Related-Party Transactions - Fees and Reimbursements Paid or Accrued by Winthrop and Liquidating Trust (Detail) - Winthrop Management [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Fees and reimbursements paid by the Trust	$ 5,211	$ 7,471
Base Asset Management Fee [Member]
Related Party Transaction [Line Items]
Fees and reimbursements paid by the Trust	4,575	6,367
Property Management Fee [Member]
Related Party Transaction [Line Items]
Fees and reimbursements paid by the Trust	633	974
Construction Management Fee [Member]
Related Party Transaction [Line Items]
Fees and reimbursements paid by the Trust	$ 3	$ 130