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Benefit Plans Benefit Plans (Detail 7) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Service Cost | $ 16,635 | $ 16,906 | $ 17,236
Defined Benefit Plan, Interest Cost | 12,938 | 12,955 | 15,168
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 37,934 | 37,086 | 40,949
Amortization of Actuarial (Gains) Losses and Plan Amendments | 18,756 | 20,129 | 15,962
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 7,963
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 10,395 | 12,904 | 15,380
Pension Plan [Member] | Domestic Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Service Cost | 1,090 | 565 | 432
Defined Benefit Plan, Interest Cost | 4,242 | 4,374 | 4,428
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 6,929 | 6,737 | 7,781
Amortization of Actuarial (Gains) Losses and Plan Amendments | 5,804 | 6,556 | 7,606
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 7,963
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 4,207 | 4,758 | 12,648
Pension Plan [Member] | Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Service Cost | 15,545 | 16,341 | 16,804
Defined Benefit Plan, Interest Cost | 8,630 | 8,511 | 10,664
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 31,005 | 30,349 | 33,168
Amortization of Actuarial (Gains) Losses and Plan Amendments | 14,575 | 16,247 | 12,923
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 7,745 | 10,750 | 7,223
Other Postretirement Benefits Plan [Member] | Domestic Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Service Cost | 0 | 0 | 0
Defined Benefit Plan, Interest Cost | 66 | 70 | 76
Amortization of Actuarial (Gains) Losses and Plan Amendments | (1,623) | (2,674) | (4,567)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ (1,557) | $ (2,604) | $ (4,491)

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- Definition Amortization of actuarial (gains) losses and plan amendments and prior service cost recorded to net periodic pension cost from other comprehensive income during the period, gross. + References No definition available. + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: 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=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 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)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for 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)(1) -URI http://asc.fasb.org/extlink&oid=108410482&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=112275985&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)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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