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Commitments And Contingencies (Narrative) (Details) (USD $)
 3 Months Ended 9 Months Ended 24 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2007
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Commitments and Contingencies Disclosure [Abstract]                
Total Mortgage Loans Originated       $ 39,500,000,000        
Percentage of loan origination repurchase requests in which Company is able to cure or refute the claim   60.00%            
Actual Loss Severities Percentage on Mortgage Repurchase Requests   50.00%            
Loss Contingencies [Line Items]                
Maximum product warranty in years   10            
Accrued liabilities for outstanding community development district obligations 35,700,000 35,700,000       38,400,000    
Aggregate Principal Balance of Community Development District Obligations Repurchased 0 0 26,600,000          
Discount on repurchases of community development district obligations     5,200,000          
Letters of Credit Outstanding, Amount 190,700,000 190,700,000       235,900,000    
Surety Bonds Outstanding 1,100,000,000 1,100,000,000       1,200,000,000    
Number of self-insurance claims managed at any one time 1,000 1,000            
Self-insurance liabilities 723,826,000 723,826,000 756,400,000   733,042,000 739,029,000 759,714,000 787,918,000
Incurred but not reported percentage of liability reserves 79.00% 79.00%            
Residential mortgage backed securities known [Member]
                
Loss Contingencies [Line Items]                
Residential mortgage-backed securities principal sold in previous period 162,000,000 162,000,000            
Residential mortgage backed securities other [Member]
                
Loss Contingencies [Line Items]                
Residential mortgage-backed securities principal sold in previous period $ 116,000,000 $ 116,000,000