Intangibles - Future Aggregate Net Amortization of Acquired Lease Intangibles (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Net Decrease in Revenue
2019	$ (1,335)
2020	(2,719)
2021	(2,649)
2022	(2,183)
2023	(1,889)
Thereafter	(12,492)
Total	(23,267)
Net Increase in Expenses
2019	18,252
2020	34,328
2021	31,860
2022	27,944
2023	25,078
Thereafter	143,385
Total	$ 280,847