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Benefit Plans Benefit Plans (Detail 11) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | $ 51,976 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two | 51,607 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three | 53,847 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four | 52,296 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 53,275 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter | $ 266,869 |  |
Pension Plan [Member] | Domestic Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 4.11% | 3.49% |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | $ 8,051 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two | 8,247 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three | 8,396 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four | 8,546 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 8,698 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter | $ 43,532 |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate | 3.49% | 3.97% | 4.27%
Pension Plan [Member] | Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 1.22% | 0.97% |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | $ 43,494 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two | 43,111 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three | 45,220 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four | 43,543 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 44,397 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter | $ 222,671 |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate | 0.97% | 0.98% | 1.31%
Other Postretirement Benefits Plan [Member] | Domestic Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 2.65% | 2.55% |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | $ 431 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two | 249 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three | 231 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four | 207 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 180 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter | $ 666 |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate | 3.15% | 3.41% | 3.54%
Healthcare Cost Trend Rate Maximum | 6.40% | 7.50% |
Healthcare Cost Trend Rate Minimum Percentage | 7.00% |  |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate | 4.50% |  |

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- Definition The maximum in a range of medical and prescription drug health care cost trend rates used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References No definition available. + Details
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- Definition The minimum in a range of medical and prescription drug health care cost trend rates used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References No definition available. + 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=108410482&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, 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)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement 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 (l) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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