Intangible Assets, Liabilities, and Deferred Leasing Costs - Summary of Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortization Income
2020	$ 7,572
2021	6,314
2022	4,839
2023	3,792
2024	3,095
Thereafter	17,030
Intangible liabilities, net	42,642	$ 46,985
In-place leases
Amortization Expense
2020	20,164
2021	16,923
2022	12,919
2023	10,952
2024	9,542
Thereafter	36,031
Total future amortization expense	106,531
Above-market leases
Amortization Expense
2020	2,124
2021	1,786
2022	1,265
2023	1,046
2024	824
Thereafter	2,784
Total future amortization expense	9,829
Deferred leasing costs
Amortization Expense
2020	3,212
2021	1,667
2022	1,493
2023	1,187
2024	820
Thereafter	2,531
Total future amortization expense	$ 10,910