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, 2014		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
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
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
Beginning balance (shares) at Dec. 31, 2015	23,116	23,116
Beginning balance at Dec. 31, 2015	$ 434,004	$ 23	494,207	(151,366)	4,961	$ (1,413)	87,592
Beginning balance, treasury stock (shares) at Dec. 31, 2015	78					78
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 1,280		1,102				178
Exercise of restricted stock units (shares)		9
Exercise of restricted stock units	0
Withholding taxes paid on vested restricted stock units at UCP, Inc.	(45)		(25)				(20)
Changes in ownership of noncontrolling interest	0		(1,846)				1,846
Acquisition of interests held by noncontrolling owners	(159)						(159)
Net loss	(9,565)			(10,199)			634
Unrealized appreciation on investments, net of deferred income tax and reclassification adjustments	529				529
Foreign currency translation	$ 27				27
Ending balance (shares) at Jun. 30, 2016	23,125	23,125
Ending balance at Jun. 30, 2016	$ 426,071	$ 23	$ 493,438	$ (161,565)	$ 5,517	$ (1,413)	$ 90,071
Ending balance, treasury stock (shares) at Jun. 30, 2016	78					78