Accounts Payable and Accrued Expenses and Other Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Accrued Liabilities Current [Line Items]
Lease liabilities	$ 27
Ground Leases [Member]
Accrued Liabilities Current [Line Items]
Lease liabilities		$ 27
Weighted average incremental borrowing rate	8.70%
Weighted average remaining maturity period	30 years