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Pensions and Other Postretirement Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | $ 9,400 |  |
Pension plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefit obligation | 230,790 | $ 245,800 | $ 227,211
Defined benefit plan, benefit obligation, period increase (decrease) | (15,000) | 18,600 |
Actuarial (gain)/loss | 7,163 | (13,309) |
Employer contributions | 2,431 | 3,219 |
Other postretirement benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefit obligation | 44,884 | 47,977 | $ 54,384
Defined benefit plan, benefit obligation, period increase (decrease) | (3,100) | (6,400) |
Actuarial (gain)/loss | 995 | 4,794 |
Employer contributions | $ 3,338 | $ 3,555 |
United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percent of consolidated pension plan assets | 44.00% |  |
Percent of consolidated pension plan obligations | 48.00% |  |
Accrued postretirement liability | $ 43,700 |  |
Switzerland | Pension plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefit obligation | 5,400 |  |
Canada |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accrued postretirement liability | $ 1,200 |  |

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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