Real Estate Investments, Net (Summary of Intangible Assets and Liabilities Future Amortization Expense) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Amortization Expense
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2019	$ 13,529
Finite-lived intangible assets, amortization expense, 2020	11,064
Finite-lived intangible assets, amortization expense, 2021	9,058
Finite-lived intangible assets, amortization expense, 2022	7,184
Finite-lived intangible assets, amortization expense, 2023	6,398
Rental Income
Finite-Lived Intangible Assets [Line Items]
Below market leases, amortization income, 2019	193
Below market leases, amortization income, 2020	336
Below market leases, amortization income, 2021	563
Below market leases, amortization income, 2022	788
Below market leases, amortization income, 2023	695
In-place lease assets | Amortization Expense
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2019	13,115
Finite-lived intangible assets, amortization expense, 2020	10,650
Finite-lived intangible assets, amortization expense, 2021	8,644
Finite-lived intangible assets, amortization expense, 2022	6,770
Finite-lived intangible assets, amortization expense, 2023	6,009
Other intangible assets | Amortization Expense
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2019	414
Finite-lived intangible assets, amortization expense, 2020	414
Finite-lived intangible assets, amortization expense, 2021	414
Finite-lived intangible assets, amortization expense, 2022	414
Finite-lived intangible assets, amortization expense, 2023	389
Above-market lease assets | Rental Income
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2019	(1,295)
Finite-lived intangible assets, amortization expense, 2020	(933)
Finite-lived intangible assets, amortization expense, 2021	(645)
Finite-lived intangible assets, amortization expense, 2022	(307)
Finite-lived intangible assets, amortization expense, 2023	(260)
Below-market lease liabilities | Rental Income
Finite-Lived Intangible Assets [Line Items]
Below market leases, amortization income, 2019	1,488
Below market leases, amortization income, 2020	1,269
Below market leases, amortization income, 2021	1,208
Below market leases, amortization income, 2022	1,095
Below market leases, amortization income, 2023	$ 955