Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Technical Services Technical Services [Member] This element represents the Technical Services segment of the entity. Industrial and Field Services Industrial and Field Services [Member] This element represents the Industrial and Field Services segment of the entity. Safety-Kleen Safety-Kleen [Member] Safety-Kleen [Member] Oil, Gas and Lodging Services Oil, Gas, and Lodging Segment [Member] Oil, Gas, and Lodging Segment [Member] Corporate Items Corporate and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Adjusted EBITDA Income (Loss) from Continuing Operations before Interest, Tax, Depreciation and Amortization, Net This element represents the income or loss from continuing operations before interest, taxes, depreciation and amortization to the economic entity. Reconciliation to Consolidated Statements of Operations: Reconciliation Between Adjusted EBITDA and Income Statement [Abstract] Reconciliation Between Adjusted EBITDA and Income Statement [Abstract] Accretion of environmental liabilities Accretion of Environmental Liabilities This element includes accretion expenditure that pertains to asset retirement obligations and environmental remediation. Depreciation and amortization Depreciation, Depletion and Amortization Goodwill impairment charge Goodwill, Impairment Loss Income from operations Operating Income (Loss) Other expense Other Nonoperating Income (Expense) Loss on early extinguishment of debt Gain (Loss) on Extinguishment of Debt Gain on sale of business Gain (Loss) on Disposition of Business Interest expense, net of interest income Interest Income (Expense), Nonoperating, Net Income (loss) before (benefit) provision for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Intersegment revenues, net Intersegment Eliminations [Member] Corporate Items, net Corporate And Reconciling Items [Member] Corporate And Reconciling Items [Member] Direct revenues Operating Segments [Member] Total revenues Revenues Disclosure of Compensation Related Costs, Share-based Payments [Abstract] STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of changes to goodwill Schedule of Goodwill [Table Text Block] Summary of indefinite-lived intangible assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Schedule of finite-lived intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of expected amortization for the net carrying amount of finite lived intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Guarantor and Non-Guarantor Subsidiaries Financial Information [Abstract] -- None. No documentation exists for this element. -- Schedule of condensed consolidating balance sheet Condensed Balance Sheet [Table Text Block] Schedule of condensed consolidating statement of income Schedule of Condensed Consolidating Statement of Operations [Table Text Block] Disclosure of the condensed statement of operations normally using the registrant (parent) as the sole domain member. Schedule of condensed consolidating statement of cash flows Schedule of Condensed Consolidating Statement of Cash Flows [Table Text Block] Disclosure of the condensed statement of cash flows normally using the registrant (parent) as the sole domain member. Asset Retirement Obligation Disclosure [Abstract] Closure and Post-closure Liabilities [Table] Closure and Post-closure Liabilities [Table] The schedule that reflects each closure and post-closure liabilities, during the period. Closure and Post-closure Liabilities [Axis] Closure and Post-closure Liabilities [Axis] The information about each closure and post-closure liabilities during the period. Closure and Post-closure Liabilities [Domain] Closure and Post-closure Liabilities [Domain] Closure and Post-closure Liabilities [Domain] Landfill Retirement Liability Landfill Retirement Liability [Member] Represents the asset retirement obligations for landfill liability. Non-Landfill Retirement Liability Non-Landfill Retirement Liability [Member] Represents the asset retirement obligations for non-landfill liability. CLOSURE AND POST-CLOSURE LIABILITIES Closure and Post Closure Liabilities [Line Items] -- None. No documentation exists for this element. -- Changes to post-closure liabilities Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Beginning balance Asset Retirement Obligation Liabilities assumed in acquisitions Asset Retirement Obligation, Liabilities Assumed From Business Acquisitions, Originally Reported Asset Retirement Obligation, Liabilities Assumed from Business Acquisitions, Originally Reported Measurement period adjustments from prior period acquisitions Asset Retirement Obligation, Liabilities Assumed from Business Acquisitions, Measurement Period Adjustment Asset Retirement Obligation, Liabilities Assumed from Business Acquisitions, Measurement Period Adjustment New asset retirement obligations Asset Retirement Obligation, Liabilities Incurred Adjustment related to disposition of business Asset Retirement Obligation, Adjustment Related to Disposition of Business Asset Retirement Obligation, Adjustment Related to Disposition of Business Accretion Asset Retirement Obligation, Accretion Expense Changes in estimates recorded to statement of operations Asset Retirement Obligation, Changes Recorded in Statement of Income The amount of change in the asset retirement obligation, during the current period, for changes in estimates recorded in the statement of income. Changes in estimates recorded to balance sheet Asset Retirement Obligation, Changes Recorded in Balance Sheet Represents the amount of change in the asset retirement obligation, during the current period for other changes in estimates recorded in the balance sheet. Expenditures Asset Retirement Obligation, Liabilities Settled Currency translation and other Asset Retirement Obligation, Foreign Currency Translation Gain (Loss) Ending balance Credit-adjusted risk-free rate Asset Retirement Obligations Discount Rate Asset Retirement Obligations Discount Rate Schedule of Finite-lived and Indefinite-lived Intangible Assets [Table] Schedule of Finite-lived and Indefinite-lived Intangible Assets [Table] Schedule of Finite-lived and Indefinite-lived Intangible Assets [Table] 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] Permits Permits [Member] The description that pertains to the permits. Customer and supplier relationships Customer Relationships [Member] Other intangible assets Other Intangible Assets [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trademarks and trade names Trademarks [Member] Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] [Line Items] for Schedule of Finite-lived and Indefinite-lived Intangible Assets [Table] Cost Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Finite-Lived Intangible Assets, Net Weighted Average Remaining Amortization Period (in years) Finite-Lived Intangible Asset, Useful Life Trademarks and trade names Indefinite-Lived Intangible Assets (Excluding Goodwill) Total permits and other intangible assets, Cost Intangible Assets, Gross (Excluding Goodwill) Total permits and other intangible assets, Net Intangible Assets, Net (Excluding Goodwill) Property, Plant and Equipment [Abstract] PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Payables and Accruals [Abstract] ACCRUED EXPENSES Accrued Expenses Disclosure [Text Block] The entire disclosure for accrued expenses at the end of the reporting period. Accounting Policies [Abstract] SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Equity [Abstract] Schedule of accumulated other comprehensive loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of accumulated other comprehensive loss Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Transformer Services Transformer Services [Member] Transformer Services [Member] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Total current assets Disposal Group, Including Discontinued Operation, Assets, Current Property, plant and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Total other assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Total assets divested Disposal Group, Including Discontinued Operation, Assets Total current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current Total other liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Total liabilities divested Disposal Group, Including Discontinued Operation, Liabilities Net carrying value divested Disposal Group, Including Discontinued Operation, Assets (Liabilities), Net Disposal Group, Including Discontinued Operation, Assets (Liabilities), Net Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Eurodollar Eurodollar [Member] Base Rate Base Rate [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured debt Secured Debt [Member] Unsecured debt Unsecured Debt [Member] Line of Credit Line of Credit [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Term Loan Agreement Term Loan Agreement [Member] Term Loan Agreement [Member] Senior unsecured notes, at 5.25%, due August 1, 2020 (2020 Notes) Unsecured Senior Notes 2020 [Member] Unsecured Senior Notes 2020 [Member] Senior unsecured notes, at 5.125%, due June 1, 2021 (2021 Notes) Unsecured Senior Notes 2021 [Member] Unsecured Senior Notes 2021 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Senior secured credit agreement amount Debt Instrument, Face Amount Prepayment premium Debt Instrument, Interest Rate, Prepayment Premium Debt Instrument, Interest Rate, Prepayment Premium Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Periodic Payment, Percentage of Face Amount Debt Instrument, Periodic Payment, Percentage of Face Amount Debt Instrument, Periodic Payment, Percentage of Face Amount Amount used to repurchase notes Debt Instrument, Repurchased Face Amount Repurchased amount Debt Instrument, Repurchase Amount Accrued interest paid Interest Paid Premiums to repay debt early Payment for Debt Extinguishment or Debt Prepayment Cost Expenses incurred from financing Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Redemption price percentage Debt Instrument, Redemption Price, Percentage Early Repayment of Senior Debt Early Repayment of Senior Debt Debt fair value Long-term Debt, Fair Value Revolving credit facility maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Outstanding loan balances Long-term Line of Credit Available to borrow and outstanding letters of credit Line of Credit Facility, Remaining Borrowing Capacity Outstanding letters of credit Letters of Credit Outstanding, Amount Final sale proceeds Disposal Group, Including Discontinued Operation, Consideration Proceeds, net of transactional related costs Proceeds from Divestiture of Businesses, Net of Cash Divested Transactional related costs Disposal Group, Including Discontinued Operation, Transaction Costs Disposal Group, Including Discontinued Operation, Transaction Costs Pre-tax gain Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal ACCUMULATED OTHER COMPREHENSIVE LOSS Comprehensive Income (Loss) Note [Text Block] Statement of Stockholders' Equity [Abstract] Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Balance at beginning of year Goodwill Increase from current period acquisitions Goodwill, Acquired During Period Measurement period adjustments from prior period acquisitions Goodwill, Purchase Accounting Adjustments Decrease from disposition of business Goodwill, Written off Related to Sale of Business Unit Foreign currency translation and other Goodwill, Foreign Currency Translation Gain (Loss) Balance at end of year Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Maximum Maximum [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted stock awards Restricted Stock [Member] Performance stock awards Performance Stock Awards [Member] Performance Stock Awards [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation Allocated Share-based Compensation Expense Income tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Period for recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Fair value restricted stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Shares authorized for repurchase Stock Repurchase Program, Authorized Amount Repurchases of common stock (in shares) Stock Repurchased and Retired During Period, Shares Repurchases of common stock Stock Repurchased and Retired During Period, Value Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Summary of the entity's financial arrangements Schedule of Long-term Debt Instruments [Table Text Block] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Ending balance (in shares) Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning of period (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value End of period (in USD per share) Number of operating segments Number of Operating Segments New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Earnings Retained Earnings [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Updated 2016-09 Accounting Standards Updated 2016-09 [Member] Accounting Standards Updated 2016-09 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Cumulative effect of change in accounting for stock based compensation Cumulative Effect of New Accounting Principle in Period of Adoption Environmental Remediation Obligations [Abstract] Site Contingency [Table] Site Contingency [Table] Environmental Remediation Site [Axis] Environmental Remediation Site [Axis] Environmental Remediation Site [Domain] Environmental Remediation Site [Domain] Remedial Liabilities for Landfill Sites Remedial Liabilities for Landfill Sites [Member] This element represents the details that pertain to the remedial liability for landfill sites. Remedial Liabilities for Inactive Sites Remedial Liabilities for Inactive Sites [Member] This element represents the details that pertain to the remedial liabilities for inactive sites. Remedial Liabilities (Including Superfund) for Non-Landfill Operations Remedial Liabilities (Including Superfund) for Non-Landfill Operations [Member] This element represents the details that pertain to the remedial liabilities for non-landfill sites. Remedial liabilities Site Contingency [Line Items] Accrual for Environmental Loss Contingencies [Roll Forward] Accrual for Environmental Loss Contingencies [Roll Forward] Balance at beginning of year Accrual for Environmental Loss Contingencies Measurement period adjustments from prior period acquisitions Accrual for Environmental Loss Contingencies, Increase (Decrease) for Acquisitions and Divestitures, Measurement Period Adjustment Accrual for Environmental Loss Contingencies, Increase (Decrease) for Acquisitions and Divestitures, Measurement Period Adjustment Accretion Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses Changes in estimates recorded to statement of operations Accrual for Environmental Loss Contingencies, Revision in Estimates Expenditures Accrual for Environmental Loss Contingencies, Payments Currency translation and other Accrual for Environmental Loss Contingencies, Increase (Decrease) for Currency Translation and Other The increase or decrease in the accrual for environmental loss contingencies, during the reporting period that is related to currency translations and other adjustments. Balance at end of year Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Reportable Legal Entities Reportable Legal Entities [Member] Consolidating Adjustments Consolidation, Eliminations [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Clean Harbors, Inc. Parent Company [Member] Guarantor Subsidiaries Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries Non-Guarantor Subsidiaries [Member] Consolidating statement of income Condensed Financial Statements, Captions [Line Items] Revenues: Revenues [Abstract] Service revenues Sales Revenue, Services, Net Product revenues Sales Revenue, Goods, Net Total revenues Cost of revenues (exclusive of items shown separately below) Cost of Revenue [Abstract] Service cost of revenues Cost of Services Product cost of revenues Cost of Goods Sold Total cost of revenues Cost of Revenue Selling, general and administrative expenses Selling, General and Administrative Expense Unrealized holding gains on available-for-sale investments Loss on early extinguishment of debt (Loss) gain on sale of businesses Interest (expense) income Equity in earnings of subsidiaries, net of taxes Income (Loss) from Affiliates Subsidiaries and Holding Company Represents the income (loss) from affiliates, subsidiaries and the holding company. Intercompany interest income (expense) Net Interest Income from Affiliates Subsidiaries and Holding Company Represents the net interest income from affiliates, subsidiaries and the holding company. (Benefit) provision for income taxes Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2017 (three months) Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Property, plant and equipment, net Property, Plant and Equipment, Net Goodwill Permits and other intangibles, net Total assets Assets 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 allowances aggregating $28,537 and $29,249, respectively Accounts Receivable, Net, Current Unbilled accounts receivable Unbilled Accounts Receivable, Current The aggregate amount of unbilled receivables due for services rendered or to be rendered at the financial statement date, which are usually due within one year (or one business cycle). Deferred costs Debt Issuance Costs, Current, Net Inventories and supplies Prepaid Supplies Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Other assets: Other Assets, Noncurrent [Abstract] Other Other Assets, Noncurrent Total other assets Assets, Noncurrent, Excluding Property, Plant and Equipment Sum of the carrying amounts as of the balance sheet date of all assets (excluding property, plant and equipment) that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of long-term obligations Long-term Debt, Current Maturities Accounts payable Accounts Payable, Current Deferred revenue Deferred Revenue and Credits, Current Accrued expenses Accrued Liabilities, Current Current portion of closure, post-closure and remedial liabilities Accrued Capping, Closure, Post Closure and Remedial Liabilities, Current The amount of estimated costs accrued as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility (such as a landfill or waste treatment facility) and to remediate one or more sites. Represents the portion that will be paid within one year. Total current liabilities Liabilities, Current Other liabilities: Other Liabilities, Noncurrent [Abstract] Closure and post-closure liabilities, less current portion of $4,077 and $6,220, respectively Accrued Capping, Closure, Post-closure and Environmental Costs, Noncurrent Remedial liabilities, less current portion of $15,439 and $13,796, respectively Accrued Environmental Loss Contingencies, Noncurrent Long-term obligations, less current portion Long-term Debt, Excluding Current Maturities Deferred taxes, unrecognized tax benefits and other long-term liabilities Unrecognized Tax Benefits and Other Long-term Liabilities, Noncurrent The noncurrent portion of the amount that is recognized for the unrecognized tax benefits and other long-term liabilities as of the balance sheet date. Total other liabilities Liabilities, Noncurrent Commitments and contingent liabilities (See Note 15) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Authorized 80,000,000; shares issued and outstanding 56,926,549 and 57,297,978 shares, respectively Common Stock, Value, Issued Shares held under employee participation plan Common Stock Issued, Employee Trust, Deferred Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated earnings Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and stockholders’ equity Liabilities and Equity Summary of restricted stock awards Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Summary of performance stock awards Schedule of Nonvested Performance-based Units Activity [Table Text Block] Earnings Per Share [Abstract] EARNINGS (LOSS) PER SHARE Earnings Per Share [Text Block] Statement of Comprehensive Income [Abstract] Unrealized gains (losses) on available-for-sale securities, taxes Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Reclassification adjustment for gains on available-for-sale securities included in net (loss) income taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax CLOSURE AND POST-CLOSURE LIABILITIES Asset Retirement Obligation Disclosure [Text Block] Condensed consolidating balance sheet Intercompany receivables Receivables from Affiliates Subsidiaries and Holding Companies This element represents receivables from affiliates, subsidiaries and the holding company. Accounts receivables, net Other current assets Other Assets, Current Investments in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Intercompany debt receivable Debt Receivable from Affiliates Subsidiaries and Holding Companies This element represents debts receivable from the affiliates, subsidiaries and the holding company. Other long-term assets Other Assets, Miscellaneous, Noncurrent Current liabilities Intercompany payables Payables to Affiliates Subsidiaries and Holding Companies This element represents payables to affiliates, subsidiaries and the holding company. Closure, post-closure and remedial liabilities, net Closure Post Closure and Remedial Liabilities, Net The net amount of closure, post-closure and remedial liabilities that is required as of the balance sheet date, which will be paid after one year or beyond the normal operating cycle, if longer. Intercompany debt payable Debt Payable to Affiliates Subsidiaries and Holding Companies This element represents the debts payable to the affiliates, subsidiaries and the holding company. Other long-term liabilities Total liabilities Liabilities Stockholders’ equity Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Changes to remedial liabilities Schedule of Environmental Loss Contingencies by Site [Table Text Block] Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES Canada CANADA Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION Condensed Financial Information for Subsidiary Guarantors and Non Guarantors Disclosure [Text Block] This element represents the disclosure of the condensed financial statements (balance sheet, income statement and statement of cash flows), normally using the registrant (parent) as the sole domain member. If condensed consolidating financial statements are being presented, other domain members (in addition to parent) such as guarantor subsidiaries, non-guarantor subsidiaries, and the consolidation eliminations, will be included in order that the respective monetary amounts for each of the domains will aggregate to the respective amounts on the consolidated financial statements. The line items are the various captions used to compile the condensed financial statements. Using extensions, most, if not all, of the elements representing condensed financial statement captions will be the same as those used for the consolidated financial statements captions. Inventory Disclosure [Abstract] Oil and oil products Energy Related Inventory, Crude Oil, Products and Merchandise Supplies and drums Energy Related Inventory Supplies and Drums Energy Related Inventory Supplies and Drums Solvent and solutions Energy Related Inventory, Chemicals Modular camp accommodations Energy Related Inventory Modular Camp Accommodations Energy Related Inventory Modular Camp Accommodations Other Energy Related Inventory Other Energy Related Inventory and Supplies Other Total inventories and supplies Transfer of inventory to property, plant and equipment Transfer of Inventory to Property, Plant and Equipment Transfer of Inventory to Property, Plant and Equipment Schedule of closure and post-closure liabilities Schedule of Change in Asset Retirement Obligation [Table Text Block] INVENTORIES AND SUPPLIES Inventory Disclosure [Text Block] Reclassifications Comparability of Prior Year Financial Data, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Accrued expenses Schedule of Accrued Liabilities [Table Text Block] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Unrecognized tax benefits Unrecognized Tax Benefits Interest on unrecognized tax benefits Unrecognized Tax Benefits, Interest on Income Taxes Accrued Reduction in unrecognized tax benefits from expiring statue of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations 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 Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized (Losses) Gains on Available-For-Sale Securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Unfunded Pension Liability Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Total AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Components of Other Accumulated Income, Net of Tax [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, before Tax Amounts reclassified out of accumulated other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Tax effects Other Comprehensive Income (Loss), Tax Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Balance at end of period Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] At Acquisition Dates Scenario, Previously Reported [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] 2016 Acquisitions 2016 Business Acquisitions [Member] 2016 Business Acquisitions [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Measurement period adjustments, accounts receivable Business Combination, Measurement Period Adjustments, Current Assets, Receivables Business Combination, Measurement Period Adjustments, Current Assets, Receivables Inventories and supplies Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Measurement period adjustment, inventories and supplies Business Combination, Measurement Period Adjustments, Inventory Business Combination, Measurement Period Adjustments, Inventory Prepaid and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Measurement period adjustment, prepaid and other current assets Business Combination, Measurement Period Adjustment, Prepaid Expenses and Other Assets Business Combination, Measurement Period Adjustment, Prepaid Expenses and Other Assets Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Measurement period adjustments, property, plant and equipment Business Combination, Measurement Period Adjustments, Property Plant and Equipment Business Combination, Measurement Period Adjustments, Property Plant and Equipment Permits and other intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Measurement period adjustments, permits and other intangibles Business Combination, Measurement Period Adjustment, Other Than Goodwill Business Combination, Measurement Period Adjustment, Other Than Goodwill Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Measurement period adjustments, current liabilities Business Combination, Measurement Period Adjustment, Current Liabilities Business Combination, Measurement Period Adjustment, Current Liabilities Closure and post-closure liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Closure and Post-Closure Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Closure and Post-Closure Liabilities Measurement period adjustments, closure and post-closure liabilities Business Combination, Measurement Period Adjustments, Closure and Post Closure Liabilities Business Combination, Measurement Period Adjustments, Closure and Post Closure Liabilities Remedial liabilities, less current portion Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Remedial Liabilities, Excluding Current Portion Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Remedial Liabilities, Excluding Current Portion Measurement period adjustments, remedial liabilities, less current portion Business Combination, Measurement Period Adjustments, Remedial Liabilities, Excluding Current Portion Business Combination, Measurement Period Adjustments, Remedial Liabilities, Excluding Current Portion Deferred taxes, unrecognized tax benefits and other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deferred Taxes, Unrecognized Tax Benefits and Other Long-term Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deferred Taxes, Unrecognized Tax Benefits and Other Long-term Liabilities Measurement period adjustments, deferred taxes, unrecognized tax benefits and other long-term liabilities Business Combination, Measurement Period Adjustments, Deferred Taxes Unrecognized Tax Benefits and Other Long Term Liabilities Business Combination, Measurement Period Adjustments, Deferred Taxes Unrecognized Tax Benefits and Other Long Term Liabilities Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Measurement period adjustments, total identifiable net assets Business Combination, Measurement Period Adjustments, Net Business Combination, Measurement Period Adjustments, Net Measurement period adjustments, goodwill Business Combination, Measurement Period Adjustment, Goodwill Business Combination, Measurement Period Adjustment, Goodwill Total purchase price, net of cash acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Measurement period adjustments, total purchase price, net of cash acquired Business Combination, Measurement Period Adjustment, Goodwill And Liabilities Assumed Net Business Combination, Measurement Period Adjustment, Goodwill And Liabilities Assumed Net Net income (loss) Other comprehensive income (loss): Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract] Unrealized gains (losses) on available-for-sale securities (net of tax (benefit) of $7, $(238), $129 and $(238), respectively) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for losses on available-for-sale securities included in net income (loss) (net of taxes of $0, $0, $79 and $0, respectively) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Asset retirement costs (non-landfill) Asset Retirement Obligation Costs [Member] Landfill assets Landfill [Member] Buildings and improvements Building and Building Improvements [Member] Camp equipment Camp Equipment [Member] Represents the industrial lodging facilities that are utilized in the entity's Industrial Services segment to provide lodging services to companies in the refinery and petrochemical industries. Vehicles Vehicles [Member] Equipment Equipment [Member] Furniture and fixtures Furniture and Fixtures [Member] Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Total property, plant and equipment, gross Property, Plant and Equipment, Gross Less - accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property, plant and equipment, net Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] FINANCING ARRANGEMENTS Debt Disclosure [Text Block] Number of acquisitions Number of Businesses Acquired Number of re-refineries acquired Number of Re-Refineries Acquired Number of Re-Refineries Acquired Purchase price Business Combination, Consideration Transferred Washer Machines and Related Equipment Privately Held Washing Machine Company [Member] Privately Held Washing Machine Company [Member] Lonestar Lonestar [Member] Lonestar [Member] 2017 Acquisitions 2017 Acquisitions [Member] 2017 Acquisitions [Member] Goodwill recognized Cash paid to acquire Lonestar Payments to Acquire Businesses, Gross Equity payout (in CAD per share) Business Acquisition, Share Price Debt outstanding assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Consolidating Adjustments Condensed consolidating statement of cash flows Net cash from operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from (used in) investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Additions to property, plant and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale and disposal of fixed assets Payments for (Proceeds from) Productive Assets Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds on sale of business Proceeds from Divestiture of Businesses Additions to intangible assets, including costs to obtain or renew permits Payments to Acquire Intangible Assets Purchases of available-for-sale securities Payments to Acquire Available-for-sale Securities Proceeds from sale of investments Proceeds from Sale and Maturity of Available-for-sale Securities Intercompany Intercompany, Investing Intercompany, Investing Intercompany debt Intercompany Debt, Investing Intercompany Debt, Investing Investment in subsidiaries Payments to Acquire Interest in Subsidiaries and Affiliates Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows used in financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Change in uncashed checks Increase (Decrease) in Outstanding Checks, Financing Activities Proceeds from exercise of stock options Proceeds from Stock Options Exercised Issuance of restricted shares, net of shares remitted Payments Related to Tax Withholding for Share-based Compensation Repurchases of common stock Payments for Repurchase of Common Stock Deferred financing costs paid Payments of Financing Costs Excess tax benefit of stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Premiums paid on early extinguishment of debt Principal payment on debt Repayments of Unsecured Debt Issuance of senior secured notes, net of discount Proceeds from Issuance of Senior Long-term Debt Issuance of senior unsecured notes, including premium Proceeds from Issuance of Long-term Debt Intercompany Intercompany, Financing Intercompany, Financing Intercompany debt Intercompany Debt, Financing Intercompany Debt, Financing Net cash (used in) from financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate change on cash Effect of Exchange Rate on Cash and Cash Equivalents Increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Allowance for doubtful accounts Provision for Doubtful Accounts Amortization of deferred financing costs and debt discount Amortization of Debt Issuance Costs and Discounts Changes in environmental liability estimates Other Increase (Decrease) in Environmental Liabilities Deferred income taxes Deferred Income Tax Expense (Benefit) Stock-based compensation Share-based Compensation Excess tax benefit of stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Net tax deficiency on stock based awards Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Other expense Other Noncash Income (Expense) Environmental expenditures Payments for Environmental Liabilities Changes in assets and liabilities, net of acquisitions Increase (Decrease) in Operating Capital [Abstract] Accounts receivable and unbilled accounts receivable Increase (Decrease) in Accounts Receivable Inventories and supplies Increase (Decrease) in Inventories Other current assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Other current and long-term liabilities Increase (Decrease) in Other Operating Liabilities Net cash from operating activities Cash flows used in investing activities: Proceeds from sale and disposal of fixed assets Additions to intangible assets, including costs to obtain or renew permits Cash flows from financing activities: Proceeds from exercise of stock options Issuance of restricted shares, net of shares remitted Deferred financing costs paid Increase in cash and cash equivalents Supplemental information: Supplemental Cash Flow Information [Abstract] Cash payments for interest and income taxes: Cash Payments for Interest and Income Taxes [Abstract] Description and amounts of long lived assets and liabilities held for sale. Disclosure may include the description of the facts and circumstances leading to the expected disposal, manner and timing of disposal, the carrying value of the assets and liabilities held for sale, the gain or loss recognized in the income statement and the income statement caption that includes that gain or loss. Interest paid Interest Paid, Net Income taxes paid Income Taxes Paid, Net Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Accrual for repurchased shares Accrual for Repurchased Shares Accrual for Repurchased Shares Property, plant and equipment accrued Noncash or Part Noncash Acquisition, Value of Assets Acquired Receivable for estimated purchase price adjustment Noncash Or Part Noncash Acquisition, Receivable For Estimated Purchase Price Adjustment Noncash Or Part Noncash Acquisition, Receivable For Estimated Purchase Price Adjustment Amortization of permits and other intangible assets Amortization of Intangible Assets Catalyst Services Catalyst Services [Member] Catalyst Services [Member] Additional final sale proceeds Income before provision for income taxes Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax Income Statement [Abstract] Service revenues Product revenues Other expense Interest expense, net of interest income of $573, $196, $1,098 and $571, respectively Provision for income taxes Earnings (loss) per share: Basic (in USD per share) Earnings Per Share, Basic Diluted (in USD per share) Earnings Per Share, Diluted Shares used to compute loss per share - Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Shares used to compute loss per share - Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Interest expense Investment Income, Interest Interest costs capitalized adjustment Interest Costs Capitalized Adjustment Depreciation inclusive of amortization Depreciation Inclusive of Amortization Depreciation Inclusive of Amortization Insurance Accrued Insurance, Current Interest Interest Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Income, real estate, sales and other taxes Taxes Payable, Current Other Other Accrued Liabilities, Current Total accrued expenses Accrued legal matters Estimated Litigation Liability, Current Accrued severance charges Supplemental Unemployment Benefits, Severance Benefits Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Long-term obligations Long-term Debt, Gross Unamortized debt issuance costs and debt discount/premium, net Debt Issuance Costs, Net Long-term obligations, at carrying value Total current and long-term obligations, at carrying value Long-term Debt Interest rate Debt Instrument, Interest Rate, Stated Percentage Reconciliation of third party revenues to direct revenues Schedule of Segment Revenues [Table Text Block] Tabular disclosure of the direct revenues for each reportable segment, including a reconciliation to consolidated third party revenues. Reconciliation to consolidated statements of income from adjusted EBITDA Schedule of Reconciliation of Net Income to Adjusted Earnings before Interest Tax Depreciation and Amortization Consolidated [Table Text Block] This element may be used to capture the complete disclosure of the identification, description, and amounts of all significant reconciling items used in the reconciliation of net income to adjusted earnings before interest, tax, depreciation and amortization of continuing operations. PP&E, intangible assets and total assets by segment Schedule Of Property Plant And Equipment, Intangible Assets And Total Assets By Segment [Table Text Block] Tabular disclosure of property, plant and equipment, intangible assets, and total assets for each reportable segment, including a reconciliation to consolidated amounts. Total assets by geographical area Schedule of Total Assets by Geographical Area [Table Text Block] Tabular disclosure of total assets by geographical area, including a reconciliation to consolidated amounts. Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Performance Shares Performance Shares [Member] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Shares excluded from computation of earning per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Ownership percentage of U.S. guarantor subsidiaries Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Commitments and Contingencies Disclosure [Abstract] Environmental Contingencies [Table] Environmental Contingencies [Table] Discloses the specific components (such as the nature, name, and date) of the environmental contingencies and gives the possible estimates, or states that a reasonable estimate cannot be made. Contingencies by Nature of Contingency [Axis] Contingencies by Nature of Contingency [Axis] Quantifies and describes each contingency that exists as of the balance sheet date, by nature of the probable or possible estimates. Contingency Nature [Domain] Contingency Nature [Domain] An existing condition, situation, or a set of circumstances, which involve uncertainty as to the possible outcomes to an enterprise that will ultimately be resolved, when one or more future events occur or fail to occur. Resolution of the uncertainty may confirm the incurrence of a loss or profit or the incurrence of a liability. Legal and Administrative Proceedings Legal and Administrative Proceedings [Member] Represents the actual or potential liabilities that are related to the legal and administrative proceedings. Ville Mercier Ville Mercier [Member] Represents the details that pertain to the Ville Mercier. Superfund Proceedings Superfund Proceedings [Member] Represents the indemnification obligations under federal or state Superfund laws. ChemWaste Certain Other Third Party Sites [member] Represents the details that pertain to Certain Other Third Party Sites. Safety-Kleen Kleen Performance Products [Member] Kleen Performance Products Federal and State Enforcement Actions Federal and State Enforcement Actions [Member] The regulatory proceedings that are relating primarily to waste treatment, storage or disposal facilities. Contingencies [Line Items] Contingencies [Line Items] -- None. No documentation exists for this element. -- Recorded reserves for actual or probable liabilities Loss Contingency Accrual Possible increase in legal and administrative proceedings Loss Contingency Accrual at Carrying Value Potential Additional Liability The amount as of the balance sheet date of potential needed increase in the loss contingency reserves. Number of permits issued by government, for dumping organic liquid Number of Permits Issued by Government to Dump Organic Liquid The number of permits that are granted by the government in relation to environmental liabilities. Number of neighboring municipalities filing separate legal proceedings against the Mercier Subsidiary and the Government of Quebec Number of Neighboring Municipalities Filing Separate Legal Proceedings This element represents the number of municipalities other than Ville Mercier that filed legal proceedings against the Mercier Subsidiary. General damages sought Loss Contingency, General Damages Sought, Value Loss Contingency, General Damages Sought, Value Punitive damages sought Loss Contingency, Punitive Damages Sought, Value Loss Contingency, Punitive Damages Sought, Value Number of proceedings, potential sanctions equal to or exceed $100,000 Loss Contingency, Pending Claims, Number Number of product liability claims settled or dismissed Loss Contingency, Claims Settled and Dismissed, Number Number of sites owned by third party excluded from cleanup or related liabilities Site Contingency, Number of Sites The number of sites that are subject to proceedings under federal or state superfund laws brought against the company or against third parties for which the company may have certain indemnification obligations. Number of sites owned by the entity subject to proceedings under federal or state superfund laws Site Contingency, Number of Sites Owned by Entity The number of sites that are subject to proceedings under federal or state superfund laws that are owned by the entity. Notices received from owners of third party sites seeking indemnification from the company Site Contingency, Number of Sites Owned by Third Party The number of sites owned by third parties subject to proceedings under federal or state Superfund laws for which the company or the prior owners shipped wastes. Number of sites for which environmental remediation expense is settled Site Contingency, Environmental Remediation Expense Settled Number of Sites Owned by Third Party The number of sites owned by the third party for which environmental remediation expense is settled. Third party sites requiring expenditure on remediation Site Contingency, Environmental Remediation Expense Number of Sites Owned by Third Party The number of sites for which environmental remediation expense is incurred subject to proceedings under federal or state superfund laws owned by third party. Number of sites not currently requiring expenditures on remediation Site Contingency, Not Requiring Environmental Remediation Expense Number of Sites Owned by Third Party The number of sites owned by the third party for which environmental remediation expense is not required. Minimum potential liability Loss Contingency, Estimate of Possible Loss Number of sites which potential liability could exceed $100,000 Number of Sites, Potential Liability Exceeds Substantial Quota Number of Sites, Potential Liability Exceeds Substantial Quota Indemnification agreement with third party sites Site Contingency, Indemnification Agreement Number of Sites Owned by Third Party The number of sites for which the company has an indemnification agreement from the third party seller. Notices received from owners of third party sites seeking indemnification from the company Site Contingency, Notice Received Number of Sites Owned by Third Party The number of notices received from owners of third party sites related to the CSD assets seeking indemnification from the company. DISPOSITION OF BUSINESS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Account receivable, allowances aggregating Allowance for Doubtful Accounts Receivable, Current Closure and post-closure liabilities, current portion Accrued Capping, Closure, Post-closure and Environmental Costs Remedial liabilities, current portion Accrued Environmental Loss Contingencies, Current Common stock, authorized shares (in shares) Common Stock, Shares Authorized Common stock, issued shares (in shares) Common Stock, Shares, Issued Common stock, outstanding shares (in shares) Common Stock, Shares, Outstanding Disposition of Business Disposal Groups, Including Discontinued Operations [Table Text Block] Numerator for basic and diluted earnings (loss) per share: Numerator for Basic and Diluted Earnings Per Share [Abstract] -- None. No documentation exists for this element. -- Denominator: Denominator for Basic and Diluted Earnings Per Share [Abstract] -- None. No documentation exists for this element. -- Basic shares outstanding (in shares) Dilutive effect of equity-based compensation awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive shares outstanding (in shares) Basic loss per share (in USD per share) Diluted loss per share (in USD per share) SEGMENT REPORTING Segment Reporting Disclosure [Text Block] REMEDIAL LIABILITIES Environmental Loss Contingency Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Reconciliation of basic and diluted earnings per share computations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Statement [Table] Statement [Table] Common Stock Common Stock [Member] Shares Held Under Employee Participation Plan Shares Held Under Employee Participation Plan [Member] Common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees but not yet earned. Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity Balance beginning of period (in shares) Shares, Issued Other comprehensive income Stock-based compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Issuance of restricted shares, net of shares remitted Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of restricted shares, net of shares remitted (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Shares held under employee participation plan Stock Repurchased During Period, Value Shares held under employee participation plan (in shares) Stock Repurchased During Period, Shares Repurchases of common stock Repurchases of common stock (in shares) Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Balance ending of period (in shares)