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Debt (Nonrecourse Debt) (Details) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2019 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2021 AUD ($) | May 22, 2019 USD ($) | May 22, 2019 AUD ($) | Dec. 09, 2011 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-Term Debt |  | $ 2,625,959,000 | $ 2,561,881,000 |  |  |  |  |
Gain (loss) on extinguishment of debt |  | 4,693,000 | $ 5,319,000 | $ (4,795,000) |  |  |  |
Long-term debt |  | $ 2,967,645,000 |  |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Derivative, fixed interest rate | 4.22% | 4.22% |  |  | 4.22% |  |  |
LIBOR |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument basis spread on variable rate | 200.00% |  |  |  |  |  |  |
Non Recourse Debt 2011 Revenue Bonds |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-Term Debt |  |  |  |  |  |  |  | $ 54,400,000
Nonrecourse |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  | $ 310,108,000 |  |  |  |  |  |
Nonrecourse | Ravenhall |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, maturity date |  | Mar. 31, 2042 |  |  |  |  |  |
Debt issuance costs, gross |  | $ 7,500,000 |  |  |  |  |  |
Nonrecourse | Ravenhall | Non Recourse Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 335,200,000 | $ 461.6 |
Stated interest rate |  | 4.23% |  |  | 4.23% |  |  |
Nonrecourse | Ravenhall | National Australia Bank Limited | Construction Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 574,500,000 |  |  | $ 791.0 |  |  |
Debt instrument basis spread on variable rate |  | 200.00% |  |  |  |  |  |
Notes Payable, Other Payables |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, maturity date | Sep. 01, 2034 |  |  |  |  |  |  |
Long-term debt | $ 44,300,000 |  |  |  |  |  |  |
Debt issuance costs, net |  | $ 600,000 |  |  |  |  |  |

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