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Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Unfunded settlements $ 3,700,000 $ 8,100,000  
Intangible asset useful life 20 years    
Intangible assets, acquired cost (gross) 259,000,000 259,000,000  
Intangible assets, accumulated amortization 122,900,000 109,800,000  
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 53,051,000 44,183,000  
Property and equipment, accumulated depreciation 182,000,000 190,100,000  
Depreciation Expense 18,500,000 16,900,000 19,000,000
Advertising Expense 42,400,000 45,800,000 55,100,000
Employee benefit plan company contributions 11,000,000 9,400,000  
Charges related to contractual dispute 41,200,000    
Provision for Doubtful Accounts   5,100,000 17,100,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 9.6 16.6  
Number of VIEs requiring consolidation 0 0  
Land, not owned, under option agreements 24,024,000 31,066,000  
Residential mortgage loans available-for-sale 287,933,000 318,931,000  
Residential mortgage loans available-for-sale aggregate outstanding principal balance 278,100,000 305,300,000  
Net gain (loss) from change in fair value (1,200,000) (200,000)  
Net gains from the sale of mortgages 80,300,000 109,200,000 59,100,000
Loans held for investment, net 11,000,000 1,300,000  
Days past contractual term once loans no longer accrue interest income 90 days    
Variability in future cash flows of derivative instruments in days 75 days    
Furniture and Fixtures [Member]
      
Property and equipment, useful life 2 years    
Minimum [Member]
      
Period of Reimbursement of Payments on Loan Prepay in Days 90 days    
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] | Equipment [Member]
      
Property and equipment, useful life 10 years    
Financial Services [Member]
      
Interest income on mortgage loans 7,500,000 6,000,000 5,000,000
Interest Rate Lock Commitments [Member]
      
Derivative, notional amount 175,700,000 161,600,000  
Forward Contracts [Member]
      
Derivative, notional amount 381,500,000 428,000,000  
Whole Loan Commitments [Member]
      
Derivative, notional amount $ 31,700,000 $ 4,700,000