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Benefit Plans Benefit Plans (Detail 1) (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, Benefit Obligation | $ 996,483 | $ 1,063,722 | $ 979,417
Defined Benefit Plans, Service Cost and Other | 31,811 | 30,165 |
Defined Benefit Plan, Interest Cost | 12,938 | 12,955 | 15,168
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (50,655) | 40,033 |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | 966 | (15,016) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 44,439 | 38,395 |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | (17,860) | 54,563 |
Defined Benefit Plan, Plan Assets, Amount | 862,951 | 919,782 | 820,272
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | (42,521) | 63,924 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 26,334 | 23,458 |
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | 15,327 | 13,640 |
Defined Benefit Plan, Plan Assets, Benefits Paid | 44,439 | 38,395 |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | (11,532) | 36,883 |
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (133,532) | (143,940) |
Pension Plan [Member] | Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | 864,095 | 918,478 | 838,277
Defined Benefit Plans, Service Cost and Other | 30,721 | 29,600 |
Defined Benefit Plan, Interest Cost | 8,630 | 8,511 | 10,664
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (40,469) | 33,036 |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | 974 | (15,153) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 36,379 | 30,356 |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | (17,860) | 54,563 |
Defined Benefit Plan, Plan Assets, Amount | 767,410 | 808,215 | 716,169
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | (34,102) | 49,055 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 26,032 | 22,961 |
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | 15,176 | 13,503 |
Defined Benefit Plan, Plan Assets, Benefits Paid | 36,379 | 30,356 |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | (11,532) | 36,883 |
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (96,685) | (110,263) |
Pension Plan [Member] | Domestic Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | 130,202 | 142,571 | 138,155
Defined Benefit Plans, Service Cost and Other | 1,090 | 565 |
Defined Benefit Plan, Interest Cost | 4,242 | 4,374 | 4,428
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (10,019) | 6,979 |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | 0 | 0 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 7,682 | 7,502 |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | 0 | 0 |
Defined Benefit Plan, Plan Assets, Amount | 95,541 | 111,567 | 104,103
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | (8,419) | 14,869 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 75 | 97 |
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | 0 | 0 |
Defined Benefit Plan, Plan Assets, Benefits Paid | 7,682 | 7,502 |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | 0 | 0 |
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (34,661) | (31,004) |
Other Postretirement Benefits Plan [Member] | Domestic Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | 2,186 | 2,673 | 2,985
Defined Benefit Plans, Service Cost and Other | 0 | 0 |
Defined Benefit Plan, Interest Cost | 66 | 70 | 76
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (167) | 18 |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | (8) | 137 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 378 | 537 |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | 0 | 0 |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 | $ 0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | 0 | 0 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 227 | 400 |
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | 151 | 137 |
Defined Benefit Plan, Plan Assets, Benefits Paid | 378 | 537 |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | 0 | 0 |
Defined Benefit Plan, Funded (Unfunded) Status of Plan | $ (2,186) | $ (2,673) |

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- Definition The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period and other deminimus expenses. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. + References No definition available. + 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=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 + 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=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + 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)(6) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + 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/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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)(01) -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 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -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 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: 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 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of foreign currency translation gain (loss) which (increases) decreases 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 (a)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + 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 (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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