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Summary of Significant Accounting Policies - Future Amortization of Deferred Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Year Ending December 31,
2019	$ 12,088
2020	24,016
2021	23,105
2022	22,858
2023	21,895
Thereafter	178,989
Total	282,951
Total	(27,908)	$ (27,218)
Deferred Financing Costs
Year Ending December 31,
2019	271
2020	542
2021	28
2022	0
2023	0
Thereafter	0
Total	841
Leasing Costs
Year Ending December 31,
2019	161
2020	402
2021	383
2022	371
2023	313
Thereafter	1,085
Total	2,715
Lease Intangibles (In-place)
Year Ending December 31,
2019	5,303
2020	10,077
2021	9,566
2022	8,753
2023	8,077
Thereafter	47,936
Total	89,712
Lease Intangibles (Above-Market)
Year Ending December 31,
2019	8,685
2020	17,580
2021	17,391
2022	17,098
2023	16,298
Thereafter	140,539
Total	217,591
Lease Intangibles (Below-Market)
Year Ending December 31,
2019	(2,332)
2020	(4,585)
2021	(4,263)
2022	(3,364)
2023	(2,793)
Thereafter	(10,571)
Total	$ (27,908)

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