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Retirement And Other Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Retirement Benefits [Abstract] |  |  |
Employer contributions to defined contribution plan | $ 7,700 | $ 6,800 | $ 4,200
Deferred Compensation Arrangement with Individual, Postretirement Benefits |  |  |
Other long-term liabilities | 62,171 | 58,027 |
Accrued expenses and other current liabilities | $ 42,781 | 26,424 |
Deferred compensation, percentage of funds invested | 99.00% |  |
Deferred Compensation |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits |  |  |
Compensation deferred by participants | $ 900 | 6,900 | 4,900
Amount withdrawn from the Plan by participants | 1,700 | 200 | $ 200
Other long-term liabilities | 30,300 | 25,900 |
Accrued expenses and other current liabilities | 200 | 400 |
Life insurance contract assets | $ 30,100 | $ 22,200 |

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