Homebuilding Accrued Liabilities and Financial Services Accounts Payable and Accrued Liabilities - Schedule of Financial Services Accounts Payable and Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Payables And Accruals [Abstract]
Insurance reserves	$ 47,834	$ 48,949	$ 47,852	$ 45,644	$ 44,724	$ 49,376
Accounts payable and other accrued liabilities	5,964		4,012
Total accounts payable and accrued liabilities	$ 53,798		$ 51,864