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Fair Value Disclosures Fair Value Disclosures (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes $ 2,056,657 [1] $ 2,509,613 [1]
Measured at fair value on a recurring basis:    
Residential mortgage loans available-for-sale 296,922 318,931
Fair Value, Inputs, Level 2 [Member]
   
Disclosed at fair value:    
Financial Services debt (fair value) 115,098 138,795
Senior notes (fair value) 2,060,018 2,663,451
Fair Value, Inputs, Level 1 [Member]
   
Disclosed at fair value:    
Cash and equivalents (including restricted cash) (fair value) 1,419,415 1,476,710
House And Land Inventory Member | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
   
Measured at fair value on a non-recurring basis:    
Assets, Fair Value Disclosure, Nonrecurring 0 11,243
Interest Rate Lock Commitments [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
   
Measured at fair value on a recurring basis:    
Assets, Fair Value Disclosure, Recurring 12,122 6,021
Forward Contracts [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
   
Measured at fair value on a recurring basis:    
Assets, Fair Value Disclosure, Recurring (8,956) (646)
Whole Loan Commitments [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
   
Measured at fair value on a recurring basis:    
Assets, Fair Value Disclosure, Recurring (141) (55)
Residential Mortgage [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
   
Measured at fair value on a recurring basis:    
Assets, Fair Value Disclosure, Recurring $ 296,922 $ 318,931
[1] The recorded carrying value reflects the impact of various discounts and premiums that are amortized to interest cost over the respective terms of the senior notes.