Segment Information - Schedule of Segment Financial Information Relating to Operations (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating revenue
Total operating revenue		$ 325,653	$ 254,695	$ 590,078	$ 451,863
Income before provision for income taxes
Income before provision for income taxes		22,605	20,504	37,591	31,680
Corporate
Income before provision for income taxes
Income before provision for income taxes		(7,939)	(5,248)	(15,743)	(11,698)
California | Reportable Operating Segments
Operating revenue
Total operating revenue	[1]	101,795	87,661	197,679	174,454
Income before provision for income taxes
Income before provision for income taxes		7,965	11,765	17,888	21,077
Arizona | Reportable Operating Segments
Operating revenue
Total operating revenue		35,594	10,508	56,641	17,694
Income before provision for income taxes
Income before provision for income taxes		3,496	306	4,995	610
Nevada | Reportable Operating Segments
Operating revenue
Total operating revenue		48,655	30,771	79,396	58,013
Income before provision for income taxes
Income before provision for income taxes		4,738	2,687	7,296	6,049
Colorado | Reportable Operating Segments
Operating revenue
Total operating revenue		24,176	27,404	50,569	45,593
Income before provision for income taxes
Income before provision for income taxes		872	809	1,301	639
Washington | Reportable Operating Segments
Operating revenue
Total operating revenue		37,364	46,186	70,265	77,466
Income before provision for income taxes
Income before provision for income taxes		2,445	4,319	3,868	6,892
Oregon | Reportable Operating Segments
Operating revenue
Total operating revenue		78,069	52,165	135,528	78,643
Income before provision for income taxes
Income before provision for income taxes		$ 11,028	$ 5,866	$ 17,986	$ 8,111

[1] Operating revenue in the California segment includes construction services revenue.