Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenue	$ 0	$ 0	$ 1,030
Home construction and land sales expenses	72	668	4,518
Gross loss	(72)	(668)	(3,488)
General and administrative expenses	169	137	380
Operating loss	(241)	(805)	(3,868)
Equity in income of unconsolidated entities	31	12	0
Other income, net	(5)	6	5
Loss from discontinued operations before income taxes	(215)	(787)	(3,863)
Benefit from income taxes	(75)	(275)	(1,358)
Loss from discontinued operations, net of tax	$ (140)	$ (512)	(2,505)
Colorado
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Home construction and land sales expenses			$ 3,700