Intangible Assets, Liabilities, and Deferred Leasing Costs - Summary of Intangible Assets and Intangible Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
In-place leases	$ 158,002	$ 156,004
Above-market leases	16,625	22,353
Intangible assets	174,627	178,357
Accumulated amortization	(58,267)	(70,352)
Intangible assets, net	116,360	108,005
Accumulated amortization	69,161	74,312
Accumulated amortization	(26,519)	(27,327)
Intangible liabilities, net	42,642	46,985
Leasing costs	14,806	18,236
Accumulated amortization	(3,896)	(8,018)
Deferred leasing costs, net	10,910	10,218
In-place leases
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	(51,471)	(58,203)
Above-market leases
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (6,796)	$ (12,149)