Segment Information - Summary of Segment Financial Information Relating to Operations (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating revenue:
Total operating revenue		$ 397,162	$ 246,811	$ 247,740	$ 189,715	$ 352,479	$ 196,305	$ 169,868	$ 140,299	$ 1,106,552	$ 896,679	$ 572,535
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										87,067	78,323	53,301
California
Operating revenue:
Total operating revenue	[1]									404,434	536,908	295,022
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										46,752	84,379	50,052
Arizona
Operating revenue:
Total operating revenue										69,510	59,195	129,089
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										5,743	6,112	17,861
Nevada
Operating revenue:
Total operating revenue										130,845	121,815	78,148
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										13,022	9,925	9,180
Colorado
Operating revenue:
Total operating revenue										107,014	46,460	70,276
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										3,291	(271)	736
Washington
Operating revenue:
Total operating revenue										181,258	65,886	0
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										18,652	6,483	0
Oregon
Operating revenue:
Total operating revenue										213,491	66,415	0
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										24,787	5,498	0
Corporate
Income before (provision) benefit for income taxes:
Income before (provision) benefit from income taxes										$ (25,180)	$ (33,803)	$ (24,528)

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