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Retirement and Other Postretirement Benefit Plans - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Defined Benefit Retirement Plans | U.S. |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Employer contribution to defined benefit retirement plans | $ 0 |  | $ 100,000 |  | $ 200,000
Expected employer contribution in full current year | 1,100,000 |  | 1,100,000 |  |
Net amortization gain deferral | $ (100,000) |  | $ (300,000) | $ (200,000) |
Defined Benefit Plan, Tax Status [Extensible List] | us-gaap:NonqualifiedPlanMember | us-gaap:NonqualifiedPlanMember | us-gaap:NonqualifiedPlanMember | us-gaap:NonqualifiedPlanMember | us-gaap:NonqualifiedPlanMember
Defined Benefit Retirement Plans | European |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Employer contribution to defined benefit retirement plans | $ 900,000 | $ 1,200,000 | $ 2,800,000 | $ 4,900,000 | $ 6,000,000
Expected employer contribution in full current year | 4,600,000 |  | 4,600,000 |  |
Net amortization gain deferral |  | (200,000) | (200,000) | $ (500,000) |
Postretirement Health Care and Life Insurance Benefit Plans |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Employer contribution to defined benefit retirement plans | 100,000 | $ 100,000 |  |  | $ 200,000
Expected employer contribution in full current year | 500,000 |  | 500,000 |  |
Net amortization gain deferral | $ 300,000 |  | $ 900,000 |  |

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(ii) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=82843861&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 (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 + Details
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- Definition Indicates tax status of defined benefit plan designed to provide retirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2410-114920 + Details
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