Condensed Consolidated Statements of Shareholders' Equity - Unaudited (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	Treasury Stock	Noncontrolling Interest
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
Beginning balance, shares at Dec. 31, 2013		25,821
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1,972		1,385				587
Withholding taxes paid on vested restricted stock units at UCP, Inc.	(813)		(113)				(700)
Net loss	(15,905)			(13,247)			(2,658)
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	487				487
Foreign currency translation	40				40
Ending balance at Mar. 31, 2014	550,626	26	547,579	(30,330)	759	(56,593)	89,185
Ending balance, treasury stock, shares at Mar. 31, 2014						3,073
Ending balance, shares at Mar. 31, 2014		25,821
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
Beginning balance, shares at Dec. 31, 2014	23,083	23,083
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1,115		845				270
Withholding taxes paid on vested restricted stock units at UCP, Inc.	(21)		(12)				(9)
Net loss	(19,809)			(16,825)			(2,984)
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	(51)				(51)
Foreign currency translation	9				9
Ending balance at Mar. 31, 2015	$ 492,788	$ 23	$ 492,495	$ (86,333)	$ 4,675	$ (1,413)	$ 83,341
Ending balance, treasury stock, shares at Mar. 31, 2015	78					78
Ending balance, shares at Mar. 31, 2015	23,083	23,083