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Commitments And Contingencies (Narrative) (Details) (USD $)
 3 Months Ended 12 Months Ended 24 Months Ended
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2007
Dec. 31, 2008
Loss Contingencies [Line Items]                  
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%        
Loan origination liabilities assumed in business combination         0 0 56,293,000    
Reserves for potential claims under mortgage reinsurance programs 7,600,000       2,800,000 7,600,000      
Accrued liabilities for outstanding community development district obligations 73,334,000       38,440,000 73,334,000      
Aggregate Principal Balance of Community Development District Obligations Repurchased         26,600,000 124,100,000      
Discount on repurchases of community development district obligations         5,200,000 12,900,000      
Letters of Credit Outstanding, Amount 388,900,000       235,900,000 388,900,000      
Surety Bonds Outstanding 1,300,000,000       1,200,000,000 1,300,000,000      
Maximum product warranty in years         10        
Self-insurance liabilities 785,562,000       741,383,000 785,562,000 551,020,000   323,227,000
Incurred but not reported percentage of liability reserves 78.00%       78.00% 78.00%      
Adjustment to self insurance reserves (11,400,000) 272,200,000 9,600,000 10,000,000   280,400,000      
Adjustment to insurance reserve per basic and diluted share           $ 0.74      
Liabilities assumed with merger         0 2,514,000 271,071,000    
Residential mortgage backed securities known [Member]
                  
Loss Contingencies [Line Items]                  
Residential mortgage-backed securities principal sold in previous period         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