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	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 gain 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
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
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	$ 2,050		1,730				320
Exercise of restricted stock units (shares)		9
Exercise of restricted stock units	0
Withholding taxes paid on vested restricted stock units at UCP, Inc.	(46)		(26)				(20)
Changes in ownership of noncontrolling interest	1		(1,898)				1,899
Acquisition of interests held by noncontrolling owners	(1,000)						(1,000)
Distribution of treasury stock to deferred compensation plan participants	217		(269)			$ 486
Distribution of treasury stock to deferred compensation plan participant (shares)						(23)
Net loss	(11,424)			(13,100)			1,676
Unrealized gain on investments, net of deferred income tax and reclassification adjustments	1,484				1,484
Foreign currency translation	$ 57				57
Ending balance (shares) at Sep. 30, 2016	23,125	23,125
Ending balance at Sep. 30, 2016	$ 425,343	$ 23	$ 493,744	$ (164,466)	$ 6,502	$ (927)	$ 90,467
Ending balance, treasury stock (shares) at Sep. 30, 2016	55					55