Inventory - Impairments and Lot Option Abandonment Charges, by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Real Estate, Write-down or Reserve [Line Items]
Inventory Impairment and Abandonment	$ 1,825	$ 0	$ 3,181	$ 0
Continuing Operations
Real Estate, Write-down or Reserve [Line Items]
Impairment of Inventory, Projects in Progress	1,825	0	1,825	0
Land Held for Sale	0	0	568	0
Continuing Operations | West Segment
Real Estate, Write-down or Reserve [Line Items]
Impairment of Inventory, Projects in Progress	1,513	0	1,513	0
Continuing Operations | East Segment
Real Estate, Write-down or Reserve [Line Items]
Land Held for Sale	0	0	197	0
Continuing Operations | Southeast Segment
Real Estate, Write-down or Reserve [Line Items]
Land Held for Sale	0	0	371	0
Abandonments:	0	0	788	0
Continuing Operations | Unallocated
Real Estate, Write-down or Reserve [Line Items]
Impairment of Inventory, Projects in Progress	$ 312	$ 0	$ 312	$ 0