Intangible Assets and Other Noncurrent Assets, Net [Abstract] Intangible Assets and Other Noncurrent Assets, Net [Abstract] Summary of Intangibles and Other Assets Intangibles and Other Assets [Table Text Block] Intangibles and Other Assets [Table Text Block] Debt Disclosure [Abstract] Short-Term Borrowings, Long-Term Debt, and Interest Expense Debt Disclosure [Text Block] Revenue Recognition [Abstract] Revenue Recognition, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Other Current Assets Other Current Assets [Text Block] Retirement Benefits [Abstract] Pension Plans and Postretirement Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Accounting Policies [Abstract] Summary of Significant Accounting Policies Basis of Accounting, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Retained Earnings (Deficit) Retained Earnings [Member] Paid-in Capital / Treasury Stock Additional Paid-in Capital And Treasury Stock [Member] Additional Paid-in Capital And Treasury Stock Accumulated Other Comprehensive Income/(Loss) AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Outstanding Beginning balance Stockholders' Equity Attributable to Parent Net income Net Income (Loss) Attributable to Parent Other comprehensive income, (net of tax $243 for 2018 and $241 for 2017) (a) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Effects of U.S. enacted Tax Cuts and Jobs Act (a) Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect Effects of adoption of ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory Deferred Tax Liability, Intra-entity Transfer, Asset Other than Inventory Proceeds from stock award exercises and issuances (in shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Proceeds from stock award exercises and issuances Stock Issued During Period, Value, Share-based Compensation, Gross Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Excess tax deficiency from exercise of stock options Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation Restricted stock forfeitures (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Restricted stock forfeitures Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Dividends declared Dividends, Cash Ending balance (in shares) Ending balance Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net of allowance for doubtful accounts ($562 and $445) Accounts Receivable, Net, Current Inventories Inventory, Net Other current assets Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Intangibles and other assets, net Intangible and Other Assets, Noncurrent Intangible and Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of capital leases Capital Lease Obligations, Current Accounts payable, trade and other Accounts Payable, Current Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Long-term debt and capital leases Long-term Debt and Capital Lease Obligations Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (note 15) Commitments and Contingencies Common stock, par value $.001 per share; authorized 100,000,000; issued 22,959,663 and 22,884,588; outstanding 19,606,100 and 19,537,872 shares Common Stock, Value, Issued Paid-in capital Additional Paid in Capital, Common Stock Common stock held in treasury, at cost (3,353,563 and 3,346,716 shares) Treasury Stock, Value Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Basis of Statement Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock options Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Income Tax Disclosure [Abstract] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Nature of Uncertainty [Axis] Nature of Uncertainty [Axis] Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain] Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Decrease in effective tax rate due to excess tax benefit from share based compensation Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unrecognized Tax Benefits, Period Increase (Decrease) Unrecognized Tax Benefits, Period Increase (Decrease) Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Increase in effective tax rate due to last year and prior year tax return true-ups Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Estimate of decrease in unrecognized tax benefits Decrease in Unrecognized Tax Benefits is Reasonably Possible Income taxes paid Income Taxes Paid, Net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Effective Income Tax Rate Reconciliation, Tax Settlement, Percent Equity [Abstract] Changes in Accumulated Other Comprehensive Income (Loss) by Component Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Fair Value adjustment to inventory Fair Value Adjustment to Inventory [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Novel Novel Ingredients [Member] Novel Ingredients Nutragenesis [Member] Nutragenesis [Member] Nutragenesis [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Accounts receivable, net of allowances of $511 and $0 for Novel Ingredients and NutraGenesis, respectively Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Inventory, including fair value adjustment of $4,300 for Novel Ingredients Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Other non-current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accrued expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Expenses Deferred income taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Customer Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Customer Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Customer Deposits Total Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Allowances Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables, Allowance for Doubtful Accounts Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables, Allowance for Doubtful Accounts Net income Cash payment to acquire business Payments to Acquire Businesses, Gross Other Liabilities Disclosure [Abstract] Other Long-Term Liabilities Other Liabilities Disclosure [Text Block] Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee Severance and Benefits Employee Severance and Benefits [Member] Employee Severance and Benefits [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring reserve, beginning balance Restructuring Reserve Expense recorded Restructuring Charges Payments made Payments for Restructuring Restructuring reserve, ending balance Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Pension benefits Pension Plan [Member] Other benefits Other Postretirement Benefits Plan [Member] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] United States UNITED STATES CANADA CANADA Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Minimum contribution requirements Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year Employer contribution to contribution plan Defined Contribution Plan, Cost Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Food, Health and Nutrition Food, Health and Nutrition [Member] Food, Health and Nutrition [Member] Industrial Specialties Industrial Specialties [Member] Industrial Specialties [Member] Other Other Segments [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Sales Revenues EBITDA Earnings Before Interest, Taxes, Depreciation and Amortization Earnings Before Interest, Taxes, Depreciation and Amortization Depreciation and amortization Depreciation, Depletion and Amortization, Excluding Amortization of Financing Costs Depreciation, Depletion and Amortization, Excluding Amortization of Financing Costs Provision for income taxes Income Tax Expense (Benefit) Interest expense, net Interest and Debt Expense Statement of Comprehensive Income [Abstract] Tax amounts related to changes in interest rate swaps Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent Tax amounts related to changes in pension and post-retirement plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent Debt Instruments [Abstract] Debt Instruments [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Letter of Credit Letter of Credit [Member] Bridge Loan Bridge Loan [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Interest expense Interest Expense, Debt Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility, additional borrowing capacity Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Line of credit facility, maximum borrowing capacity including higher borrowing capacity option Line of Credit Facility, Maximum Borrowing Capacity Including Higher Borrowing Capacity Option Line of Credit Facility, Maximum Borrowing Capacity Including Higher Borrowing Capacity Option Amount outstanding under line of credit Long-term Line of Credit Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Letters of credit outstanding Letters of Credit Outstanding, Amount Weighted average interest rate Debt, Weighted Average Interest Rate Total leverage ratio Debt Instrument, Covenant Terms, Maximum Total Leverage Ratio Debt Instrument, Covenant Terms, Maximum Total Leverage Ratio Interest coverage ratio Debt Instrument, Covenant Terms, Minimum Interest Coverage Ratio Debt Instrument, Covenant Terms, Minimum Interest Coverage Ratio Outstanding borrowings as floating rate debt Long-term Debt, Percentage Bearing Variable Interest, Amount Effect of one percentage point increase to interest expense Long-term Debt, Percentage Bearing Variable Interest, Effect of One-Percentage Point Change in Interest Rate on Interest Expense Long-term Debt, Percentage Bearing Variable Interest, Effect of One-Percentage Point Change in Interest Rate on Interest Expense Interest paid Interest Paid, Including Capitalized Interest, Operating and Investing Activities Deferred financing cost Amortization of Debt Issuance Costs Investment Income, Interest Investment Income, Interest Interest Costs Capitalized Adjustment Interest Costs Capitalized Adjustment Other Current Liabilities Inventory Disclosure [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Finished products Inventory, Finished Goods, Net of Reserves Spare parts Inventory, Parts and Components, Net of Reserves Inventories Inventory reserves Inventory Valuation Reserves Schedule of Restructuring Initiatives for Severance and Benefits Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule Intangible Assets Acquired Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Business Acquisition Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Inventories Inventory Disclosure [Text Block] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares held Treasury Stock, Shares Segment Reporting Segment Reporting Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash flows provided by operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Amortization of deferred financing charges Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit) Gain on sale of building Gain (Loss) on Disposition of Property Plant Equipment Share-based compensation Share-based Compensation Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase in accounts receivable Increase (Decrease) in Accounts Receivable (Increase) decrease in inventories Increase (Decrease) in Inventories Increase in other current assets Increase (Decrease) in Other Current Assets Decrease in accounts payable Increase (Decrease) in Accounts Payable Decrease in other current liabilities Increase (Decrease) in Other Current Liabilities Changes in other long-term assets and liabilities Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows used for investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Proceeds from sale of building Proceeds from Sale of Buildings Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities Cash flows provided by (used for) financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Long-term debt borrowings Proceeds from Issuance of Long-term Debt Long-term debt repayments Repayments of Long-term Debt Restricted stock forfeitures Payments Related to Tax Withholding for Share-based Compensation Dividends paid Payments of Ordinary Dividends, Common Stock Net cash provided by (used for) financing activities Net Cash Provided by (Used in) Financing Activities Effect of foreign exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net change in cash Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Short-Term Borrowings and Long-Term Debt Schedule of Debt [Table Text Block] Components of Interest Expense, Net Interest Income and Interest Expense Disclosure [Table Text Block] Earnings Per Share [Abstract] Less: earnings attributable to unvested shares Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Net income available to participating common shareholders Net Income (Loss) Available to Common Stockholders, Basic Weighted average number of participating common and potential common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Basic number of participating common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive effect of stock equivalents (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted number of weighted average participating common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Earnings per participating common share: Earnings Per Share Reconciliation [Abstract] Earnings per participating common share - Basic (in dollars per share) Earnings Per Share, Basic Earnings per participating common share - Diluted (in dollars per share) Earnings Per Share, Diluted Total outstanding options, performance share awards and unvested restricted stock not included in the calculation of diluted earnings per share as the effect would be anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Revenue from Contract with Customer [Abstract] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Specialty Ingredients [Member] Specialty Ingredients [Member] Specialty Ingredients [Member] Core Ingredients [Member] Core Ingredients [Member] Core Ingredients [Member] Co-Products And Other [Member] Co-Products And Other [Member] Co-Products And Other [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] MEXICO MEXICO Other Foreign Countries [Member] Other Foreign Countries [Member] Other Foreign Countries Net sales Stockholders' Equity / Share-Based Compensation Shareholders' Equity and Share-based Payments [Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Pension and Other Postretirement Adjustments Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Changes in Fair Value of Effective Cash Flow Hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Other comprehensive loss before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Amounts reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Other comprehensive income (loss), net of tax Dividends Stockholders' Equity Note Disclosure [Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Segments [Domain] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Assets Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Minimum Minimum [Member] Maximum Maximum [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Restricted stock Restricted Stock [Member] Performance shares Performance Shares [Member] Stock Compensation Plan [Member] Stock Compensation Plan [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling, General and Administrative Expenses Selling, General and Administrative Expenses [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Total share-based compensation expense (benefit) Allocated Share-based Compensation Expense Intangibles and Other Assets, net Intangibles and Other Assets [Text Block] Intangibles and Other Assets [Text Block] Entire footnote disclosure of intangibles and other long-term assets. Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Other comprehensive income (loss), tax Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer relationships Customer Relationships [Member] Novel Ingredients And NutraGenesis [Member] Novel Ingredients And NutraGenesis [Member] Novel Ingredients And NutraGenesis [Member] Deferred Tax Assets, Operating Loss Carryforwards Deferred Tax Assets, Operating Loss Carryforwards Business Combination, Consideration Transferred Business Combination, Consideration Transferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Acquisition, Goodwill, Expected Tax Deductible Amount Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Developed technology and application patents Developed Technology and Application Patents [Member] Developed Technology and Application Patents [Member] Trade names and license agreements Trade Names and License Agreements [Member] Trade Names and License Agreements [Member] Non-compete agreements Noncompete Agreements [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Useful life Finite-Lived Intangible Asset, Useful Life Total intangibles, net Finite-Lived Intangible Assets, Net Deferred income taxes Deferred Income Tax Assets, Net Deferred financing costs, net of accumulated amortization of $4,117 for 2018 and $3,902 for 2017 (see note 12) Debt Issuance Costs, Line of Credit Arrangements, Net Other assets Other Assets, Miscellaneous, Noncurrent Total other assets, net Other Assets, Noncurrent Intangibles and other assets, net Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization of debt issuance costs Accumulated Amortization of Debt Issuance Costs, Line of Credit Arrangements Goodwill and Intangible Assets Disclosure [Abstract] Goodwill Goodwill Disclosure [Text Block] Summary of Components of Stock-Based Compensation Expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Environmental Remediation Site [Axis] Environmental Remediation Site [Axis] Environmental Remediation Site [Domain] Environmental Remediation Site [Domain] Nashville, TN Nashville, TN [Member] Nashville, TN [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Status [Domain] Litigation Case [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accrual for environmental loss contingencies Accrual for Environmental Loss Contingencies Environmental liabilities Accrued Environmental Loss Contingencies, Noncurrent Revolver borrowings under the credit facility due 2021 Long-term Debt Capital leases Capital Lease Obligations Total borrowings Long-term Debt and Capital Lease Obligations, Including Current Maturities Less current portion of capital leases Long-term debt Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Dividends declared - per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends declared – aggregate Dividends, Common Stock, Cash Dividends paid - per share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Dividends paid – aggregate Schedule of Dividends Activity Dividends Declared [Table Text Block] Schedule of Reconciliation of the Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Income Taxes Income Tax Disclosure [Text Block] Deferred income taxes Deferred Income Tax Liabilities, Net Tax Cuts And Jobs Act of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Liability, Noncurrent Tax Cuts And Jobs Act of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Liability, Noncurrent Tax Cuts And Jobs Act of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Liability, Noncurrent Pension and post retirement liabilities Liability, Defined Benefit Plan, Noncurrent Restructuring and management transition reserve Restructuring Reserve, Noncurrent Uncertain tax positions Liability for Uncertainty in Income Taxes, Noncurrent Other liabilities Other Sundry Liabilities, Noncurrent Other long-term liabilities Interest income Less: amount capitalized for capital projects Total interest expense, net Schedule of Other Long-Term Liabilities Other Noncurrent Liabilities [Table Text Block] Creditable taxes (value added taxes) Value Added Tax Receivable, Current Vendor inventory deposits (prepaid) Prepaid Vendor Inventory Deposits, Current Prepaid Vendor Inventory Deposits, Current Prepaid income taxes Prepaid Taxes Prepaid insurance Prepaid Insurance Other Other Assets, Miscellaneous, Current Other current assets Earnings per Share (EPS) Earnings Per Share [Text Block] Summary of Other Current Liabilities Other Current Liabilities [Table Text Block] Payroll related Accrued Payroll Related Expenses, Current Accrued Payroll Related Expenses, Current Taxes other than income taxes Accrual for Taxes Other than Income Taxes, Current Benefits and pensions Accrued Employee Benefits and Pension, Current Accrued Employee Benefits and Pension, Current Freight and rebates Accrued Freight and Rebate Liabilities, Current Accrued Freight and Rebate Liabilities, Current Income taxes Accrued Income Taxes, Current Restructuring and management transition reserve Restructuring Reserve, Current Other Other Sundry Liabilities, Current Other current liabilities Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning balance Add: Goodwill from acquisition Goodwill, Acquired During Period Goodwill, ending balance Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of unrecognized (gain) loss Defined Benefit Plan, Amortization of Gain (Loss) Amortization of net transition obligation Defined Benefit Plan, Amortization of Transition Asset (Obligation) Exchange rate changes Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Net periodic cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Restricted stock Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Stock Issued During Period, Value, Restricted Stock Award, Gross Stock Issued During Period, Value, Restricted Stock Award, Gross Share Price Share Price Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Stock Granted, Value, Share-based Compensation, Gross Stock Granted, Value, Share-based Compensation, Gross Share-based Compensation, Performance Shares Award Outstanding Activity [Table Text Block] Share-based Compensation, Performance Shares Award Outstanding Activity [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Restructuring Costs Restructuring and Related Activities Disclosure [Text Block] Cost of goods sold Cost of Goods and Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Selling, general and administrative Selling, General and Administrative Expense Research & development expenses Research and Development Expense Total operating expenses Operating Expenses Operating income Operating Income (Loss) Foreign exchange loss (gain) Foreign Currency Transaction Gain (Loss), before Tax Other Income Other Income Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net income Net income attributable to participating common shareholders Income per participating share: Basic (in dollars per share) Diluted (in dollars per share) Weighted average participating shares outstanding: Basic (in shares) Diluted (in shares) Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Change in interest rate swaps, (net of tax of $0, $3, $0, and ($53)) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Change in pension and post-retirement plans, (net of tax of ($30), $58, $213, and $68) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Net Periodic Benefit Expense Schedule of Net Benefit Costs [Table Text Block] Schedule of Segment Reporting Information by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of Net Income to EBITDA Reconciliation Of Net Income (Loss) To EBITDA [Table Text Block] Reconciliation Of Net Income (Loss) To EBITDA [Table Text Block] Reconciliation of Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]