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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, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Unfunded settlements $ 13,400,000   $ 13,400,000   $ 13,000,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 21.9 0 22.2 0  
Number of VIEs requiring consolidation 0   0   0
Land, not owned, under option agreements 10,482,000   10,482,000   24,905,000
Liabilities for land, not owned, under option agreements 10,482,000   10,482,000   24,905,000
Residential mortgage loans available-for-sale fair value 234,334,000   234,334,000   258,075,000
Residential mortgage loans available-for-sale aggregate outstanding principal balance 223,700,000   223,700,000   248,200,000
Net gain (loss) from change in fair value 200,000 (1,900,000) (300,000) (1,400,000)  
Net gains from the sale of mortgages 24,100,000 12,300,000 43,100,000 25,100,000  
Servicing rights recognized 3,900,000 3,800,000 8,500,000 8,700,000  
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 100,000 100,000 2,500,000 100,000  
Interest Rate Lock Commitments [Member]
         
Derivative, Notional Amount 194,800,000   194,800,000   97,600,000
Forward Contracts [Member]
         
Derivative, Notional Amount 384,500,000   384,500,000   311,500,000
Whole Loan Commitments [Member]
         
Derivative, Notional Amount $ 3,100,000   $ 3,100,000   $ 1,600,000