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Benefit Plans Amounts Recognized in Other Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | $ 44,576 |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax | (35,662) | $ (32,699) | $ (23,326)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | 112 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax | 93 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | (25,801) |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | (20,370) |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 7,192 |  |
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, after tax | 5,823 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | 24,891 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI, net of tax | (19,701) | $ (2,108) | $ 3,522
Defined Benefit Plan, Changes in OCI Arising During the Period | 50,970 |  |
Defined Benefit Plan, Changes in OCI Arising During the Period, net of tax | 40,909 |  |
Pension Plan [Member] | Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | 37,041 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | 112 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | (23,251) |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 7,117 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | 24,891 |  |
Defined Benefit Plan, Changes in OCI Arising During the Period | 45,910 |  |
Pension Plan [Member] | UNITED STATES |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | 7,605 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | 0 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | (2,578) |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 0 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | 0 |  |
Defined Benefit Plan, Changes in OCI Arising During the Period | 5,027 |  |
Other Postretirement Benefits Plan [Member] | UNITED STATES |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | (70) |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | 0 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | 28 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 75 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | 0 |  |
Defined Benefit Plan, Changes in OCI Arising During the Period | $ 33 |  |

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- Definition Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 (i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 + Details
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