Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Total revenue	$ 489,413	$ 421,260	$ 907,217	$ 823,300
Home construction and land sales expenses	410,568	356,329	765,235	696,707
Inventory impairments and abandonments	0	147,611	0	148,618
Gross profit (loss)	78,845	(82,680)	141,982	(22,025)
Commissions	18,744	15,998	34,809	31,735
General and administrative expenses	40,050	37,372	79,749	76,014
Depreciation and amortization	3,627	2,900	7,054	5,670
Operating income (loss)	16,424	(138,950)	20,370	(135,444)
Equity in income of unconsolidated entities	147	81	134	17
Gain on extinguishment of debt	0	216	0	216
Other expense, net	(1,786)	(337)	(3,126)	(379)
Income (loss) from continuing operations before income taxes	14,785	(138,990)	17,378	(135,590)
Expense (benefit) from income taxes	4,170	(38,158)	3,959	(42,080)
Income (loss) from continuing operations	10,615	(100,832)	13,419	(93,510)
Loss from discontinued operations, net of tax	(1)	(30)	(59)	(41)
Net income (loss)	$ 10,614	$ (100,862)	$ 13,360	$ (93,551)
Weighted average number of shares:
Basic (in shares)	29,868	30,714	29,808	31,263
Diluted (in shares)	29,975	30,714	30,078	31,263
Basic income (loss) per share:
Continuing Operations (in dollars per share)	$ 0.36	$ (3.28)	$ 0.45	$ (2.99)
Discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Total (in dollars per share)	0.36	(3.28)	0.45	(2.99)
Diluted income (loss) per share:
Continuing operations (in dollars per share)	0.35	(3.28)	0.45	(2.99)
Discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Total (in dollars per share)	$ 0.35	$ (3.28)	$ 0.45	$ (2.99)