Senior Notes, Secured, and Unsecured Indebtedness - Condensed Consolidating Statement of Operations (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenue
Operating revenue	$ 465,469,000		$ 519,452,000		$ 921,333,000	$ 892,820,000
Operating costs
Sales and marketing	(25,366,000)		(28,848,000)		(50,643,000)	(51,541,000)
General and administrative	(29,472,000)		(28,507,000)		(58,598,000)	(53,028,000)
Other	(695,000)		(621,000)		(1,039,000)	(919,000)
Total operating costs	(446,801,000)		(485,284,000)		(884,561,000)	(844,217,000)
Income from subsidiaries	0		0		0	0
Operating income (loss)	18,668,000		34,168,000		36,772,000	48,603,000
Equity in income of unconsolidated joint ventures — Note 5	1,378,000		533,000		2,290,000	1,465,000
(Loss) income from financial services operations	(1,222,000)		0		(1,222,000)	0
Transaction expenses	0		(777,000)		0	(3,907,000)
Financial services income (loss)	(834,000)		533,000		78,000	1,465,000
Other income (loss), net	453,000		311,000		1,084,000	346,000
Income before extinguishment of debt	18,287,000		35,012,000		37,934,000	50,414,000
Gain on extinguishment of debt	0		0		383,000	0
Income (loss) before provision for income taxes	18,287,000		35,012,000		38,317,000	50,414,000
Provision for income taxes	(3,857,000)		(7,776,000)		(8,753,000)	(10,590,000)
Net income (loss)	14,430,000	$ 15,134,000	27,236,000	$ 12,588,000	29,564,000	39,824,000
Less: Net income attributable to noncontrolling interests	(3,979,000)		(4,781,000)		(10,994,000)	(9,041,000)
Net income available to common stockholders	10,451,000		22,455,000		18,570,000	30,783,000
Financial Services
Operating costs
Equity in income of unconsolidated joint ventures — Note 5	1,378,000				2,290,000
(Loss) income from financial services operations	(1,222,000)				(1,222,000)
Transaction expenses	(990,000)				(990,000)
Financial services income (loss)	(834,000)				78,000
Reporting Entities
Operating costs
Sales and marketing						(16,083,000)
General and administrative						(37,868,000)
Other						(1,033,000)
Total operating costs						(286,419,000)
Income from subsidiaries						13,622,000
Operating income (loss)						9,147,000
Equity in income of unconsolidated joint ventures — Note 5						964,000
Transaction expenses						(3,907,000)
Provision for income taxes						(10,590,000)
Net income (loss)						542,000
Less: Net income attributable to noncontrolling interests						0
Net income available to common stockholders						542,000
Reporting Entities | Guarantor Subsidiaries
Operating revenue
Operating revenue	306,146,000		317,072,000		551,591,000	500,999,000
Operating costs
Sales and marketing	(16,539,000)		(17,663,000)		(31,275,000)	(28,446,000)
General and administrative	(8,046,000)		(9,192,000)		(17,003,000)	(15,158,000)
Other	572,000		38,000		572,000	84,000
Total operating costs	(283,772,000)		(291,908,000)		(517,028,000)	(460,096,000)
Income from subsidiaries	0		0		0	0
Operating income (loss)	22,374,000		25,164,000		34,563,000	40,903,000
Equity in income of unconsolidated joint ventures — Note 5			244,000			501,000
Transaction expenses			0		0	0
Other income (loss), net	8,000		(5,000)		89,000	51,000
Income before extinguishment of debt					35,174,000
Gain on extinguishment of debt					0
Income (loss) before provision for income taxes	22,703,000		25,403,000		35,174,000	41,455,000
Provision for income taxes	0		0		0	0
Net income (loss)	22,703,000		25,403,000		35,174,000	41,455,000
Less: Net income attributable to noncontrolling interests	0		0		0	0
Net income available to common stockholders	22,703,000		25,403,000		35,174,000	41,455,000
Reporting Entities | Guarantor Subsidiaries | Financial Services
Operating costs
Equity in income of unconsolidated joint ventures — Note 5	321,000				522,000
(Loss) income from financial services operations	0				0
Transaction expenses	0				0
Financial services income (loss)	321,000				522,000
Reporting Entities | Non-Guarantor Subsidiaries
Operating revenue
Operating revenue	65,045,000		52,230,000		126,532,000	106,498,000
Operating costs
Sales and marketing	(2,645,000)		(3,485,000)		(4,760,000)	(7,012,000)
General and administrative	(4,000)		0		(4,000)	(2,000)
Other	34,000		21,000		77,000	30,000
Total operating costs	(54,629,000)		(45,992,000)		(105,156,000)	(94,323,000)
Income from subsidiaries	0		0		0	0
Operating income (loss)	10,416,000		6,238,000		21,376,000	12,175,000
Equity in income of unconsolidated joint ventures — Note 5			0			0
Transaction expenses			0		0	0
Other income (loss), net	(391,000)		(396,000)		(770,000)	(726,000)
Income before extinguishment of debt					18,394,000
Gain on extinguishment of debt					0
Income (loss) before provision for income taxes	7,813,000		5,842,000		18,394,000	11,449,000
Provision for income taxes	0		0		0	0
Net income (loss)	7,813,000		5,842,000		18,394,000	11,449,000
Less: Net income attributable to noncontrolling interests	(3,979,000)		(4,781,000)		(10,994,000)	(9,041,000)
Net income available to common stockholders	3,834,000		1,061,000		7,400,000	2,408,000
Reporting Entities | Non-Guarantor Subsidiaries | Financial Services
Operating costs
Equity in income of unconsolidated joint ventures — Note 5	0				0
(Loss) income from financial services operations	(1,222,000)				(1,222,000)
Transaction expenses	(990,000)				(990,000)
Financial services income (loss)	(2,212,000)				(2,212,000)
Reporting Entities | Delaware Lyon
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Sales and marketing	0		0		0	0
General and administrative	0		0		0	0
Other	0		0		0	0
Total operating costs	0		0		0	0
Income from subsidiaries	10,451,000		22,455,000		18,570,000	30,783,000
Operating income (loss)	10,451,000		22,455,000		18,570,000	30,783,000
Equity in income of unconsolidated joint ventures — Note 5			0			0
Transaction expenses			0		0	0
Other income (loss), net	0		0		0	0
Income before extinguishment of debt					18,570,000
Gain on extinguishment of debt					0
Income (loss) before provision for income taxes	10,451,000		22,455,000		18,570,000	30,783,000
Provision for income taxes	0		0		0	0
Net income (loss)	10,451,000		22,455,000		18,570,000	30,783,000
Less: Net income attributable to noncontrolling interests	0		0		0	0
Net income available to common stockholders	10,451,000		22,455,000		18,570,000	30,783,000
Reporting Entities | Delaware Lyon | Financial Services
Operating costs
Equity in income of unconsolidated joint ventures — Note 5	0				0
(Loss) income from financial services operations	0				0
Transaction expenses	0				0
Financial services income (loss)	0				0
Reporting Entities | California Lyon
Operating revenue
Operating revenue	92,282,000		148,521,000		239,357,000	281,944,000
Operating costs
Sales and marketing	(6,182,000)		(7,700,000)		(14,608,000)
General and administrative	(21,422,000)		(19,315,000)		(41,591,000)
Other	(1,301,000)		(680,000)		(1,688,000)
Total operating costs	(106,404,000)		(145,755,000)		(258,524,000)
Income from subsidiaries	10,684,000		5,515,000		17,610,000
Operating income (loss)	(3,438,000)		8,281,000		(1,557,000)
Equity in income of unconsolidated joint ventures — Note 5			289,000
Transaction expenses			(777,000)		0
Other income (loss), net	836,000		712,000		1,765,000	1,021,000
Income before extinguishment of debt					1,976,000
Gain on extinguishment of debt					383,000
Income (loss) before provision for income taxes	(1,545,000)		9,282,000		2,359,000	11,132,000
Provision for income taxes	(3,857,000)		(7,776,000)		(8,753,000)
Net income (loss)	(5,402,000)		1,506,000		(6,394,000)
Less: Net income attributable to noncontrolling interests	0		0		0
Net income available to common stockholders	(5,402,000)		1,506,000		(6,394,000)
Reporting Entities | California Lyon | Financial Services
Operating costs
Equity in income of unconsolidated joint ventures — Note 5	1,057,000				1,768,000
(Loss) income from financial services operations	0				0
Transaction expenses	0				0
Financial services income (loss)	1,057,000				1,768,000
Consolidation, Eliminations
Operating revenue
Operating revenue	1,996,000		1,629,000		3,853,000	3,379,000
Operating costs
Sales and marketing	0		0		0	0
General and administrative	0		0		0	0
Other	0		0		0	0
Total operating costs	(1,996,000)		(1,629,000)		(3,853,000)	(3,379,000)
Income from subsidiaries	(21,135,000)		(27,970,000)		(36,180,000)	(44,405,000)
Operating income (loss)	(21,135,000)		(27,970,000)		(36,180,000)	(44,405,000)
Equity in income of unconsolidated joint ventures — Note 5			0			0
Transaction expenses			0		0	0
Other income (loss), net	0		0		0	0
Income before extinguishment of debt					(36,180,000)
Gain on extinguishment of debt					0
Income (loss) before provision for income taxes	(21,135,000)		(27,970,000)		(36,180,000)	(44,405,000)
Provision for income taxes	0		0		0	0
Net income (loss)	(21,135,000)		(27,970,000)		(36,180,000)	(44,405,000)
Less: Net income attributable to noncontrolling interests	0		0		0	0
Net income available to common stockholders	(21,135,000)		(27,970,000)		(36,180,000)	(44,405,000)
Consolidation, Eliminations | Financial Services
Operating costs
Equity in income of unconsolidated joint ventures — Note 5	0				0
(Loss) income from financial services operations	0				0
Transaction expenses	0				0
Financial services income (loss)	0				0
Home sales
Operating revenue
Operating revenue	463,517,000		518,432,000		917,292,000	890,817,000
Operating costs
Cost of goods and services sold	(389,483,000)		(425,572,000)		(770,527,000)	(732,880,000)
Home sales | Reporting Entities
Operating costs
Cost of goods and services sold						(227,528,000)
Home sales | Reporting Entities | Guarantor Subsidiaries
Operating revenue
Operating revenue	304,194,000		316,052,000		547,550,000	498,996,000
Operating costs
Cost of goods and services sold	(257,974,000)		(264,132,000)		(465,568,000)	(414,634,000)
Home sales | Reporting Entities | Non-Guarantor Subsidiaries
Operating revenue
Operating revenue	65,045,000		52,230,000		126,532,000	106,498,000
Operating costs
Cost of goods and services sold	(52,014,000)		(42,528,000)		(100,469,000)	(87,339,000)
Home sales | Reporting Entities | Delaware Lyon
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Cost of goods and services sold	0		0		0	0
Home sales | Reporting Entities | California Lyon
Operating revenue
Operating revenue	94,278,000		150,150,000		243,210,000	285,323,000
Operating costs
Cost of goods and services sold	(77,499,000)		(117,283,000)		(200,637,000)
Home sales | Consolidation, Eliminations
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Cost of goods and services sold	(1,996,000)		(1,629,000)		(3,853,000)	(3,379,000)
Construction services
Operating revenue
Operating revenue	1,952,000		1,020,000		4,041,000	2,003,000
Operating costs
Cost of goods and services sold	(1,785,000)		(959,000)		(3,754,000)	(1,942,000)
Construction services | Reporting Entities
Operating costs
Cost of goods and services sold						0
Construction services | Reporting Entities | Guarantor Subsidiaries
Operating revenue
Operating revenue	1,952,000		1,020,000		4,041,000	2,003,000
Operating costs
Cost of goods and services sold	(1,785,000)		(959,000)		(3,754,000)	(1,942,000)
Construction services | Reporting Entities | Non-Guarantor Subsidiaries
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Cost of goods and services sold	0		0		0	0
Construction services | Reporting Entities | Delaware Lyon
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Cost of goods and services sold	0		0		0	0
Construction services | Reporting Entities | California Lyon
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Cost of goods and services sold	0		0		0
Construction services | Consolidation, Eliminations
Operating revenue
Operating revenue	0		0		0	0
Operating costs
Cost of goods and services sold	0		0		0	0
Management fees
Operating revenue
Operating revenue	0		0		0	0
Management fees | Reporting Entities | Guarantor Subsidiaries
Operating revenue
Operating revenue	0		0		0	0
Management fees | Reporting Entities | Non-Guarantor Subsidiaries
Operating revenue
Operating revenue	0		0		0	0
Management fees | Reporting Entities | Delaware Lyon
Operating revenue
Operating revenue	0		0		0	0
Management fees | Reporting Entities | California Lyon
Operating revenue
Operating revenue	1,996,000		1,629,000		3,853,000	3,379,000
Management fees | Consolidation, Eliminations
Operating revenue
Operating revenue	$ 1,996,000		$ 1,629,000		$ 3,853,000	$ 3,379,000