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Mortgage Notes Payable, Net - Finnish Refinancing (Details) - Finland € in Millions, $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Feb. 06, 2019 USD ($) property | Feb. 06, 2019 EUR (€) property | Jun. 30, 2019 | Feb. 06, 2019 EUR (€)
Debt Instrument [Line Items] |  |  |  |
Collateral, number of leased offices and industrial properties | 5 | 5 |  |
Mortgages |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from refinancing | $ 84.2 | € 74.0 |  |
Debt bearing fixed interest rate | $ 67.4 |  |  | € 59.2
Percentage fixed interest rate | 80.00% |  | 80.00% | 80.00%
Interest rate spread | 1.80% | 1.80% |  |
Repayments of debt | $ 65.3 | € 57.4 |  |
Mortgages | Euribor |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 1.40% |  |  | 1.40%
Interest rate spread |  |  | 1.40% |

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