Segment Information - Schedule of Segment Financial Information Relating to Operations (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating revenue
Total operating revenue		$ 422,692	$ 325,653	$ 681,546	$ 590,078
Income before provision for income taxes:
Income before provision for income taxes		29,456	22,605	14,530	37,591
Income before extinguishment of debt		29,456	22,605	36,358	37,591
Loss on extinguishment of debt		0	0	(21,828)	0
Corporate
Income before provision for income taxes:
Income before provision for income taxes		(9,320)	(7,939)	(18,326)	(15,743)
California
Operating revenue
Total operating revenue	[1]	149,350	101,795	231,317	197,679
California | Reportable Operating Segments
Income before provision for income taxes:
Income before provision for income taxes		16,430	7,965	22,757	17,888
Arizona
Operating revenue
Total operating revenue		52,372	35,594	79,088	56,641
Arizona | Reportable Operating Segments
Income before provision for income taxes:
Income before provision for income taxes		5,416	3,496	7,714	4,995
Nevada
Operating revenue
Total operating revenue		29,934	48,655	60,482	79,396
Nevada | Reportable Operating Segments
Income before provision for income taxes:
Income before provision for income taxes		1,247	4,738	3,439	7,296
Colorado
Operating revenue
Total operating revenue		31,008	24,176	52,338	50,569
Colorado | Reportable Operating Segments
Income before provision for income taxes:
Income before provision for income taxes		1,254	872	1,550	1,301
Washington
Operating revenue
Total operating revenue		70,261	37,364	113,735	70,265
Washington | Reportable Operating Segments
Income before provision for income taxes:
Income before provision for income taxes		3,771	2,445	4,085	3,868
Oregon
Operating revenue
Total operating revenue		89,767	78,069	144,586	135,528
Oregon | Reportable Operating Segments
Income before provision for income taxes:
Income before provision for income taxes		$ 10,658	$ 11,028	$ 15,139	$ 17,986

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