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Fair Value Disclosures (Schedule of Carrying Values and Fair Values of Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and cash equivalents $ 122,840 $ 226,150 $ 405,722
Revolving line of credit  
Mortgage repurchase facilities 212,447 239,298  
Notes payable 1,069,762 1,062,471  
Other Financing Obligations [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable 76,499 69,605  
Senior Notes 3.875% [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts include unamortized deferred financing costs, premiums and discounts $ 4,200 $ 4,300  
Interest rate 3.875% 3.875%  
Senior Notes 6.750% [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts include unamortized deferred financing costs, premiums and discounts $ 2,600 $ 2,800  
Interest rate 6.75% 6.75%  
Construction Loan Agreement [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable $ 60,900 $ 44,900  
Debt, Weighted Average Interest Rate 7.50% 7.40%  
Insurance Premium Notes And Certain Secured Borrowings [Member] | Other Financing Obligations [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable $ 15,600 $ 24,700  
Level 1 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and cash equivalents 122,840 226,150  
Level 1 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and cash equivalents 122,840 226,150  
Level 2 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Revolving line of credit  
Mortgage repurchase facilities 212,447 239,298  
Level 2 [Member] | Carrying Value [Member] | Senior Notes 3.875% [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable 495,849 495,656  
Level 2 [Member] | Carrying Value [Member] | Senior Notes 6.750% [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable 497,414 497,210  
Level 2 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Revolving line of credit  
Mortgage repurchase facilities 212,447 239,298  
Level 2 [Member] | Fair Value [Member] | Senior Notes 3.875% [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable 444,375 436,875  
Level 2 [Member] | Fair Value [Member] | Senior Notes 6.750% [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable 501,250 500,000  
Level 3 [Member] | Carrying Value [Member] | Other Financing Obligations [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable 76,499 69,605  
Level 3 [Member] | Fair Value [Member] | Other Financing Obligations [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes payable $ 76,499 $ 69,605  
Minimum [Member] | Insurance Premium Notes And Certain Secured Borrowings [Member] | Other Financing Obligations [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Interest rate 5.00% 4.80%  
Maximum [Member] | Insurance Premium Notes And Certain Secured Borrowings [Member] | Other Financing Obligations [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Interest rate 7.70% 7.70%