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Basis Of Presentation And Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Unfunded settlements $ 8,200,000   $ 8,200,000   $ 8,100,000
Litigation Settlement, Expense 30,000,000   30,000,000    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 10.3 21.9 10.5 22.2  
Land, not owned, under option agreements 33,751,000   33,751,000   31,066,000
Liabilities for land, not owned, under option agreements 33,751,000   33,751,000   31,066,000
Residential mortgage loans available-for-sale fair value 237,595,000   237,595,000   318,931,000
Residential mortgage loans available-for-sale aggregate outstanding principal balance 238,200,000   238,200,000   305,300,000
Net gain (loss) from change in fair value (2,000,000) 200,000 (1,800,000) (300,000)  
Net gains from the sale of mortgages 24,400,000 24,100,000 48,300,000 43,100,000  
Maximum [Member]
          
Variability in future cash flows of derivative instruments in days     60 days    
Interest Rate Lock Commitments [Member]
          
Derivative, Notional Amount 279,900,000   279,900,000   161,600,000
Forward Contracts [Member]
          
Derivative, Notional Amount 458,300,000   458,300,000   428,000,000
Whole Loan Commitments [Member]
          
Derivative, Notional Amount 18,600,000   18,600,000   4,700,000
Contract Termination [Member] | Financial Services [Member]
          
Lease exit and related costs $ 0 $ 100,000 $ 0 $ 2,500,000