Variable Interest Entities - Total Risk of Loss Related to Contract Land Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]
Contract land deposits	$ 527,180	$ 439,833
Loss reserve on contract land deposits	(30,041)	(52,205)
Contract land deposits, net	497,139	387,628
Contingent obligations in the form of letters of credit	10,145	8,249
Total risk of loss	$ 507,284	$ 395,877