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Number of regional operating segments Number of Operating Segments Entity File Number Entity File Number Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Buildings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings Other accrued liabilities Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Unsecured Debt Unsecured Debt [Member] Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Stock-based compensation expense Share-based Payment Arrangement, Expense Number of citizens seeking damages Loss Contingency, Number of Plaintiffs Western Western Region [Member] Western region. Balance Sheet Location [Axis] Balance Sheet Location [Axis] Common stock Common Stock, Value, Issued Goodwill and Intangible Assets Disclosure [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Document Fiscal Year Focus Document Fiscal Year Focus Fiscal year ending December 31, 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Proceeds from debt borrowings Proceeds from Issuance of Long-term Debt and Capital Securities, Net Income tax provision (benefit) related to items of other comprehensive income (loss) Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Exercisable aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Entity Current Reporting Status Entity Current Reporting Status Bonds Bonds [Member] Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 ("New Hampshire Bonds") due April 2029 - fixed rate interest period through 2029; bearing interest at 2.95% Revenue Bond Series Two Thousand Thirteen Due Two Thousand Twenty Nine [Member] Revenue Bond Series Two Thousand Thirteen Due Two Thousand Twenty Nine [Member] Issuance of Class A common stock (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Fair value of assets acquired and liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Granted (in dollars 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 Percentage of attainment level Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Obligations settled Accrual for Environmental Loss Contingencies, Payments Common stock, shares issued Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Segment Reporting [Abstract] Interest expense Interest Expense [Member] Accounts receivable Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] Statement of Comprehensive Income [Abstract] Total stockholders' equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Interest accretion on landfill and environmental remediation liabilities Accretion Expense, Including Asset Retirement Obligations Total Business Combination, Consideration Transferred Total liabilities and stockholders' equity Liabilities and Equity Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of businesses acquired Number of Businesses Acquired Accumulated other comprehensive loss, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Address, City or Town Entity Address, City or Town Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Accrued payroll and related expenses Employee-related Liabilities, Current Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restricted Stock Unit Restricted Stock Units (RSUs) [Member] Other liabilities, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Hedging Relationship [Axis] Hedging Relationship [Axis] General and administration General and Administrative Expense Anti-dilutive potentially issuable shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Floor interest rate Derivative, Floor Interest Rate Revolving Credit Facility Due 2023 Revolving Credit Facility Due 2023 [Member] Revolving Credit Facility Due 2023 [Member] (Gain) loss on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Useful life of finite lived intangible assets Finite-Lived Intangible Asset, Useful Life Equity Component [Domain] Equity Component [Domain] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Liabilities: Liabilities [Abstract] Term Loan Facility Term Facility due 2023 (Term Loan A Facility) [Member] Term Facility due 2023 (Term Loan A Facility) [Member] Property, plant and equipment, net of accumulated depreciation and amortization of $916,529 and $900,882, respectively Property, Plant and Equipment, Net Fiscal year ending December 31, 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Entity Tax Identification Number Entity Tax Identification Number Interest Rate Derivative Interest Rate Contract [Member] Net income Net income (loss) Net income Net Income (Loss) Attributable to Parent Changes in assets and liabilities, net of effects of acquisitions and divestitures: Increase (Decrease) in Operating Capital [Abstract] LIBOR London Interbank Offered Rate (LIBOR) [Member] Weighted average percentage rate paid Derivative, Average Fixed Interest Rate Non-processing Resource Solutions Operations, Non-processing [Member] Resource Solutions Operations, Non-processing Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Interest rate swaps Interest Rate Derivative Liabilities, at Fair Value Earnings Per Share [Abstract] Processing Processing Services [Member] Processing Services Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Finance leases maturing through December 2107; bearing interest at a weighted average of 4.0% Finance Lease, Liability Southbridge Landfill non-cash closure charge Southbridge Landfill Non-cash Closure Charge The non-cash portion of the aggregate (recovery) charge recognized in the period associated with the unplanned closure of the Southbridge Landfill. (Recovery) charges are expected to be incurred through completion of the closure process Amounts reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Operating income Business Acquisitions Pro Forma Operating Income Loss The pro forma operating income for the period as if the business combination or combinations had been completed at the beginning of the period. Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Document Fiscal Period Focus Document Fiscal Period Focus Subsequent Events Subsequent Events, Policy [Policy Text Block] Processing Solid Waste Operations Processing [Member] Solid Waste Operations Processing [Member] Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Cost method investments Investments and Other Noncurrent Assets Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Resource Solutions Resource Solutions Region [Member] Resource Solutions Region [Member] Estimate of possible loss Loss Contingency, Estimate of Possible Loss Entity Filer Category Entity Filer Category Common Stock Common Stock [Member] Product and Service [Domain] Product and Service [Domain] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] DEBT Debt and Capital Leases Disclosures [Text Block] Summary of Reclassifications Out of Accumulated Other Comprehensive Loss Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent Fixed Rate Bonds Fixed Rate Bonds [Member] Fixed rate bonds. Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Secured Debt Secured Debt [Member] Income tax provision related to items of other comprehensive income Other Comprehensive Income (Loss), Tax Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Scrap yard and solid waste transfer station (in acres) Scrap Yard And Solid Waste Transfer Station Acreage of scrap yard owned by WSI. Intangible assets Finite-Lived Intangible Assets, Gross Unvested restricted stock (in shares) Weighted Average Number of Shares, Restricted Stock Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Processing Resource Solutions Operations, Processing [Member] Resource Solutions Operations, Processing Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Class A Common Stock Common Class A [Member] Diluted earnings per share attributable to common stockholders: Earnings Per Share, Diluted [Abstract] Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Revenue recognized fro performance obligation satisfied in previous period Contract with Customer, Performance Obligation Satisfied in Previous Period Notice of Intent to Sue under the Resource Conservation and Recovery Act Notice of Intent to Sue under the Resource Conservation and Recovery Act [Member] Notice of Intent to Sue under the Resource Conservation and Recovery Act [Member] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Other expense, net Nonoperating Income (Expense) Hedging Relationship [Domain] Hedging Relationship [Domain] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Ontario County, New York Class Action Litigation Ontario County, New York Class Action Litigation [Member] Ontario County, New York Class Action Litigation Stock Options Share-based Payment Arrangement, Option [Member] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Weighted average common shares outstanding Weighted average common shares outstanding, basic Weighted Average Number of Shares Outstanding, Basic Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Operating expenses: Costs and Expenses [Abstract] Document Information [Line Items] Document Information [Line Items] Revolving line of credit facility ("Revolving Credit Facility") due May 2023; bearing interest at LIBOR plus 1.75% Revolving Credit Facility Due May Two Thousand Twenty Three [Member] Revolving Credit Facility Due May Two Thousand Twenty Three [Member] Cash Flow Hedging Cash Flow Hedging [Member] Loss Contingencies [Table] Loss Contingencies [Table] Carrying Value Reported Value Measurement [Member] Plan Name [Domain] Plan Name [Domain] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Cash interest payments Interest Paid, Excluding Capitalized Interest, Operating Activities Hedging activity: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract] Right-of-use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability STOCKHOLDERS' EQUITY Shareholders' Equity and Share-based Payments [Text Block] Fiscal year ending December 31, 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Revenues Revenues Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Axis] Shares to be issued - acquisition Weighted Average Number of Shares, Contingently Issuable Remediation activities, participant share percentage Percentage Participation in Onsite Remediation Activities Percentage participation in onsite remediation activities. Provision for income taxes Provision for income taxes Income Tax Expense (Benefit) Cash income tax payments Income Taxes Paid, Net Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Title of Individual [Domain] Title of Individual [Domain] Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Local Phone Number Local Phone Number Schedule of Unaudited Pro forma Combined Information Business Acquisition, Pro Forma Information [Table Text Block] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Unvested Share-based Payment Arrangement, Tranche One [Member] Aggregate intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Summary of Debt Schedule of Debt [Table Text Block] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Environmental remediation liability Beginning balance Ending balance Accrual for Environmental Loss Contingencies Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment Principal amount of debt Long-term Debt, Gross Purchase Price: Business Combination, Consideration Transferred [Abstract] Entity Address, Address Line One Entity Address, Address Line One Covenants Not-to-Compete Noncompete Agreements [Member] Entity Emerging Growth Company Entity Emerging Growth Company Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Revenues Business Acquisition, Pro Forma Revenue Deferred income taxes Deferred Income Tax Expense (Benefit) Cash flow hedge derivatives, gross liability Derivative Liability, Fair Value, Gross Liability Non Employee Director Non Employee Director [Member] Non Employee Director [Member] Credit facility maximum Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] 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] Potsdam Environmental Remediation Potsdam Environmental Liability [Member] Potsdam environmental liability. Less accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Fair value of stock awards vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Maximum Maximum [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs OTHER ITEMS AND CHARGES Unusual or Infrequent Items, or Both, Disclosure [Text Block] Accumulated Deficit Retained Earnings [Member] Measurement Basis [Axis] Measurement Basis [Axis] Expense from acquisition activities Expense from Acquisition Activities The aggregate amount of expense associated with legal, consulting and other similar costs recognized during the accounting period associated with the acquisition and integration of acquired businesses or select development projects Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Anticipated cost Environmental Exit Costs, Anticipated Cost Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Weighted Average Remaining Contractual Term (years) and Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [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] Outstanding contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Award Type [Domain] Award Type [Domain] Floor interest rate received Derivative, Basis Spread on Variable Rate Trading Symbol Trading Symbol Denominators: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Exercisable at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Recycling Operation Recycling Operation [Member] Recycling Operation Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Other comprehensive income OCI, before Reclassifications, before Tax, Attributable to Parent Contractual term Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Proceeds from the exercise of share based awards Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] EARNINGS PER SHARE Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] CURRENT LIABILITIES: Liabilities, Current [Abstract] Cash Flows from Financing Activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Accretion expense Asset Retirement Obligation, Accretion Expense Recurring Fair Value, Recurring [Member] Segment Reporting Segment Reporting, Policy [Policy Text Block] Accounting Standards Adopted and Pending Adoption New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Basic earnings per share attributable to common stockholders: Earnings Per Share, Basic [Abstract]