Loans Receivable - Summary of Trust's Loans Receivable (Parenthetical) (Detail) - Jacksonville, Florida [Member]	6 Months Ended
	Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
LIBOR floor, percentage	6.00%
Ceiling rate, percentage	8.00%
Whole Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LIBOR floor, percentage	6.00%