Fair Value - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Level 2 [Member]	Sep. 30, 2013 Level 2 [Member] Fair Value, Measurements, Recurring [Member] Mortgage Banking [Member] Forward Sales Contracts [Member]	Sep. 30, 2013 Level 2 [Member] Fair Value, Measurements, Recurring [Member] Mortgage Banking [Member] Rate Lock Commitments [Member]	Sep. 30, 2013 Homebuilding [Member]	Dec. 31, 2012 Homebuilding [Member]	Sep. 30, 2013 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											$ 581,940
Senior Notes carrying value									599,053	598,988	599,053
Notional amount of contractual commitments							443,162	326,729
Average basis points of loan amount	0.78%
Fallout rate of measuring fair value of rate lock commitments	9.00%
Fair value of mortgage loans held for sale	153,928
Increase in fair value of loans held for sale	987
Aggregate principal balance of loans held for sale						152,941
Fair value adjustment to income or expense		$ (418)	$ (1,535)	$ 2,063	$ (1,456)