending balance at Sep. 30, 2014	$ 544,736	$ 26	549,780	(38,428)	140	$ (56,370)	89,588
Ending balance, treasury stock, shares at Sep. 30, 2014						3,063
Beginning balance, shares at Dec. 31, 2014	23,083	23,083
Beginning balance at Dec. 31, 2014	$ 511,545	$ 23	491,662	(69,508)	4,717	$ (1,413)	86,064
Beginning balance, treasury stock, shares at Dec. 31, 2014	78					78
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 3,053		2,379				674
Exercise of restricted stock units (shares)	12
Withholding taxes paid on vested restricted stock units at UCP, Inc.	$ (370)		(211)				(159)
Distribution to noncontrolling interest	(16)						(16)
Net loss	(83,060)			(80,687)			(2,373)
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	295				295
Foreign currency translation	$ (85)				(85)
Ending balance, shares at Sep. 30, 2015	23,095	23,095
Ending balance at Sep. 30, 2015	$ 431,362	$ 23	$ 493,830	$ (150,195)	$ 4,927	$ (1,413)	$ 84,190
Ending balance, treasury stock, shares at Sep. 30, 2015	78					78