Supplemental Guarantor Information Supplemental Guarantor Information - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
ASSETS:
Cash, cash equivalents and restricted cash	$ 33,451		$ 21,529	$ 36,360	$ 151,703
Mortgage loans held for sale	128,322		169,651
Inventory	1,827,068		1,674,460
Property and equipment - net	27,621		29,395
Investment in joint venture arrangements	47,557		35,870
Operating lease right-of-use assets	19,059	$ 20,900	0
Deferred income tax asset	11,988		13,482
Investment in subsidiaries	0		0
Intercompany assets	0		0
Goodwill	16,400		16,400
Other assets	70,137		60,794
Total assets	2,181,603		2,021,581
LIABILITIES:
Accounts payable	169,528		131,511
Customer deposits	36,250		32,055
Operating lease liabilities	19,059	$ 20,889	0
Intercompany liabilities	0		0
Other liabilities	131,434		150,051
Community development district obligations	14,328		12,392
Obligation for consolidated inventory not owned	6,687		19,308
Notes payable bank - homebuilding operations	189,900		117,400
Notes payable bank - financial service operations	108,594		153,168
Notes payable - other	5,508		5,938
Senior notes due 2021 - net	298,712		297,884
Senior notes due 2025 - net	246,962		246,571
TOTAL LIABILITIES	1,226,962		1,166,278
TOTAL SHAREHOLDERS' EQUITY	954,641		855,303
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,181,603		2,021,581
Consolidation, Eliminations [Member]
ASSETS:
Cash, cash equivalents and restricted cash	0		0	0	0
Mortgage loans held for sale	0		0
Inventory	0		0
Property and equipment - net	0		0
Investment in joint venture arrangements	0		0
Operating lease right-of-use assets	0
Deferred income tax asset	0		0
Investment in subsidiaries	(894,263)		(817,986)
Intercompany assets	(604,413)		(579,447)
Goodwill	0		0
Other assets	0		0
Total assets	(1,498,676)		(1,397,433)
LIABILITIES:
Accounts payable	0		0
Customer deposits	0		0
Operating lease liabilities	0
Intercompany liabilities	(604,413)		(579,447)
Other liabilities	0		0
Community development district obligations	0		0
Obligation for consolidated inventory not owned	0		0
Notes payable bank - homebuilding operations	0		0
Notes payable bank - financial service operations	0		0
Notes payable - other	0		0
Senior notes due 2021 - net	0		0
Senior notes due 2025 - net	0		0
TOTAL LIABILITIES	(604,413)		(579,447)
TOTAL SHAREHOLDERS' EQUITY	(894,263)		(817,986)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	(1,498,676)		(1,397,433)
Parent Company [Member]
ASSETS:
Cash, cash equivalents and restricted cash	0		0	0	0
Mortgage loans held for sale	0		0
Inventory	0		0
Property and equipment - net	0		0
Investment in joint venture arrangements	0		0
Operating lease right-of-use assets	0
Deferred income tax asset	0		0
Investment in subsidiaries	894,263		817,986
Intercompany assets	604,413		579,447
Goodwill	0		0
Other assets	1,639		2,325
Total assets	1,500,315		1,399,758
LIABILITIES:
Accounts payable	0		0
Customer deposits	0		0
Operating lease liabilities	0
Intercompany liabilities	0		0
Other liabilities	0		0
Community development district obligations	0		0
Obligation for consolidated inventory not owned	0		0
Notes payable bank - homebuilding operations	0		0
Notes payable bank - financial service operations	0		0
Notes payable - other	0		0
Senior notes due 2021 - net	298,712		297,884
Senior notes due 2025 - net	246,962		246,571
TOTAL LIABILITIES	545,674		544,455
TOTAL SHAREHOLDERS' EQUITY	954,641		855,303
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,500,315		1,399,758
Guarantor Subsidiaries [Member]
ASSETS:
Cash, cash equivalents and restricted cash	19,366		5,554	21,494	131,522
Mortgage loans held for sale	0		0
Inventory	1,827,068		1,674,460
Property and equipment - net	26,794		28,485
Investment in joint venture arrangements	44,946		33,297
Operating lease right-of-use assets	15,716
Deferred income tax asset	11,988		13,482
Investment in subsidiaries	0		0
Intercompany assets	0		0
Goodwill	16,400		16,400
Other assets	56,200		47,738
Total assets	2,018,478		1,819,416
LIABILITIES:
Accounts payable	168,950		131,089
Customer deposits	36,250		32,055
Operating lease liabilities	15,718
Intercompany liabilities	600,611		578,498
Other liabilities	126,285		140,860
Community development district obligations	14,328		12,392
Obligation for consolidated inventory not owned	6,687		19,308
Notes payable bank - homebuilding operations	189,900		117,400
Notes payable bank - financial service operations	0		0
Notes payable - other	5,508		5,938
Senior notes due 2021 - net	0		0
Senior notes due 2025 - net	0		0
TOTAL LIABILITIES	1,164,237		1,037,540
TOTAL SHAREHOLDERS' EQUITY	854,241		781,876
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,018,478		1,819,416
Non-Guarantor Subsidiaries [Member]
ASSETS:
Cash, cash equivalents and restricted cash	14,085		15,975	$ 14,866	$ 20,181
Mortgage loans held for sale	128,322		169,651
Inventory	0		0
Property and equipment - net	827		910
Investment in joint venture arrangements	2,611		2,573
Operating lease right-of-use assets	3,343
Deferred income tax asset	0		0
Investment in subsidiaries	0		0
Intercompany assets	0		0
Goodwill	0		0
Other assets	12,298		10,731
Total assets	161,486		199,840
LIABILITIES:
Accounts payable	578		422
Customer deposits	0		0
Operating lease liabilities	3,341
Intercompany liabilities	3,802		949
Other liabilities	5,149		9,191
Community development district obligations	0		0
Obligation for consolidated inventory not owned	0		0
Notes payable bank - homebuilding operations	0		0
Notes payable bank - financial service operations	108,594		153,168
Notes payable - other	0		0
Senior notes due 2021 - net	0		0
Senior notes due 2025 - net	0		0
TOTAL LIABILITIES	121,464		163,730
TOTAL SHAREHOLDERS' EQUITY	40,022		36,110
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 161,486		$ 199,840