Income Taxes - Deferred Income Taxes on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Other accrued expenses and contract land deposit reserve	$ 67,520	$ 52,726
Deferred compensation	4,608	4,635
Equity-based compensation expense	41,839	42,043
Inventory	13,118	10,530
Unrecognized tax benefit	11,705	12,355
Other	8,639	8,289
Total deferred tax assets	147,429	130,578
Less: Deferred tax liabilities	7,184	7,902
Net deferred tax asset	$ 140,245	$ 122,676