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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, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Unfunded settlements $ 17,000,000   $ 17,000,000   $ 13,000,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 12.0 0 18.8 0  
Number of VIEs requiring consolidation 0   0   0
Land, not owned, under option agreements 11,054,000   11,054,000   24,905,000
Liabilities for land, not owned, under option agreements 11,054,000   11,054,000   24,905,000
Residential mortgage loans available-for-sale fair value 263,378,000   263,378,000   258,075,000
Residential mortgage loans available-for-sale aggregate outstanding principal balance 248,000,000   248,000,000   248,200,000
Net gain (loss) from change in fair value 900,000 800,000 600,000 (600,000)  
Net gains from the sale of mortgages 33,900,000 16,100,000 76,900,000 41,200,000  
Servicing rights recognized 4,800,000 1,900,000 13,300,000 10,600,000  
Minimum [Member]
          
Period of Reimbursement of Payments on Loan Prepay in Days     90    
Maximum [Member]
          
Period of Reimbursement of Payments on Loan Prepay in Days     120    
Variability in future cash flows of derivative instruments in days 60 days        
Financial Services [Member]
          
Lease exit and related costs     2,500,000    
Interest Rate Lock Commitments [Member]
          
Derivative, Notional Amount 273,500,000   273,500,000   97,600,000
Forward Contracts [Member]
          
Derivative, Notional Amount 481,600,000   481,600,000   311,500,000
Whole Loan Commitments [Member]
          
Derivative, Notional Amount $ 3,000,000   $ 3,000,000   $ 1,600,000