Income Taxes - Deferred Income Taxes on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Other accrued expenses and contract land deposit reserve	$ 76,498	$ 77,781
Deferred compensation	7,075	7,280
Equity-based compensation expense	55,077	45,361
Inventory	13,514	12,722
Unrecognized tax benefit	23,954	24,740
Other	10,106	9,391
Total deferred tax assets	186,224	177,275
Less: deferred tax liabilities	5,414	6,489
Net deferred tax position	$ 180,810	$ 170,786