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Debt And Liquidity (2018 Term Loan Facility) (Details) - 2018 Term Loan Facility - USD ($) $ in Millions | 6 Months Ended |
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Jun. 30, 2022 | Feb. 28, 2021
Debt Instrument [Line Items] |  |
Equity Interest Pledge | 65.00% |
Debt Instrument, Annual Amortization Rate, Amount | $ 112.5 |
Repayment Of Excess Cashflow Percentage | 75.00% |
Ratio of Indebtedness to Net Capital | 4.00 |
Contingent Event One |  |
Debt Instrument [Line Items] |  |
Repayment Of Excess Cashflow Percentage | 50.00% |
Contingent Event Two |  |
Debt Instrument [Line Items] |  |
Repayment Of Excess Cashflow Percentage | 0.00% |
Minimum |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Variable Rate | 0.50% | 1.00%
Minimum | Contingent Event One |  |
Debt Instrument [Line Items] |  |
Ratio of Indebtedness to Net Capital | 1.25 |
Maximum | Contingent Event One |  |
Debt Instrument [Line Items] |  |
Ratio of Indebtedness to Net Capital | 1.75 |
Adjusted LIBO Rate |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 3.00% |
Debt Instrument, Basis Spread on Variable Rate, Increase (Decrease) | (0.50%) |
Debt Instrument, Basis Spread on Variable Rate, Decrease Upon Achievement Of Specific Credit Ratings | 0.25% |
ABR |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% |

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