Inventory - Recoverability Schedule of Inventory Assets Held for Development, by Reportable Segment (Details)	3 Months Ended
Dec. 31, 2015 home	Dec. 31, 2014 property
Real Estate Properties [Line Items]
Number of Communities on Watch List	0	2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration