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Basis Of Presentation And Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Unfunded settlements $ 7,300,000   $ 8,100,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 10.0 0  
Land, not owned, under option agreements 38,988,000   31,066,000
Liabilities for land, not owned, under option agreements 38,988,000   31,066,000
Residential mortgage loans available-for-sale fair value 238,204,000   318,931,000
Residential mortgage loans available-for-sale aggregate outstanding principal balance 229,700,000   305,300,000
Net gain (loss) from change in fair value 200,000 500,000  
Net gains from the sale of mortgages 23,900,000 19,000,000  
Maximum [Member]
      
Variability in future cash flows of derivative instruments in days 60 days    
Financial Services [Member]
      
Lease exit and related costs   2,400,000  
Interest Rate Lock Commitments [Member]
      
Derivative, Notional Amount 198,100,000   161,600,000
Forward Contracts [Member]
      
Derivative, Notional Amount 379,100,000   428,000,000
Whole Loan Commitments [Member]
      
Derivative, Notional Amount $ 8,300,000   $ 4,700,000