Supplemental Guarantor Information - Unaudited Condensed Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2017
ASSETS
Cash and cash equivalents	$ 158,787		$ 292,147	$ 138,809
Restricted cash	12,783		12,462	$ 14,696
Accounts receivable (net of allowance of $346 and $330, respectively)	30,183		36,323
Income tax receivable	112		88
Owned inventory	1,677,361		1,542,807
Investments in unconsolidated entities	4,293		3,994
Deferred tax assets, net	199,229		307,896
Property and equipment, net	20,166		17,566
Investments in subsidiaries	0		0
Intercompany	0		0
Other assets	4,589		7,712
Total assets	2,107,503	$ 2,220,995	2,220,995
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	117,143		103,484
Other liabilities	97,937		107,659
Intercompany	0		0
Total debt (net of premium of $3,027 and $3,413, respectively, and debt issuance costs of $15,905 and $14,800, respectively)	1,325,457		1,327,412
Total liabilities	1,540,537		1,538,555
Stockholders’ equity	566,966		682,440
Total liabilities and stockholders’ equity	2,107,503		2,220,995
Consolidating Adjustments
ASSETS
Cash and cash equivalents	(7,294)		(7,161)
Restricted cash	0		0
Accounts receivable (net of allowance of $346 and $330, respectively)	0		0
Income tax receivable	0		0
Owned inventory	0		0
Investments in unconsolidated entities	0		0
Deferred tax assets, net	0		0
Property and equipment, net	0		0
Investments in subsidiaries	(737,894)		(808,067)
Intercompany	(801,479)		(608,505)
Other assets	0		0
Total assets	(1,546,667)		(1,423,733)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0		0
Other liabilities	0		0
Intercompany	(808,773)		(615,666)
Total debt (net of premium of $3,027 and $3,413, respectively, and debt issuance costs of $15,905 and $14,800, respectively)	0		0
Total liabilities	(808,773)		(615,666)
Stockholders’ equity	(737,894)		(808,067)
Total liabilities and stockholders’ equity	(1,546,667)		(1,423,733)
Beazer Homes USA, Inc.
ASSETS
Cash and cash equivalents	157,652		283,191
Restricted cash	11,818		11,001
Accounts receivable (net of allowance of $346 and $330, respectively)	0		0
Income tax receivable	112		88
Owned inventory	0		0
Investments in unconsolidated entities	773		773
Deferred tax assets, net	199,229		307,896
Property and equipment, net	0		0
Investments in subsidiaries	737,894		808,067
Intercompany	799,150		606,168
Other assets	803		599
Total assets	1,907,431		2,017,783
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0		0
Other liabilities	16,818		11,229
Intercompany	2,329		2,337
Total debt (net of premium of $3,027 and $3,413, respectively, and debt issuance costs of $15,905 and $14,800, respectively)	1,321,318		1,321,777
Total liabilities	1,340,465		1,335,343
Stockholders’ equity	566,966		682,440
Total liabilities and stockholders’ equity	1,907,431		2,017,783
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	7,735		15,393
Restricted cash	965		1,461
Accounts receivable (net of allowance of $346 and $330, respectively)	30,180		36,322
Income tax receivable	0		0
Owned inventory	1,677,361		1,542,807
Investments in unconsolidated entities	3,520		3,221
Deferred tax assets, net	0		0
Property and equipment, net	20,166		17,566
Investments in subsidiaries	0		0
Intercompany	0		0
Other assets	3,786		7,098
Total assets	1,743,713		1,623,868
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	117,143		103,484
Other liabilities	80,889		96,189
Intercompany	806,444		613,329
Total debt (net of premium of $3,027 and $3,413, respectively, and debt issuance costs of $15,905 and $14,800, respectively)	4,139		5,635
Total liabilities	1,008,615		818,637
Stockholders’ equity	735,098		805,231
Total liabilities and stockholders’ equity	1,743,713		1,623,868
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	694		724
Restricted cash	0		0
Accounts receivable (net of allowance of $346 and $330, respectively)	3		1
Income tax receivable	0		0
Owned inventory	0		0
Investments in unconsolidated entities	0		0
Deferred tax assets, net	0		0
Property and equipment, net	0		0
Investments in subsidiaries	0		0
Intercompany	2,329		2,337
Other assets	0		15
Total assets	3,026		3,077
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0		0
Other liabilities	230		241
Intercompany	0		0
Total debt (net of premium of $3,027 and $3,413, respectively, and debt issuance costs of $15,905 and $14,800, respectively)	0		0
Total liabilities	230		241
Stockholders’ equity	2,796		2,836
Total liabilities and stockholders’ equity	$ 3,026		$ 3,077