Variable Interest Entities - Total Risk of Loss Related to Contract Land Deposits (Detail) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Variable Interest Entity Reporting Entity Involvement Maximum Loss Exposure [Abstract]
Contract land deposits		$ 351,085	$ 350,750
Loss reserve on contract land deposits		(49,237)	(56,074)
Contract land deposits, net		301,848	294,676
Contingent obligations in the form of letters of credit		3,630	4,674
Contingent specific performance obligations	[1]	1,505	1,505
Total risk of loss		$ 306,983	$ 300,855

[1] As of both June 30, 2015 and December 31, 2014, the Company was committed to purchase 10 finished lots under specific performance obligations.