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Fair Value - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Fair Value Measurement Gain/(Loss) $ 6,676    
Homebuilding [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Senior Notes carrying value 595,999   $ 595,847
Homebuilding [Member] | Senior Notes due 2022 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Senior Notes carrying value 595,999    
Homebuilding [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Senior Notes due 2022 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Senior Notes fair value 615,000    
Mortgage Banking [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value of mortgage loans held for sale 189,191   $ 319,553
Mortgage Banking [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value adjustment income (expense) (657) $ (422)  
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Rate Lock Commitments [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Notional amount of contractual commitments $ 409,435    
Average basis points of loan amount 1.07%    
Fallout rate of measuring fair value of rate lock commitments 13.00%    
Total Fair Value Measurement Gain/(Loss) $ 5,424    
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Forward Sales Contracts [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Notional amount of contractual commitments 525,038    
Total Fair Value Measurement Gain/(Loss) (1,984)    
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgages Held for Sale [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Notional amount of contractual commitments 185,955    
Fair value of mortgage loans held for sale 189,191    
Total Fair Value Measurement Gain/(Loss) $ 3,236