Lease Intangibles - Scheduled Amortization of Acquired Lease Intangible Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired Lease Intangibles [Abstract]
Net Increase In Lease Revenues, Total	$ 82,406	$ 94,467
Amortizable Intangible Assets, Net Carrying Amount	(116,820)	(115,939)
In-place lease intangible assets
Acquired Lease Intangibles [Abstract]
2020, Net Increase In Lease Revenues	7,177
2021, Net Increase In Lease Revenues	6,717
2022, Net Increase In Lease Revenues	6,196
2023, Net Increase In Lease Revenues	6,149
2024, Net Increase In Lease Revenues	5,706
Thereafter, Net Increase In Lease Revenues	46,494
Net Increase In Lease Revenues, Total	78,439
2020, Increase to Amortization	(27,827)
2021, Increase to Amortization	(21,053)
2022, Increase to Amortization	(15,160)
2023, Increase to Amortization	(11,578)
2024, Increase to Amortization	(8,931)
Thereafter, Increase to Amortization	(28,304)
Amortizable Intangible Assets, Net Carrying Amount	(112,853)	$ (110,049)
2020, Reduction of Rent Expense	58
2021, Reduction of Rent Expense	58
2022, Reduction of Rent Expense	58
2023, Reduction of Rent Expense	58
2024, Reduction of Rent Expense	58
Thereafter, Reduction of Rent Expense	230
Reduction of Rent Expense, Total	520
2020 Net (Expense) Income	(20,592)
2021 Net (Expense) Income	(14,278)
2022 Net (Expense) Income	(8,906)
2023 Net (Expense) Income	(5,371)
2024 Net (Expense) Income	(3,167)
Thereafter, Net (Expense) Income	18,420
Total, Net (Expense) Income	$ (33,894)