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Employee Benefit Plans (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2030
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Company contributions | $ 3,821,000 | $ 6,825,000 | $ 4,750,000 |
Defined Benefit Pension Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Weighted average discount rate used to determine net periodic benefit cost | 2.55% | 3.28% | 4.27% |
Rate of compensation increase to determine the net periodic benefit cost | 4.00% | 4.00% | 4.00% |
Expected long-term rate of return on plan assets | 7.00% | 7.00% | 7.00% |
Weighted average discount rates used to determine actuarial present value of the projected benefit obligation | 2.86% | 2.55% | 3.28% |
Company contributions | $ 3,821,000 | $ 6,825,000 |  |
Defined Benefit Pension Plan [Member] | U.S. Employees [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution plans, employer contribution plans, employer contribution percentage, maximum | 3.00% |  |  |
Defined contribution plans, employer contribution percentage, for new hires, minimum | 3.00% |  |  |
Defined contribution plans, employer contribution percentage, for new hires, maximum | 8.00% |  |  |
Defined Contribution Plan Employer Contribution Percentage Vested After Three Years | 100.00% |  |  |
Incurred expenses | $ 14,800,000 | 14,400,000 | $ 10,800,000 |
Defined Benefit Pension Plan [Member] | Non-U.S. Employees [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution plan employer contribution percentage for branch offices, minimum | 5.00% |  |  |
Defined contribution plan employer contribution percentage for branch offices, maximum | 78.30% |  |  |
Incurred expenses | $ 3,400,000 | 3,000,000.0 | $ 2,200,000 |
Defined Benefit Pension Plan [Member] | Equity Securities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Plan assets consist of shares in investment trusts, percentage | 76.00% |  |  |
Defined Benefit Pension Plan [Member] | Fixed Maturities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Plan assets consist of shares in investment trusts, percentage | 22.00% |  |  |
Defined Benefit Pension Plan [Member] | Limited Partnerships [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Plan assets consist of shares in investment trusts, percentage | 1.00% |  |  |
Defined Benefit Pension Plan [Member] | Cash [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Plan assets consist of shares in investment trusts, percentage | 1.00% |  |  |
Defined Benefit Pension Plan [Member] | Equity Funds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target asset allocation percentage | 70.00% |  |  |
Defined Benefit Pension Plan [Member] | Bonds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target asset allocation percentage | 30.00% |  |  |
Defined Benefit Pension Plan [Member] | Qualified Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Private equity limited partnerships | $ 2,600,000 | 4,600,000 |  |
Company contributions | $ 0 | $ 0 |  |
Post-Retirement Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Weighted average discount rate used to determine net periodic benefit cost | 2.55% | 3.28% | 4.27% |
Weighted average discount rates used to determine actuarial present value of the projected benefit obligation | 2.86% | 2.55% | 3.28% |
Company contributions | $ 267,000 | $ 232,000 |  |
Healthcare inflation rate | 6.50% |  |  |
Incurred expenses | $ 1,200,000 | $ 1,300,000 | $ 1,200,000 |
Post-Retirement Plan [Member] | Scenario Forecast [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Healthcare inflation rate |  |  |  | 4.75%

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