Related-Party Transactions (Detail)	1 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013	May 31, 2015 USD ($)	Apr. 30, 2015 a	Jul. 31, 2014 USD ($)	Apr. 30, 2014 USD ($)
Related Party Transaction [Line Items]
Area of coastal residential development (in acre) | a							195.5
Affiliates [Member]
Related Party Transaction [Line Items]
Real estate inventory acquisitions from affiliates		$ 0	$ 16,800,000	$ 40,500,000
Pacific Point Development Partners, LLC [Member]
Related Party Transaction [Line Items]
Initial capital investment in joint venture						$ 16,800,000
Non-recourse construction and development loan						$ 257,900,000
Marblehead Development Partners, LLC [Member]
Related Party Transaction [Line Items]
Initial capital investment in joint venture									$ 46,800,000
Marblehead Development Partners, LLC [Member] | Starwood Property Trust [Member]
Related Party Transaction [Line Items]
Initial capital investment in joint venture								$ 264,200,000
Tramonto Development Partners, LLC [Member]
Related Party Transaction [Line Items]
Initial capital investment in joint venture	$ 16,500,000			$ 16,500,000
Non-recourse construction and development loan	$ 54,500,000
J Units [Member] | Conversion Of TMM Holdings Class J Units Into TPG and Oaktree Units [Member]
Related Party Transaction [Line Items]
Common stock conversion ratio					1