Land Under Development - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) parcel lot
Real Estate [Line Items]
Sale of land under development	$ 45,800
Number of raw parcels of land owned | parcel	2
Carrying value of raw parcels of land	$ 8,151
Aggregate additional funding commitments related to raw land property under joint development	2,700
Expected development credits that will offset the aggregate additional funding commitments related to raw land property development	800
Development Costs Transferred to Inventory	$ 16,500
Number Of Developed Lots Transferred To Inventory | parcel	1
Payments to Acquire Land	$ 7,200
Raw Land Parcel Purchased During Period
Real Estate [Line Items]
Number of finished lots expected to be developed from raw parcels of land | lot	80
Total Raw Land Parcel Owned
Real Estate [Line Items]
Number of finished lots expected to be developed from raw parcels of land | lot	100