Commitments and Contingent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Contract Lot	Dec. 31, 2013 Lot	Dec. 31, 2012
Commitments And Contingencies Disclosure [Abstract]
Rent expense under operating leases	$ 45,508	$ 39,608	$ 33,399
Maximum range of deposits required under the purchase agreements	10.00%
Term of business plan	5 years
Contingent forfeitable deposits with land developers	75,200
Number of specific performance contracts	1
Finished lots committed to purchase under specific performance obligations	10	13
Purchase price of finished lots committed to purchase under specific performance obligations	1,500
Contingent obligations under bonds or letters of credit arrangements	59,400
Contingent obligations under letters of credit arrangements	11,400
Warranty reserve provision including accrual charges		31,600
Warranty accrual related to a single completed community		15,600
Warranty accrual for a non-recurring service issue		$ 16,000