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Lease Intangibles - Scheduled Amortization (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Acquired Lease Intangibles [Abstract] |  |
Amortizable Intangible Assets, Net Carrying Amount | $ (127,571) | $ (114,584)
In-place lease intangible assets |  |
Acquired Lease Intangibles [Abstract] |  |
2018, Net Increase In Lease Revenues | 10,005 |
2019, Net Increase In Lease Revenues | 9,642 |
2020, Net Increase In Lease Revenues | 8,655 |
2021, Net Increase In Lease Revenues | 7,503 |
2022, Net Increase In Lease Revenues | 7,185 |
Thereafter, Net Increase In Lease Revenues | 54,352 |
Net Increase In Lease Revenues, Total | 97,342 |
2018, Increase to Amortization | (29,005) |
2019, Increase to Amortization | (21,678) |
2020, Increase to Amortization | (16,797) |
2021, Increase to Amortization | (12,524) |
2022, Increase to Amortization | (8,778) |
Thereafter, Increase to Amortization | (32,290) |
Amortizable Intangible Assets, Net Carrying Amount | (121,072) | $ (108,593)
2018, Reduction of Rent Expense | 58 |
2019, Reduction of Rent Expense | 58 |
2020, Reduction of Rent Expense | 58 |
2021, Reduction of Rent Expense | 58 |
2022, Reduction of Rent Expense | 58 |
Thereafter, Reduction of Rent Expense | 347 |
Reduction of Rent Expense, Total | 637 |
2018, Net Income (Expense) | (18,942) |
2019, Net Income (Expense) | (11,978) |
2020, Net Income (Expense) | (8,084) |
2021, Net Income (Expense) | (4,963) |
2022, Net Income (Expense) | (1,535) |
Thereafter, Net Income (Expense) | 22,409 |
Total, Net Income (Expense) | $ (23,093) |

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