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Summary of Significant Accounting Policies - Future Amortization of Deferred Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Year Ending December 31,
2020	$ 27,945
2021	27,096
2022	26,847
2023	25,786
2024	23,710
Thereafter	185,461
Total	316,845
Total	(26,668)	$ (27,218)
Lease Intangibles (In-place)
Year Ending December 31,
2020	13,351
2021	12,258
2022	11,392
2023	10,614
2024	9,502
Thereafter	52,814
Total	109,931
Lease Intangibles (Above-Market)
Year Ending December 31,
2020	19,462
2021	19,273
2022	18,980
2023	18,126
2024	16,473
Thereafter	141,268
Total	233,582
Lease Intangibles (Below-Market)
Year Ending December 31,
2020	(4,868)
2021	(4,435)
2022	(3,525)
2023	(2,954)
2024	(2,265)
Thereafter	(8,621)
Total	$ (26,668)

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