Debt (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jan. 15, 2024	Dec. 31, 2022
Debt Instrument [Line Items]
Other notes payable	$ 54,780,000			$ 55,228,000
Current borrowing capacity	1,300,000,000
Maximum borrowing capacity	1,800,000,000
Revolving credit facility	0
Letters of credit outstanding	304,600,000			303,400,000
Line of credit facility, remaining borrowing capacity	945,400,000			946,600,000
Financial Services debt	425,456,000			586,711,000
Joint Venture Debt | Joint Venture
Debt Instrument [Line Items]
Joint venture debt outstanding	$ 79,500,000
Joint Venture Debt | Joint Venture | Joint Venture with 50% Interest
Debt Instrument [Line Items]
Ownership interest	50.00%
Joint Venture Debt | Joint Venture | Joint Venture with 50% Interest
Debt Instrument [Line Items]
Joint venture debt outstanding	$ 40,300,000
Notes Payables
Debt Instrument [Line Items]
Other notes payable	$ 54,800,000			55,200,000
Debt instrument term	4 years
Notes payable issued to acquire land inventory	$ 35,300,000	$ 19,900,000
Senior Notes | Unsecure Senior Notes, Due 2026
Debt Instrument [Line Items]
Open market repurchases	22,000,000
Senior Notes | Unsecure Senior Notes, Due 2027
Debt Instrument [Line Items]
Open market repurchases	43,000,000
Line of Credit | Repurchase Agreement
Debt Instrument [Line Items]
Accordion feature	50,000,000
Financial Services
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	$ 134,500,000			$ 213,300,000
Short-Term Debt, Weighted Average Interest Rate, at Point in Time	7.01%			5.39%
Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility				$ 0
Line of Credit | Financial Services
Debt Instrument [Line Items]
Financial Services debt	$ 425,500,000			$ 586,700,000
Line of Credit | Amendment Effective September 24, 2018 through and including December 25, 2018 | Financial Services
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 560,000,000
Line of Credit | Amendment Effective September 24, 2018 through and including December 25, 2018 | Financial Services | Forecast
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 850,000,000
Maximum | Notes Payables
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.00%
Maximum | Line of Credit | Amendment Effective September 24, 2018 through and including December 25, 2018 | Financial Services
Debt Instrument [Line Items]
Commitment ranges	$ 700,000,000
Minimum | Line of Credit | Amendment Effective September 24, 2018 through and including December 25, 2018 | Financial Services
Debt Instrument [Line Items]
Commitment ranges	$ 600,000,000