Related Party Transactions (Details) $ in Thousands			1 Months Ended	3 Months Ended										12 Months Ended
	Oct. 23, 2017 USD ($)	Jun. 29, 2015 USD ($)	Aug. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) project	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) project	Dec. 31, 2016 USD ($) project	Dec. 31, 2018 project	Dec. 31, 2018	Dec. 31, 2018 investment	Dec. 31, 2015 USD ($)
Related Party Transaction [Line Items]
Debt Instrument, Interest Rate, Stated Percentage																		7.25%
Due from affiliates				$ 1,218				$ 1,060						$ 1,218	$ 1,060
Equity Method Investments, Number								10							10	13	10		10
Investment in and advances to unconsolidated joint ventures				34,330				$ 55,824						34,330	$ 55,824
Equity in net income (loss) of unconsolidated joint ventures														(19,653)	866	$ 7,691
Advances to Affiliate				0				3,800						0	3,800
Deferred Revenue				0				136						0	136
Due to affiliates				0										0
Equity method investment, acquisition of partner's interest	$ 13,600		$ 2,600										$ 20,600
Proceeds from (Repayments of) Notes Payable	$ 0														4,110	15,636
General Partners' Contributed Capital									$ 4,000
Deposits Assets				5,100										5,100
Construction Revenue				42,408	$ 39,240	$ 38,095	$ 43,794	44,217	43,309	$ 47,181	$ 55,617			163,537	190,324	186,507
Fee building				41,275	$ 38,124	$ 37,038	$ 42,699	43,194	$ 41,808	$ 45,899	$ 53,926			159,136	184,827	178,103
Joint Venture Contribution [Member]
Related Party Transaction [Line Items]
Equity in net income (loss) of unconsolidated joint ventures		$ 1,600												200	100
Deferred Revenue																				$ 400
Joint Venture Asset Acquisition [Member]
Related Party Transaction [Line Items]
Deferred Revenue				132										132
Cannery Land Sale [Member]
Related Party Transaction [Line Items]
Deferred Revenue				0				100						0	100
Deferred Profit Contra WIP Balance				243				500						243	500
Profit Participation [Member]
Related Party Transaction [Line Items]
Profit Participation														200
Purchase Agreement, Reimbursement Of Fee Credits														100
Builder Fees [Member]
Related Party Transaction [Line Items]
Due from affiliates				37				100						37	100
Interest Income on Note to Joint Venture [Member]
Related Party Transaction [Line Items]
Debt Instrument, Interest Rate, Stated Percentage																		10.00%
Due from affiliates				0				34						0	34
Revenue from related party														100	500
Board Affiliate [Member] | Bedford 1 [Member]
Related Party Transaction [Line Items]
Deposits Assets				1,500										1,500
Purchase Options, Land				10,000										10,000
Deposits Assets - Outstanding				900										900
Board Affiliate [Member] | Bedford 2 [Member]
Related Party Transaction [Line Items]
Deposits Assets				1,400										1,400
Purchase Options, Land				10,500										10,500
10% Common Stock Affiliate [Member] | Northern CA Phased Takedown [Member]
Related Party Transaction [Line Items]
Deposits Assets				300										300
Purchase Options, Land								16,100							16,100
Master Marking Fees														300
10% Common Stock Affiliate [Member] | Northern CA Rolling Option [Member]
Related Party Transaction [Line Items]
Deposits Assets				5,300										5,300
Estimated Purchase Price														56,300
Land owner fees reimbursed														100
Option Payment														5,900
10% Common Stock Affiliate [Member] | Northern CA Finished Lots [Member]
Related Party Transaction [Line Items]
Purchase Options, Land				8,000										8,000
Master Marking Fees														300
10% Common Stock Affiliate [Member] | Arizona Master Plan [Member]
Related Party Transaction [Line Items]
Deposits Assets				300										300
Purchase Options, Land				3,800										3,800
Gain on Joint Venture Closeout [Member] [Member]
Related Party Transaction [Line Items]
Equity in net income (loss) of unconsolidated joint ventures				300								$ 1,100
Consultant Stelmar [Member] | Monthly consulting fee [Member]
Related Party Transaction [Line Items]
Transaction amount														6
Accounts Payable, Related Parties				0										0
Consultant Davis [Member]
Related Party Transaction [Line Items]
Due from affiliates				600				500						600	500
Construction Revenue														3,000	471
General Contractor Revenue														83	13
Fee building														2,900	500
Consultant Davis [Member] | Consulting Fee [Member]
Related Party Transaction [Line Items]
Transaction amount														5
Accounts Payable, Related Parties				0										0
TL Fab LP [Member] | Trade Payment [Member] | Wholly owned [Member]
Related Party Transaction [Line Items]
Transaction amount														300	600	300
Accounts Payable, Related Parties				7				11						7	11
TL Fab LP [Member] | Trade Payment [Member] | Unconsolidated Joint Ventures [Member]
Related Party Transaction [Line Items]
Transaction amount														400	900	600
Accounts Payable, Related Parties				8				0						8	0
Director [Member]
Related Party Transaction [Line Items]
Equity Method Investments, Number | investment																			3
Director [Member] | Russell Ranch [Member]
Related Party Transaction [Line Items]
Purchase Options, Land								34,000							34,000
Board Member and 10% Beneficial Owner [Member]
Related Party Transaction [Line Items]
Equity Method Investments, Number | investment																			2
Related Party [Member]
Related Party Transaction [Line Items]
The percentage of ownership of common stock entities with investments in Company’s unconsolidated joint ventures hold																		10.00%
Equity Method Investments, Number | investment																			5
Investment in and advances to unconsolidated joint ventures				18,500										18,500
Corporate Joint Venture [Member] | Construction-related Costs [Member]
Related Party Transaction [Line Items]
Expenses from transactions with related party														6,400	7,300	9,400
Due from affiliates				400				100						400	100
Corporate Joint Venture [Member] | Management Fees [Member]
Related Party Transaction [Line Items]
Due from affiliates				200				$ 300						200	300
Revenue from related party																8,200
Gain on Fair Value Remeasurement [Member]
Related Party Transaction [Line Items]
Equity in net income (loss) of unconsolidated joint ventures				$ 100								$ 500
Sponsor [Member] | FMR LLC [Member]
Related Party Transaction [Line Items]
Investment Income, Investment Expense														14	11	0
Participant [Member] | FMR LLC [Member]
Related Party Transaction [Line Items]
Investment Income, Investment Expense														$ 6	$ 4	$ 0