Supplemental Disclosure to Consolidated Statements of Cash Flows - Additional Information (Detail) - Deconsolidated $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Property One
Cash Flow Supplemental Disclosures [Line Items]
Non-cash decrease in investments in real estates	$ 45,650
Non-cash increase in investment in mortgages, loans and preferred equity interests	4,791
Non-cash decrease in indebtedness	47,888
Property Two
Cash Flow Supplemental Disclosures [Line Items]
Non-cash decrease in investments in real estates	15,848
Non-cash increase in investment in mortgages, loans and preferred equity interests	$ 18,000