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Summary of Significant Accounting Policies - Future Amortization of Deferred Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Year Ending December 31,
2021	$ 40,723
2022	39,246
2023	38,167
2024	35,582
2025	33,450
Thereafter	250,724
Total	437,892
Total	(35,700)	$ (26,668)
Lease intangibles (in-place)
Year Ending December 31,
2021	21,930
2022	20,498
2023	19,497
2024	17,871
2025	16,220
Thereafter	89,481
Total	185,497
Lease intangibles (above-market)
Year Ending December 31,
2021	24,965
2022	24,018
2023	23,108
2024	21,440
2025	20,528
Thereafter	174,036
Total	288,095
Lease intangibles (below-market)
Year Ending December 31,
2021	(6,172)
2022	(5,270)
2023	(4,438)
2024	(3,729)
2025	(3,298)
Thereafter	(12,793)
Total	$ (35,700)

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