Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
Commitments And Contingencies [Line Items]
Rent expense under operating leases		$ 52,900
Maximum range of deposits required under the purchase agreements	10.00%
Contingent forfeitable deposits with land developers	$ 215,000
Aggregate additional funding commitments related to raw land property development	5,100
Expected development credit offset amount	2,600
Contingent obligations under bonds or letters of credit arrangements	40,600
Credit Agreement
Commitments And Contingencies [Line Items]
Contingent obligations under letters of credit arrangements	$ 12,800