Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Payments to acquire businesses, gross	$ 0	$ 0	$ 10,400
Goodwill	68,930	68,930
Escrow deposit	21,300	43,200
Restricted cash	40,353	42,594
Finite-Lived Intangible Assets, Net	46,300	56,300
Intangible assets, accumulated amortization	108,300	98,200
Intangible assets amortization expense	10,034	10,538	11,118
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	9,300
Future Amortization Expense, Year Two	8,900
Future Amortization Expense, Year Three	6,500
Future Amortization Expense, Year Four	6,300
Future Amortization Expense, Year Five	4,500
Property and equipment, net	253,097	221,488
Property and equipment, accumulated depreciation	286,800	264,400
Depreciation Expense	79,100	70,300	59,800
Advertising Expense	74,600	57,500	61,600
Employee benefit plan company contributions	31,200	27,800	27,600
Customer deposits	512,580	675,091
Capitalized contract costs	$ 91,100	$ 74,000
Number of VIEs requiring consolidation	0	0
Residential mortgage loans available-for-sale	$ 629,582	$ 516,064
Residential mortgage loans available-for-sale aggregate outstanding principal balance	645,700	508,500
Net gains from the sale of mortgages	$ 235,100	149,800	157,300
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	$ (12,121,964)	(10,383,257)	(8,914,098)	$ (7,489,515)
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	$ 26,800	20,400	14,200
Homebuilding
Number of reportable segments | segment	6
IRLCs
Derivative, Notional Amount	$ 469,400	404,700
Forward contracts
Derivative, Notional Amount	977,000	745,000
Whole loan commitments
Derivative, Notional Amount	$ 237,100	207,900
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	$ (8,694,551)	$ (7,012,724)	$ (5,581,702)	$ (4,196,276)