Unaudited Condensed Consolidated Statements of Income (Loss) and Unaudited Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Total revenue	$ 511,521	$ 478,588	$ 1,339,188	$ 1,243,297
Home construction and land sales expenses	428,109	399,675	1,119,870	1,043,041
Inventory impairments and abandonments	168	470	168	752
Gross profit	83,244	78,443	219,150	199,504
Commissions	19,535	18,773	51,225	48,728
General and administrative expenses	42,473	40,794	120,610	117,282
Depreciation and amortization	3,656	3,307	9,229	9,139
Operating income	17,580	15,569	38,086	24,355
Equity in income of unconsolidated entities	147	158	302	213
Loss on extinguishment of debt	0	0	(25,904)	(15,563)
Other expense, net	(30)	(2,871)	(4,628)	(12,007)
(Loss) income before income taxes	17,697	12,856	7,856	(3,002)
Expense (benefit) from income taxes	4,268	5,742	113,386	(1,262)
Income (loss) from continuing operations	13,429	7,114	(105,530)	(1,740)
(Loss) income from discontinued operations, net of tax	(20)	9	(450)	(101)
Net income (loss) and comprehensive income (loss)	$ 13,409	$ 7,123	$ (105,980)	$ (1,841)
Weighted average number of shares:
Basic (in shares)	32,147	31,971	32,113	31,944
Diluted (in shares)	32,726	32,375	32,113	31,944
Basic earnings (loss) per share:
Continuing Operations (in dollars per share)	$ 0.42	$ 0.22	$ (3.29)	$ (0.05)
Discontinued Operations (in dollars per share)	0.00	0.00	(0.01)	0.00
Total (in dollars per shares)	0.42	0.22	(3.30)	(0.05)
Diluted income (loss) per share:
Continuing operations (in dollars per share)	0.41	0.22	(3.29)	(0.05)
Discontinued operations (in dollars per share)	0.00	0.00	(0.01)	0.00
Total (in dollar per share)	$ 0.41	$ 0.22	$ (3.30)	$ (0.05)