Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract liability, revenue recognized	$ 90,000
Cumulative-effect adjustment from adoption of ASU 2014-09, net of tax			$ 2,196
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment from adoption of ASU 2014-09, net of tax			2,196
Other Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract cost	20,100		19,500
Homebuilding [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Customer deposits	172,033	$ 167,486	150,033
Restricted cash and cash equivalents	22,130		19,438
Consolidated Joint Venture [Member] | Homebuilding [Member] | Other Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash and cash equivalents	$ 1,128		$ 1,069	$ 1,199	$ 1,214