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Basis Of Presentation And Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Unfunded settlements $ 8,100,000 $ 13,000,000  
Intangible asset useful life   20 years  
Intangible assets, acquired cost (gross) 259,000,000 259,000,000  
Intangible assets, accumulated amortization 109,800,000 96,700,000  
Intangible assets amortization expense 13,100,000 13,100,000 13,100,000
Future Amortization Expense, Year One 13,100,000    
Future Amortization Expense, Year Two 13,100,000    
Future Amortization Expense, Year Three 13,100,000    
Future Amortization Expense, Year Four 13,100,000    
Future Amortization Expense, Year Five 13,100,000    
Intangible asset impairment expense 0 0 0
Property and equipment, net 44,183,000 53,182,000  
Property and equipment, accumulated depreciation 190,100,000 203,400,000  
Depreciation Expense 16,900,000 19,000,000 32,500,000
Advertising Expense 45,800,000 55,100,000 54,900,000
Employee benefit plan company contributions 9,400,000    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 16.6    
Earnings attributable to restricted shareholders 0 0 0
Number of VIEs requiring consolidation 0 0  
Land, not owned, under option agreements 31,066,000 24,905,000  
Liability for land, not owned, under option agreements 31,066,000 24,905,000  
Residential mortgage loans available-for-sale 318,931,000 258,075,000  
Residential mortgage loans available-for-sale aggregate outstanding principal balance 305,300,000 248,200,000  
Net gain (loss) from change in fair value (200,000) (400,000)  
Net gains from the sale of mortgages 109,200,000 59,100,000 66,000,000
Loans held for investment, net 1,300,000 2,400,000  
Loans held for investment, reserve 1,400,000 1,900,000  
Days past contractual term once loans no longer accrue interest income 90 days    
Variability in future cash flows of derivative instruments in days 60 days    
Minimum [Member]
      
Period of Reimbursement of Payments on Loan Prepay in Days 90 days    
Minimum [Member] | Vehicles [Member]
      
Property and equipment, useful life 3 years    
Minimum [Member] | Furniture and Fixtures [Member]
      
Property and equipment, useful life 2 years    
Minimum [Member] | Equipment [Member]
      
Property and equipment, useful life 3 years    
Maximum [Member]
      
Period of Reimbursement of Payments on Loan Prepay in Days 120 days    
Maximum [Member] | Vehicles [Member]
      
Property and equipment, useful life 7 years    
Maximum [Member] | Furniture and Fixtures [Member]
      
Property and equipment, useful life 3 years    
Maximum [Member] | Equipment [Member]
      
Property and equipment, useful life 10 years    
Financial Services [Member]
      
Lease exit and related costs 500,000 100,000 2,900,000
Interest income on mortgage loans 6,000,000 5,000,000 5,800,000
Interest Rate Lock Commitments [Member]
      
Derivative, notional amount 161,600,000 97,600,000  
Forward Contracts [Member]
      
Derivative, notional amount 428,000,000 311,500,000  
Whole Loan Commitments [Member]
      
Derivative, notional amount $ 4,700,000 $ 1,600,000