Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands		12 Months Ended
	Apr. 23, 2019	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Payments to acquire businesses, gross		$ 0	$ 10,400	$ 10,400
Goodwill		68,930	68,930
Escrow deposit		43,200	42,900
Restricted cash		42,594	41,449
Finite-Lived Intangible Assets, Net		56,300	66,900
Intangible assets, accumulated amortization		98,200	87,700
Intangible assets amortization expense		10,538	11,118	16,502
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		10,000
Future Amortization Expense, Year Two		9,300
Future Amortization Expense, Year Three		8,900
Future Amortization Expense, Year Four		6,500
Future Amortization Expense, Year Five		6,300
Property and equipment, net		221,488	200,262
Property and equipment, accumulated depreciation		264,400	242,300
Depreciation Expense		70,300	59,800	53,500
Advertising Expense		57,500	61,600	47,200
Employee benefit plan company contributions		27,800	27,600	23,400
Customer deposits		675,091	783,556
Capitalized contract costs		$ 74,000	$ 57,300
Number of VIEs requiring consolidation		0	0
Residential mortgage loans available-for-sale		$ 516,064	$ 677,207
Residential mortgage loans available-for-sale aggregate outstanding principal balance		508,500	680,500
Net gains from the sale of mortgages		$ 149,800	157,300	251,300
Days past contractual term once loans no longer accrue interest income		90 days
Variability in future cash flows of derivative instruments in days		90 days
Stockholders' Equity Attributable to Parent		$ (10,383,257)	(8,914,098)	(7,489,515)	$ (6,569,989)
Number of reportable segments | segment		6
Minimum | Office Furniture and Equipment [Member]
Property and equipment, useful life		3 years
Minimum | Software and Hardware [Member]
Property and equipment, useful life		3 years
Minimum | Model Park Improvements and Furnishings [Member]
Property and equipment, useful life		1 year
Maximum | Office Furniture and Equipment [Member]
Property and equipment, useful life		10 years
Maximum | Software and Hardware [Member]
Property and equipment, useful life		5 years
Maximum | Model Park Improvements and Furnishings [Member]
Property and equipment, useful life		5 years
Financial Services
Interest income on mortgage loans		$ 20,400	14,200	10,000
Other Homebuilding [Member]
Goodwill, Impaired, Accumulated Impairment Loss		40,400
Florida [Member]
Goodwill		28,600
Goodwill, Impaired, Accumulated Impairment Loss		(20,200)
Homebuilding | Home sale revenues | Revision of Prior Period, Reclassification, Adjustment
Closing Cost Incentives			226,000	189,900
IRLCs
Derivative, Notional Amount		404,700	653,200
Forward contracts
Derivative, Notional Amount		745,000	1,000,000
Whole loan commitments
Derivative, Notional Amount		$ 207,900	285,900
American West Homes [Member] [Member] | Trade Names [Member]
Weighted average useful life (in years)	20 years
JW Homes (Wieland) [Member]
Goodwill			68,900
Restricted stock [Member]
Share-based compensation vesting period		3 years
Retained Earnings
Stockholders' Equity Attributable to Parent		$ (7,012,724)	$ (5,581,702)	$ (4,196,276)	$ (3,306,057)