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v3.20.2

Basis of Presentation and Recent Developments (Details) | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2020 USD ($) | Sep. 30, 2020 reporting_segment | Sep. 30, 2020 reportable_segment | Dec. 31, 2019 operating_segment | Sep. 30, 2019 | Mar. 23, 2016 USD ($)
Debt [Line Items] |  |  |  |  |  |
Number of operating segments | operating_segment |  |  |  | 4 |  |
Number of reportable segments |  | 2 | 3 |  |  |
6.50% Notes due 2024 | Senior Notes |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |
Debt Acquired | $ 29,744,000 |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 900,000,000
Interest rate, stated percentage |  |  |  |  | 6.50% | 6.50%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 73.90% |  |  |  |  |
Long-term Debt | $ 21,999,000 |  |  |  |  |
Long-term Debt, Accrued Interest | 946,000 |  |  |  |  |
Gain (Loss) on Extinguishment of Debt | $ 7,388,000 |  |  |  |  |

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