Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
2020 (nine months remaining)	$ 18,801
2021	17,854
2022	12,043
2023	9,213
2024	6,294
Thereafter	11,465
Intangible assets, net	75,670	$ 84,851
Liabilities
2020 (nine months remaining)	3,665
2021	3,838
2022	2,257
2023	1,716
2024	1,428
Thereafter	7,701
Acquired lease intangibles, net	$ 20,605	$ 22,263