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Pension, Savings, And Other Employee Benefits - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, expected contributions by employer remainder of year | $ 5.2 |
Savings Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Employer investment in qualified defined contribution plan | 100.00% |
Maximum percent of employee pre-tax contributions that may be matched by the Company (percent) | 6.00% |
Qualified Plan | Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Estimated social security benefits age | 65 years |
Nonqualified Plan | Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plan contribution |  | $ 5.2

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