Basis of Presentation and Significant Accounting Policies (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) segment board_seat individual	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Class of Stock [Line Items]
Ownership percentage by parent	50.00%
Percentage of voting interest	51.00%
Board seats held | board_seat	2
Board seats available | board_seat	3
Number of individuals required to give approval of an action to the board of managers | individual	1
Ownership percentage by noncontrolling owners	50.00%
Assets of VIEs that can be used only to settle obligations of the VIEs	$ 49,000,000		$ 52,200,000
Number of reportable segments | segment	2
Number of operating segments | segment	2
Cumulative effect on opening balance of retained earnings	$ 137,106,000		125,903,000	[1]
Property and equipment, net	2,108,000		804,000	[1]
Inventory	528,499,000		495,655,000	[1]
Depreciation expense	402,000	$ 88,000
Selling, General and Administrative Expense
Class of Stock [Line Items]
Depreciation expense	300,000
Calculated under Revenue Guidance in Effect before Topic 606 | Cost of Sales
Class of Stock [Line Items]
Depreciation expense		$ 200,000
Model Home Furnishings
Class of Stock [Line Items]
Property and equipment, net	1,300,000
Model Home Furnishings | Calculated under Revenue Guidance in Effect before Topic 606
Class of Stock [Line Items]
Inventory			1,100,000
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Class of Stock [Line Items]
Cumulative effect on opening balance of retained earnings			0
Cash
Class of Stock [Line Items]
Assets of VIEs that can be used only to settle obligations of the VIEs	800,000		900,000
Inventories
Class of Stock [Line Items]
Assets of VIEs that can be used only to settle obligations of the VIEs	$ 44,000,000		$ 47,800,000

[1] The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.