Organization, Description of the Business and Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Additional paid-in capital Additional Paid-in Capital [Member] Interest rate swaps Interest Rate Swap [Member] Earnings in affiliated companies, net of tax Equity in earnings of affiliated companies, net of tax Equity in earnings of affiliated companies, net of tax Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Earnings (loss) per share: Earnings Per Share, Basic [Abstract] Summary of Significant Accounting Policies New Accounting Pronouncements, Policy [Policy Text Block] Financial Instruments and Fair Value Measurement Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Interest and other financial expense, net Interest and other financial expense, net Interest Income (Expense), Nonoperating China Term-Loan Secured Long-Term Debt, Noncurrent Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Basic (in USD per share) Basic Earnings (loss) per share (in USD per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Schedule of Other Short-Term Debt and Obligations Schedule of Line of Credit Facilities [Table Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Trade payables Increase (Decrease) in Accounts Payable, Trade Other short-term debt and obligations Total of Other Short-term Debt and Obligations Short-Term Debt Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Adjustment to Compensation, Amount Adjustment to Compensation Amount Schedule of Fair Value Measurements Not Recurring Fair Value Measurements, Nonrecurring [Table Text Block] Committed Committed [Member] Committed Share-based compensation Share-Based Payment Arrangement, Noncash Expense Ancillary Credit Facilities Revolving Credit Facility and Ancillary Credit Facilities Revolving Credit Facility, Ancillary Credit Facilities [Member] Revolving Credit Facility, Ancillary Credit Facilities Notional Amount Derivative Asset, Notional Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Total stockholders' equity Beginning balance Ending balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Long term incentive plan Share-Based Payment Arrangement, Expense Common stock, shares authorized (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Current portion of Term-Loan Long-Term Debt, Gross, Current Long-Term Debt, Gross, Current Current assets Assets, Current 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Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Revolving Credit Facility Revolving Credit Facility, Total Commitment [Member] Revolving Credit Facility, Total Commitment Treasury shares Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Total Debt, Long-Term and Short-Term, Combined Amount Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Gross amount of receivables sold Financing Receivable, Sale Entity Shell Company Entity Shell Company Other liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating segments Operating Segments [Member] OEC Huaibei outstanding borrowings Orion Engineered Carbons Huaibei [Member] Orion Engineered Carbons Huaibei Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Current portion of long-term debt and other financial liabilities Long-Term Debt, Current Maturities Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Deferred income tax liabilities Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Income tax liabilities Increase (Decrease) in Accrued Taxes Payable Award Timing Method Award Timing Method [Text Block] Award Type Award Type [Axis] Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Assets Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Issuance of stock under equity compensation plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Address, City or Town Entity Address, City or Town Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other segment items Segment Reporting, Other Segment Item, Amount Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Inventories Inventory Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Dividends per share (in USD per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Investment in equity method affiliates Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding PEO PEO [Member] Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Income (loss) before earnings in affiliated companies and income taxes Income (loss) before earnings in affiliated companies and income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Changes in operating assets and liabilities, net: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Guarantee obligation carrying amount Guarantor Obligations, Current Carrying Value Retained earnings Retained Earnings [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date OEC LLC outstanding borrowings Orion Engineered Carbons LLC [Member] Orion Engineered Carbons LLC Cash, cash equivalents and restricted cash at the beginning of the period Cash, cash equivalents and restricted cash at the end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Fair Value Derivative Asset Income tax expense Income Tax Expense (Benefit) Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, before Tax, Attributable to Parent Interest and other financial expense, net Interest Expense [Member] Income taxes payable Taxes Payable, Current Nonrecurring Fair Value, Nonrecurring [Member] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] 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flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Equity Components [Axis] Equity Components [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Other Performance Measure, Amount Other Performance Measure, Amount Currency translation AOCI Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Current portion of long-term debt and other financial liabilities Debt, Current Payments for debt issue costs Payments of Debt Issuance Costs Entity Address, State or Province Entity Address, State or Province Dividends Dividends, Common Stock Total current liabilities Liabilities, Current Decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Less restricted cash at the end of the period Restricted Cash Entity [Domain] Entity [Domain] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Document Fiscal Year Focus Document Fiscal Year Focus Right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of long-term debt Repayments of Long-Term Debt Effective income tax rates Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Notional Amount Reported Value Measurement [Member] Current Long-Term Debt, Current Maturities [Abstract] Equity [Abstract] Equity [Abstract] OEC GmbH outstanding borrowings Orion Engineered Carbons GmbH [Member] Orion Engineered Carbons GmbH Financial Information by Segment Segment Reporting Disclosure [Text Block] Loss on receivables Gain (Loss) on Sale of Accounts Receivable Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Selling, general and administrative expenses Selling, General and Administrative Expense Deferred income tax assets Deferred Income Tax Assets, Net Schedule of Changes in AOCI, Net of Tax Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Acquisition of property, plant and equipment Payments to Acquire Productive Assets Depreciation of property, plant and equipment and amortization of intangible assets and right of use assets Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment Depreciation, Depletion and Amortization Other assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Cross currency swaps Cross currency swaps Currency Swap [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current ASSETS Assets [Abstract] Long-term debt, net Long-term debt, net Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] Credit Facility [Domain] Credit Facility [Domain] Stockholders' equity Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] LTIP and other non-operating charges LTIP and other non-operating charges Long Term Incentive Plan And Other Non-operating Charges Long Term Incentive Plan And Other Non-operating Charges Entity Address, Address Line One Entity Address, Address Line One Repurchases of Common stock Treasury Stock, Value, Acquired, Cost Method AOCI related to cash flow hedges expected to be reclassified Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Research and development costs Research and Development Expense Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Expected credit losses Accounts Receivable, Allowance for Credit Loss, Current Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Proceeds from sale of emissions certificate Proceeds From Sale Of Emissions Certificate Proceeds From Sale Of Emissions Certificate Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Dilutive effect of share based payments (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Document Quarterly Report Document Quarterly Report Deferred taxes Deferred Income Taxes and Tax Credits Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Schedule of Debt and Other Obligations Schedule of Debt [Table Text Block] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Issuance of stock under equity compensation plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Name Trading Arrangement, Individual Name All Award Types Award Type [Domain] Gain (Loss) Recognized in AOCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] China Working Capital Loans (capacity $17.6 million) CHINA MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Stock based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Income tax effects before reclassifications Other Comprehensive Income (Loss) before Reclassifications, Tax Segments [Domain] Segments [Domain] Adjusted EBITDA Adjusted Earnings Before Interest, Tax, Depreciation And Amortization Adjusted Earnings Before Interest, Tax, Depreciation And Amortization Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Total non-current assets Assets, Noncurrent Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Outstanding Line of Credit, Current Inventories Increase (Decrease) in Inventories Inventories, net Inventories, net Inventory, Net Assets Derivative Asset [Abstract] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Debt and Other Obligations Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Finished goods, net Inventory, Finished Goods, Net of Reserves Common stock Common Stock, Value, Issued Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Diluted (in shares) Weighted average number of diluted Common stock (in shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and contingencies Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Document Transition Report Document Transition Report Number of emission allowance certificates sold Number Of Emission Allowance Certificates Sold Number Of Emission Allowance Certificates Sold Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income Taxes Income Tax Disclosure [Text Block] Rubber Rubber [Member] Rubber [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Hedging Designation [Axis] Hedging Designation [Axis] Schedule of Derivatives Instruments Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Term-Loan Debt Instrument, Fair Value Disclosure Document Type Document Type Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Gain (Loss) Reclassified from AOCI to Income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Derivative Contract [Domain] Derivative Contract [Domain] Net sales Net sales from external customers Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Term-Loan Term Loan Facility [Member] Term Loan Facility [Member] Name Forgone Recovery, Individual Name Total current assets Assets, Current Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Term-Loan Long-term Debt, Excluding Current Maturities, Gross Long-term Debt, Excluding Current Maturities, Gross Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Current liabilities Liabilities, Current [Abstract] Other comprehensive income Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Geographical [Axis] Geographical [Axis] Other assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Defined benefit plans, net Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Foreign currency transactions Gain (Loss), Foreign Currency Transaction, before Tax Diluted (in USD per share) Diluted Earnings (loss) per share (in USD per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivable, net Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Title of 12(b) Security Title of 12(b) Security AOCI Attributable to Parent, Net of Tax AOCI Attributable to Parent, Net of Tax [Roll Forward] Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Treasury stock, cost (in shares) Treasury Stock, Common, Shares Weighted-average shares outstanding (in thousands): Earnings Per Share [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Counterparty Two Counterparty Two [Member] Counterparty Two Gross profit Gross Profit Repurchases of Common stock (in shares) Treasury Stock, Shares, Acquired Award Timing Disclosures [Line Items] Term Loan Term Loan [Member] Term Loan [Member] Schedule of Inventories, Net of Reserves Schedule of Inventory, Current [Table Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Accumulated Other Comprehensive Income (Loss) Equity [Text Block] Uncommitted Uncommitted [Member] Uncommitted Repurchase Agreement Securities Sold under Agreements to Repurchase Korea Working Capital Loans (capacity $47.5 million) KOREA, REPUBLIC OF Net income (loss) Net income (loss) Net income Net income (loss) attributable to ordinary equity holders Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Schedule of Effective Income Tax Rates Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Repurchase of Common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Trade receivables Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Receivables [Abstract] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Income from operations Operating Income (Loss) Retained earnings Retained Earnings (Accumulated Deficit) Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Other expenses, net Other Operating Income (Expense), Net Current Fiscal Year End Date Current Fiscal Year End Date Hedging Activities Adjustments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Specialty Specialties [Member] Specialties [Member] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Other non-operating Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Accrued interest Securities Sold under Agreements to Repurchase Including Interest Securities Sold under Agreements to Repurchase Including Interest All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Treasury stock, at cost, 4,603,610 and 4,837,465 Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Deferred debt issuance costs - Term-Loan Debt Issuance Costs, Noncurrent, Net Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Non-current Long-Term Debt, Excluding Current Maturities [Abstract] Raw materials, consumables and supplies, net Inventory, Raw Materials, Net of Reserves Basic (in shares) Weighted average number of Common stock (in shares) Weighted Average Number of Shares Outstanding, Basic Cost of sales Cost of Product and Service Sold Schedule of Basic and Diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs 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Payments of Dividends Trading Arrangement: Trading Arrangement [Axis] Emissions certificates, repurchase obligation amount Emissions Certificates, Repurchase Obligation Amount Emissions Certificates, Repurchase Obligation Amount Total Shareholder Return Amount Total Shareholder Return Amount Insider Trading Arrangements [Line Items] Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Cash inflows related to current financial liabilities Cash Inflows Related To Current Financial Liabilities, Financing Activities Cash Inflows Related To Current Financial Liabilities, Financing Activities Total non-current liabilities Liabilities, Noncurrent Borrowing capacity Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Other current liabilities Other Liabilities, Current Employee benefit plan obligation Liability, Defined Benefit Plan, Noncurrent Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents at the end of the period Cash and Cash Equivalent China Term-Loan Bank Of China, Term Loan [Member] Bank Of China, Term Loan Counterparty Name [Axis] Counterparty Name [Axis] Common stock Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code China Working Capital Loans (capacity $17.6 million) China Working Capital Loans [Member] China Working Capital Loans Non-NEOs Non-NEOs [Member]