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Benefit Plans Benefit Plans (Detail 4) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Net actuarial losses (gains) | $ 62,095 |  |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax | 47,788 | $ 30,759 | $ 106,837
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Plan Amendments and Prior Service Costs arising during the period, net of tax | 0 | (9,189) | (1,607)
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | (31,693) |  |
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax | 22,414 |  |
Amortization of Prior service costs in Net Periodic Benefits Costs, before tax | 7,768 |  |
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, after tax | (5,684) |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | (7,472) |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI, net of tax | (5,885) | $ (5,835) | $ (8,089)
Defined Benefit Plan, Changes in OCI Arising During the Period | 30,698 |  |
Defined Benefit Plan, Changes in OCI Arising During the Period, net of tax | 25,173 |  |
United States Pension Plans of US Entity, Defined Benefit [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Net actuarial losses (gains) | 1,750 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | (15,569) |  |
Amortization of Prior service costs in Net Periodic Benefits Costs, 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 | (13,819) |  |
Foreign Pension Plans, Defined Benefit [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Net actuarial losses (gains) | 60,026 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | (17,999) |  |
Amortization of Prior service costs in Net Periodic Benefits Costs, before tax | 5,076 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | (7,472) |  |
Defined Benefit Plan, Changes in OCI Arising During the Period | 39,631 |  |
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Net actuarial losses (gains) | 319 |  |
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses | 1,875 |  |
Amortization of Prior service costs in Net Periodic Benefits Costs, before tax | 2,692 |  |
Defined Benefit Plans, Impact of FX on Current Year Change in OCI | 0 |  |
Defined Benefit Plan, Changes in OCI Arising During the Period | $ 4,886 |  |

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- Definition Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Amount before tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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