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Derivative Financial Instruments - Additional Information (Details) $ in Millions |  | 9 Months Ended
--- | --- | ---
May 22, 2019 USD ($) | Sep. 30, 2020 USD ($) Instrument
Ravenhall |  |
Derivative [Line Items] |  |
Gain (loss) on interest rate cash flow hedge ineffectiveness | $ 3.9 |
Interest Rate Swap |  |
Derivative [Line Items] |  |
Derivative, number of instruments held | Instrument |  | 2
Notional amount |  | $ 44.3
Derivative, fixed interest rate |  | 4.22%
Change in fair value of derivative instrument classified as cash flow hedge |  | $ 4.3
Value of swap liability |  | $ 7.3
Interest Rate Swap | Operating Phase of Asset | Ravenhall, Australia |  |
Derivative [Line Items] |  |
Derivative, fixed interest rate |  | 4.20%

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