Inventory - Inventory Fair Value Unobservable Inputs (Details) $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($) home community
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Average selling price ($000s)	$ 253
Sales pace per quarter (units) \| community	5
Discount rate	18.00%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Average selling price ($000s)	$ 461
Sales pace per quarter (units) \| home	9
Discount rate	25.00%

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration