Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 segment	Jan. 01, 2019 USD ($)	Jan. 01, 2018 USD ($)
Segment Reporting Information [Line Items]
Cumulative effect of accounting change \| $			$ (7,354)
All HomeBuilding Segments
Segment Reporting Information [Line Items]
Number of brands in portfolio \| segment	6
Number of states entity operates \| segment	10
ASU 2016-02
Segment Reporting Information [Line Items]
Cumulative effect of accounting change \| $		$ 57,400