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Basis Of Presentation And Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Unfunded settlements $ 13,600,000   $ 13,600,000   $ 8,100,000
Litigation Settlement, Expense 8,000,000   38,000,000    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 10.3 12.0 10.5 18.8  
Land, not owned, under option agreements 27,612,000   27,612,000   31,066,000
Liabilities for land, not owned, under option agreements 27,612,000   27,612,000   31,066,000
Residential mortgage loans available-for-sale fair value 296,922,000   296,922,000   318,931,000
Residential mortgage loans available-for-sale aggregate outstanding principal balance 285,900,000   285,900,000   305,300,000
Net gain (loss) from change in fair value 4,400,000 900,000 2,600,000 600,000  
Net gains from the sale of mortgages 18,100,000 33,900,000 66,400,000 76,900,000  
Maximum [Member]
          
Variability in future cash flows of derivative instruments in days     75 days    
Interest Rate Lock Commitments [Member]
          
Derivative, Notional Amount 317,700,000   317,700,000   161,600,000
Forward Contracts [Member]
          
Derivative, Notional Amount 519,600,000   519,600,000   428,000,000
Whole Loan Commitments [Member]
          
Derivative, Notional Amount 30,200,000   30,200,000   4,700,000
Contract Termination [Member] | Financial Services [Member]
          
Lease exit and related costs $ 0   $ 0 $ 2,500,000