Real Estate and Loans Receivable - Summary of Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Loans [Line Items]
Loans, Balance	$ 1,422,403	$ 970,761
Mortgage Loans [Member]
Loans [Line Items]
Loans, Balance	$ 757,581	$ 397,594
Loans, Weighted Average Interest Rate	9.50%	10.50%
Acquisition loans [Member]
Loans [Line Items]
Loans, Balance	$ 610,469	$ 525,136
Loans, Weighted Average Interest Rate	9.10%	9.30%
Working capital and other loans [Member]
Loans [Line Items]
Loans, Balance	$ 54,353	$ 48,031
Loans, Weighted Average Interest Rate	10.20%	10.40%