Other Assets and Other Liabilities - Summary of Components of Accounts Payable, Accrued Expenses, and Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Subscriptions received in advance	$ 423,943	$ 166,542
Accounts payable and accrued expenses	66,559	53,247
Right of use lease liability - financing leases	60,308	4,300
Real estate taxes payable	48,538	56,555
Intangible liabilities, net	48,264	55,709
Right of use lease liability - operating leases	31,483
Prepaid rental income	26,897	29,112
Distribution payable	25,199	21,360
Accrued interest expense	25,112	24,432
Tenant security deposits	24,920	23,493
Other	36,764	29,648
Total	$ 817,987	$ 464,398