Supplemental Guarantor Information Supplemental Guarantor Information - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
ASSETS:
Cash, cash equivalents and restricted cash	$ 202,512	$ 6,083	$ 33,451	$ 21,529
Mortgage loans held for sale	140,046	155,244
Inventory	1,843,409	1,769,507
Property and equipment - net	25,696	22,118
Investment in joint venture arrangements	34,038	37,885
Operating lease right-of-use assets	52,574	18,415
Deferred Income Tax Assets, Net	9,205	9,631
Investment in subsidiaries	0	0
Intercompany assets	0	0
Goodwill	16,400	16,400
Other assets	96,675	70,311
Total assets	2,420,555	2,105,594
LIABILITIES:
Accounts payable	176,581	125,026
Customer deposits	66,632	34,462
Operating lease liabilities	52,666	18,415
Intercompany liabilities	0	0
Other liabilities	156,390	147,937
Community development district obligations	9,892	13,531
Obligation for consolidated inventory not owned	364	7,934
Notes payable bank - homebuilding operations	0	66,000
Notes payable bank - financial service operations	136,119	136,904
Notes payable - other	5,325	5,828
Senior notes due 2021 - net	0	298,988
Senior notes due 2025 - net	247,483	247,092
Senior notes due 2028 - net	394,363	0
TOTAL LIABILITIES	1,245,815	1,102,117
TOTAL SHAREHOLDERS' EQUITY	1,174,740	1,003,477
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,420,555	2,105,594
Consolidation, Eliminations [Member]
ASSETS:
Cash, cash equivalents and restricted cash	0	(5,725)	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	0
Deferred Income Tax Assets, Net	0	0
Investment in subsidiaries	(1,079,323)	(928,942)
Intercompany assets	(734,269)	(619,204)
Goodwill	0	0
Other assets	0	0
Total assets	(1,813,592)	(1,553,871)
LIABILITIES:
Accounts payable	0	(5,725)
Customer deposits	0	0
Operating lease liabilities	0	0
Intercompany liabilities	(734,269)	(619,204)
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
Senior notes due 2025 - net	0	0
Senior notes due 2028 - net	0
TOTAL LIABILITIES	(734,269)	(624,929)
TOTAL SHAREHOLDERS' EQUITY	(1,079,323)	(928,942)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	(1,813,592)	(1,553,871)
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	0
Deferred Income Tax Assets, Net	0	0
Investment in subsidiaries	1,079,323	928,942
Intercompany assets	734,269	619,204
Goodwill	0	0
Other assets	2,994	1,411
Total assets	1,816,586	1,549,557
LIABILITIES:
Accounts payable	0	0
Customer deposits	0	0
Operating lease liabilities	0	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		298,988
Senior notes due 2025 - net	247,483	247,092
Senior notes due 2028 - net	394,363
TOTAL LIABILITIES	641,846	546,080
TOTAL SHAREHOLDERS' EQUITY	1,174,740	1,003,477
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,816,586	1,549,557
Guarantor Subsidiaries [Member]
ASSETS:
Cash, cash equivalents and restricted cash	156,744	219	19,366	5,554
Mortgage loans held for sale	0	0
Inventory	1,843,409	1,769,507
Property and equipment - net	24,919	21,372
Investment in joint venture arrangements	32,139	35,391
Operating lease right-of-use assets	42,405	15,689
Deferred Income Tax Assets, Net	9,205	9,631
Investment in subsidiaries	0	0
Intercompany assets	0	0
Goodwill	16,400	16,400
Other assets	78,709	56,134
Total assets	2,203,930	1,924,343
LIABILITIES:
Accounts payable	175,668	130,136
Customer deposits	66,632	34,462
Operating lease liabilities	42,497	15,691
Intercompany liabilities	733,275	618,946
Other liabilities	147,478	141,015
Community development district obligations	9,892	13,531
Obligation for consolidated inventory not owned	364	7,934
Notes payable bank - homebuilding operations	0	66,000
Notes payable bank - financial service operations	0	0
Notes payable - other	5,325	5,828
Senior notes due 2021 - net		0
Senior notes due 2025 - net	0	0
Senior notes due 2028 - net	0
TOTAL LIABILITIES	1,181,131	1,033,543
TOTAL SHAREHOLDERS' EQUITY	1,022,799	890,800
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,203,930	1,924,343
Non-Guarantor Subsidiaries [Member]
ASSETS:
Cash, cash equivalents and restricted cash	45,768	11,589	$ 14,085	$ 15,975
Mortgage loans held for sale	140,046	155,244
Inventory	0	0
Property and equipment - net	777	746
Investment in joint venture arrangements	1,899	2,494
Operating lease right-of-use assets	10,169	2,726
Deferred Income Tax Assets, Net	0	0
Investment in subsidiaries	0	0
Intercompany assets	0	0
Goodwill	0	0
Other assets	14,972	12,766
Total assets	213,631	185,565
LIABILITIES:
Accounts payable	913	615
Customer deposits	0	0
Operating lease liabilities	10,169	2,724
Intercompany liabilities	994	258
Other liabilities	8,912	6,922
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	136,119	136,904
Notes payable - other	0	0
Senior notes due 2021 - net		0
Senior notes due 2025 - net	0	0
Senior notes due 2028 - net	0
TOTAL LIABILITIES	157,107	147,423
TOTAL SHAREHOLDERS' EQUITY	56,524	38,142
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 213,631	$ 185,565