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Segment Disclosures - Additional Information (Detail)
9 Months Ended
Sep. 30, 2014
Segment Reporting Information [Line Items]  
Senior notes interest rate 3.95%
Senior notes maturity Sep. 15, 2022
Senior Notes due 2022 [Member]
 
Segment Reporting Information [Line Items]  
Senior notes interest rate 3.95%
Senior notes maturity Sep. 15, 2022
Homebuilding [Member]
 
Segment Reporting Information [Line Items]  
Number of reportable segments 4
Mortgage Banking [Member]
 
Segment Reporting Information [Line Items]  
Number of reportable segments 1