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	4,063		2,814				1,249
Sale of treasury stock (shares)						(5)
Sale of treasury stock	$ 111					$ 111
Exercise of restricted stock units (shares)	15
Withholding taxes paid on vested restricted stock units at UCP, Inc.	$ (813)		(354)				(459)
Net loss	(13,996)			(11,409)			(2,587)
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	430				430
Foreign currency translation	(2)				(2)
Ending balance, shares at Jun. 30, 2014		25,836
Ending balance at Jun. 30, 2014	$ 554,638	$ 26	548,767	(28,492)	660	$ (56,482)	90,159
Ending balance, treasury stock, shares at Jun. 30, 2014						3,068
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	$ 2,225		1,694				531
Exercise of restricted stock units (shares)	13
Withholding taxes paid on vested restricted stock units at UCP, Inc.	$ (21)		(12)				(9)
Net loss	(70,622)			(66,595)			(4,027)
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	283				283
Foreign currency translation	$ (37)				(37)
Ending balance, shares at Jun. 30, 2015	23,096	23,096
Ending balance at Jun. 30, 2015	$ 443,373	$ 23	$ 493,344	$ (136,103)	$ 4,963	$ (1,413)	$ 82,559
Ending balance, treasury stock, shares at Jun. 30, 2015	78					78