Basis of Presentation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Customer deposits	$ 769,893		$ 769,893		$ 783,556
Contract asset insurance renewals	70,600		70,600		57,300
Residential mortgage loans available-for-sale fair value	414,360		414,360		677,207
Residential mortgage loans available-for-sale aggregate outstanding principal balance	423,200		423,200		680,500
Net gains from the sale of mortgages	33,700	$ 34,400	$ 102,800	$ 131,900
Variability in future cash flows of derivative instruments in days			90 days
Assets In-Scope Under Accounting Standards Codification 326	207,200		$ 207,200		222,900
Home sale revenues | Homebuilding | Revision of Prior Period, Reclassification, Adjustment
Finite-Lived Intangible Assets [Line Items]
Closing cost incentives		$ 48,800		$ 133,300
Interest rate lock commitments
Finite-Lived Intangible Assets [Line Items]
Derivative, notional amount	674,000		674,000		653,200
Forward contracts
Finite-Lived Intangible Assets [Line Items]
Derivative, notional amount	944,000		944,000		1,000,000
Whole loan commitments
Finite-Lived Intangible Assets [Line Items]
Derivative, notional amount	$ 145,200		$ 145,200		$ 285,900