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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Service Cost Rate |  | 1.30% | 1.30% | 1.50%
Defined Benefit Plan, Plan with Benefit Obligation in Excess of Plan Assets, Benefit Obligation (Deprecated 2018-01-31) |  | $ 225,388 | $ 171,185 |
Defined Benefit Plan, Service Cost |  | $ 3,592 | $ 3,215 | $ 4,525
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate |  | 1.40% | 2.10% |
Defined Benefit Plan, Plan Assets, Contributions by Employer Including Benefits Paid to Participants | $ 13,000 | $ 5,000 |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax |  | 42,000 |  |
Defined Benefit Plan, Plan Assets, Business Combination |  | 0 | $ 251 |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) |  | 2,558 | 3,018 |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | 4,740 | 9,975 |
Defined Benefit Plan, Benefit Obligation |  | 225,388 | 201,492 | $ 126,031
Defined Benefit Plan, Benefit Obligation, Business Combination |  | 2,071 | 79,211 |
Assets for Plan Benefits, Defined Benefit Plan |  | 0 | 377 |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation |  | 222,607 | 169,097 |
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets |  | $ 83,305 | $ 60,988 |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase |  | 1.70% | 0.90% |
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Cost Rate Cost |  | 2.50% | 2.50% | 3.00%
Defined Benefit Plan, Plan Assets, Amount |  | $ 83,305 | $ 91,672 | $ 82,852
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant |  | 408 | 415 |
Defined Benefit Plan, Plan Assets, Benefits Paid |  | (6,770) | (2,788) |
Defined Benefit Plan, Plan Assets, Payment for Settlement |  | (8,493) | 0 |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) |  | (810) | (2,051) |
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held |  | 1,424 | 2,556 |
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement |  | (1,181) | (541) |
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 |  | (19,640) | 255 |
Defined Benefit Plans, Plan Assets Level 3 Reconciliation, Currency Translation |  | (915) | (2,056) |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months |  | 43,446 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five |  | 5,474 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four |  | 5,003 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three |  | 4,890 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two |  | 4,357 |  |
Liability, Defined Benefit Plan, Noncurrent |  | (130,329) | (106,917) |
Defined Benefit Plan, Interest Cost |  | 4,077 | 3,476 | 3,670
Defined Benefit Plan, Expected Return (Loss) on Plan Assets |  | (2,337) | (2,949) | (2,467)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) |  | 0 | 0 | (181)
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant |  | 408 | 415 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) |  | 32,018 | (989) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid |  | (6,849) | (4,447) |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment |  | 6 | 0 |
Defined Benefit Plan, Benefit Obligation, Payment for Settlement |  | (8,493) | (756) |
Defined Benefit Plan, Amortization of Gain (Loss) |  | (404) | (54) | 473
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment |  | 0 | 0 | (3,811)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | (378) | $ 74 | $ (4)
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter |  | $ 29,946 |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase |  | 1.80% | 1.90% | 1.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets |  | 3.10% | 4.80% | 5.00%
Liability, Defined Benefit Plan, Current |  | $ (11,754) | $ (3,280) |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position |  | (142,083) | (109,820) |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) |  | (2,922) | (4,664) |
Defined Benefit Plan, Accumulated Benefit Obligation |  | 222,607 | 199,337 |
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year |  | 1,000 |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position |  | (142,083) | (109,820) |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets |  | 83,305 | 60,988 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 4,550 | 3,762 | $ 2,205
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 29,468 | 30,684 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 40,676 | 60,988 | $ 60,774
Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 13,161 |  |
Cash and Cash Equivalents [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 30,684 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 30,684 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Cash and Cash Equivalents [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 |  |
Mutual Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 13,161 | 0 |
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Mutual Fund [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 13,161 |  |
Short-term Investments [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 433 | 0 |
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 433 | 0 |
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Short-term Investments [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 |  |
U.S. Bonds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 29,035 | 0 |
U.S. Bonds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 29,035 | 0 |
U.S. Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
U.S. Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
U.S. Bonds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 |  |
Insurance Contracts, at Fair Value [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 40,676 | 60,988 |
Insurance Contracts, at Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Insurance Contracts, at Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 | 0 |
Insurance Contracts, at Fair Value [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 40,676 | $ 60,988 |
Insurance Contracts, at Fair Value [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount |  | 0 |  |
The US Plan [Member] |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position |  | 8,000 |  |
Interest income and other income, net [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | $ (1,000) |  |

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- Definition Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Cost Rate Cost + References No definition available. + Details
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- Definition Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Service Cost Rate + References No definition available. + Details
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- Definition Defined Benefit Plan, Plan Assets, Contributions by Employer Including Benefits Paid to Participants + References No definition available. + Details
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- Definition Defined Benefit Plans, Plan Assets Level 3 Reconciliation, Currency Translation + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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 (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + 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 (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit 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 (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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