$CWST
CASELLA WASTE SYSTEMS INC Stock $cwst

$cwst Overview Financials Valuation SEC Filings Company Website

2023 Q4 Form 10-K Financial Statement

#000091117724000005 Filed on February 16, 2024

Income Statement

Concept	2023 Q4	2023
Revenue	$359.6M	$1.265B
YoY Change	32.13%	16.54%
Cost Of Revenue	$239.2M	$832.0M
YoY Change	29.75%	15.06%
Gross Profit	$120.4M	$432.5M
YoY Change	37.14%	19.49%
Gross Profit Margin	33.48%	34.2%
Selling, General & Admin	$43.13M	$155.8M
YoY Change	20.75%	16.81%
% of Gross Profit	35.82%	36.03%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$54.61M	$170.7M
YoY Change	64.25%	35.1%
% of Gross Profit	45.36%	39.47%
Operating Expenses	$97.74M	$326.6M
YoY Change	41.73%	25.71%
Operating Profit	$22.66M	$80.43M
YoY Change	20.34%	-15.69%
Interest Expense	-$12.95M	$47.58M
YoY Change	109.04%	100.56%
% of Operating Profit	-57.16%	59.16%
Other Income/Expense, Net	$629.0K	-$43.38M
YoY Change	3.62%	112.37%
Pretax Income	$1.038M	$37.05M
YoY Change	-91.08%	-50.58%
Income Tax	$2.849M	$11.65M
% Of Pretax Income	274.47%	31.44%
Net Earnings	-$1.811M	$25.40M
YoY Change	-121.51%	-52.15%
Net Earnings / Revenue	-0.5%	2.01%
Basic Earnings Per Share		$0.46
Diluted Earnings Per Share	-$0.03	$0.46
COMMON SHARES
Basic Shares Outstanding		55.17M shares
Diluted Shares Outstanding		55.27M shares

Balance Sheet

Concept	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$220.9M	$220.9M
YoY Change	210.48%	210.48%
Cash & Equivalents	$220.9M	$220.9M
Short-Term Investments
Other Short-Term Assets	$9.918M	$48.09M
YoY Change	46.13%	118.89%
Inventory	$17.86M	$17.86M
Prepaid Expenses	$17.22M
Receivables	$157.3M	$157.3M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$426.3M	$426.3M
YoY Change	105.48%	105.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.081B	$1.081B
YoY Change	33.08%	33.08%
Goodwill	$735.7M
YoY Change	168.04%
Intangibles
YoY Change
Long-Term Investments	$0.00	$10.97M
YoY Change		0.0%
Other Assets	$26.26M	$50.65M
YoY Change	-3.16%	-2.44%
Total Long-Term Assets	$2.109B	$2.109B
YoY Change	69.85%	69.85%
TOTAL ASSETS
Total Short-Term Assets	$426.3M	$426.3M
Total Long-Term Assets	$2.109B	$2.109B
Total Assets	$2.535B	$2.535B
YoY Change	74.95%	74.95%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$116.8M	$116.8M
YoY Change	57.4%	57.4%
Accrued Expenses	$126.3M	$126.3M
YoY Change	39.25%	39.25%
Deferred Revenue	$31.47M
YoY Change	741.05%
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$35.78M	$35.78M
YoY Change	298.99%	298.99%
Total Short-Term Liabilities	$278.9M	$278.9M
YoY Change	57.01%	57.01%
LONG-TERM LIABILITIES
Long-Term Debt	$1.008B	$1.008B
YoY Change	72.25%	72.25%
Other Long-Term Liabilities	$37.33M	$227.2M
YoY Change	32.01%	20.66%
Total Long-Term Liabilities	$37.33M	$1.235B
YoY Change	32.01%	59.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$278.9M	$278.9M
Total Long-Term Liabilities	$37.33M	$1.235B
Total Liabilities	$316.2M	$1.514B
YoY Change	53.58%	59.11%
SHAREHOLDERS EQUITY
Retained Earnings	-$146.5M
YoY Change	-14.77%
Common Stock	$1.169B
YoY Change	76.62%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.022B	$1.022B
YoY Change
Total Liabilities & Shareholders Equity	$2.535B	$2.535B
YoY Change	74.95%	74.95%

Cashflow Statement

Concept	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	-$1.811M	$25.40M
YoY Change	-121.51%	-52.15%
Depreciation, Depletion And Amortization	$54.61M	$170.7M
YoY Change	64.25%	35.1%
Cash From Operating Activities	$75.29M	$233.1M
YoY Change	16.04%	7.26%
INVESTING ACTIVITIES
Capital Expenditures	$64.51M	$154.9M
YoY Change	49.0%	18.29%
Acquisitions		$851.8M
YoY Change		989.35%
Other Investing Activities	-$3.929M	-$850.7M
YoY Change	53.0%	1019.97%
Cash From Investing Activities	-$68.44M	-$1.006B
YoY Change	49.22%	386.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$496.2M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-7.696M	$922.3M
YoY Change	-283.41%	3322.41%
NET CHANGE
Cash From Operating Activities	75.29M	$233.1M
Cash From Investing Activities	-68.44M	-$1.006B
Cash From Financing Activities	-7.696M	$922.3M
Net Change In Cash	-840.0K	$149.8M
YoY Change	-103.62%	301.04%
FREE CASH FLOW
Cash From Operating Activities	$75.29M	$233.1M
Capital Expenditures	$64.51M	$154.9M
Free Cash Flow	$10.78M	$78.19M
YoY Change	-50.05%	-9.46%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2798000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1438000	usd
CY2023	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	12322000	usd
CY2022	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	11919000	usd
CY2023	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	7	business
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2585000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1313000	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-43382000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-20428000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-19614000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	74966000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	58046000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16946000	usd
CY2022	cwst	Business Acquisitions Pro Forma Operating Income Loss BusinessAcquisitionsProFormaOperatingIncomeLoss	113842000	usd
CY2023	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	28507000	usd
CY2022	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	60121000	usd
CY2021	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	36200000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51623000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51312000	shares
CY2021	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.71
CY2023Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#LongTermDebtAndCapitalLeaseObligations
CY2022Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#LongTermDebtAndCapitalLeaseObligations
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023	dei	Auditor Name AuditorName	RSM US LLP
CY2023	dei	Auditor Location AuditorLocation	Boston, Massachusetts
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	220912000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	71152000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4066000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4066000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3016000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	157324000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	100886000	usd
CY2023Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	3089000	usd
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	17223000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	15182000	usd
CY2023Q4	us-gaap	Inventory Gross InventoryGross	17859000	usd
CY2022Q4	us-gaap	Inventory Gross InventoryGross	13472000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	9918000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	6787000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	426325000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	207479000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1167541000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1064756000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	980553000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	720550000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	100844000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	92063000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	735670000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	274458000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	241429000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	91783000	usd
CY2023Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	2203000	usd
CY2022Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	1900000	usd
CY2023Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	10967000	usd
CY2022Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	10967000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	11224000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	22903000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	26255000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	27112000	usd
CY2023Q4	us-gaap	Assets Assets	2535470000	usd
CY2022Q4	us-gaap	Assets Assets	1449215000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	35781000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	8968000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	9039000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	7000000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	116794000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	74203000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22657000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	23556000	usd
CY2023Q4	us-gaap	Interest Payable Current InterestPayableCurrent	3886000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2858000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	31472000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	3742000	usd
CY2023Q4	us-gaap	Accrued Capping Closure Post Closure And Environmental Costs AccruedCappingClosurePostClosureAndEnvironmentalCosts	10773000	usd
CY2022Q4	us-gaap	Accrued Capping Closure Post Closure And Environmental Costs AccruedCappingClosurePostClosureAndEnvironmentalCosts	11036000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	48456000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	46237000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	278858000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	177600000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1007662000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	585015000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	66074000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	57345000	usd
CY2023Q4	us-gaap	Accrued Capping Closure Post Closure And Environmental Costs Noncurrent AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent	123131000	usd
CY2022Q4	us-gaap	Accrued Capping Closure Post Closure And Environmental Costs Noncurrent AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent	102642000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	627000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	437000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	37327000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	28276000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1168812000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	661761000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-146521000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-171920000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1080000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	7542000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1021791000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	497900000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2535470000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1449215000	usd
CY2023	us-gaap	Revenues Revenues	1264542000	usd
CY2022	us-gaap	Revenues Revenues	1085089000	usd
CY2021	us-gaap	Revenues Revenues	889211000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	832038000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	723117000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	582403000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	155847000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	133419000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	118834000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	170705000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	126351000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	103590000	usd
CY2022	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4613000	usd
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	5304000	usd
CY2021	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	usd
CY2023	cwst	Landfill Capping Charge LandfillCappingCharge	3870000	usd
CY2022	cwst	Landfill Capping Charge LandfillCappingCharge	0	usd
CY2021	cwst	Landfill Capping Charge LandfillCappingCharge	0	usd
CY2023	cwst	Landfill Closure Credit Charge Net LandfillClosureCreditChargeNet	467000	usd
CY2022	cwst	Landfill Closure Credit Charge Net LandfillClosureCreditChargeNet	1436000	usd
CY2021	cwst	Landfill Closure Credit Charge Net LandfillClosureCreditChargeNet	496000	usd
CY2023	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	0	usd
CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	759000	usd
CY2021	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	924000	usd
CY2023	us-gaap	Costs And Expenses CostsAndExpenses	1184115000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	989695000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	811551000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	80427000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	95394000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	77660000	usd
CY2023	us-gaap	Interest Income Other InterestIncomeOther	10741000	usd
CY2022	us-gaap	Interest Income Other InterestIncomeOther	709000	usd
CY2021	us-gaap	Interest Income Other InterestIncomeOther	302000	usd
CY2023	us-gaap	Interest Expense InterestExpense	47578000	usd
CY2022	us-gaap	Interest Expense InterestExpense	23722000	usd
CY2021	us-gaap	Interest Expense InterestExpense	21229000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-8191000	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1646000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2023	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	9885000	usd
CY2022	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	8008000	usd
CY2021	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	7324000	usd
CY2023	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2962000	usd
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55274000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51767000	shares
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.03
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2023	us-gaap	Net Income Loss NetIncomeLoss	25399000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	53079000	usd
CY2023	cwst	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Settlements Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossSettlementsBeforeReclassificationAndTax	6259000	usd
CY2022	cwst	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Settlements Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossSettlementsBeforeReclassificationAndTax	-1662000	usd
CY2021	cwst	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Settlements Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossSettlementsBeforeReclassificationAndTax	-4743000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	6361000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-1443000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-4763000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-13102000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	16959000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	8480000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-13204000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	16740000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	8500000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-4582000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	4095000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	2086000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8622000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	12645000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6414000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16777000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	65724000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	47514000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	362142000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1250000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11551000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	41100000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6414000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	422457000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1564000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8155000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	53079000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	12645000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	497900000	usd
CY2023	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	496231000	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1799000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9084000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	25399000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8622000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1021791000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	25399000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	53079000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	41100000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	170705000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	126351000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	103590000	usd
CY2023	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	465000000	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	88200000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	3701000	usd
CY2022	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1903000	usd
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2288000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	9084000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8155000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	11551000	usd
CY2023	us-gaap	Operating Lease Expense OperatingLeaseExpense	15318000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	13804000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	13827000	usd
CY2023	cwst	Loss Gain On Disposition Of Assets And Other Noncash Expense Income LossGainOnDispositionOfAssetsAndOtherNoncashExpenseIncome	708000	usd
CY2022	cwst	Loss Gain On Disposition Of Assets And Other Noncash Expense Income LossGainOnDispositionOfAssetsAndOtherNoncashExpenseIncome	737000	usd
CY2021	cwst	Loss Gain On Disposition Of Assets And Other Noncash Expense Income LossGainOnDispositionOfAssetsAndOtherNoncashExpenseIncome	1055000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-8191000	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2023	cwst	Landfill Capping Charge Noncash LandfillCappingChargeNoncash	3021000	usd
CY2022	cwst	Landfill Capping Charge Noncash LandfillCappingChargeNoncash	0	usd
CY2021	cwst	Landfill Capping Charge Noncash LandfillCappingChargeNoncash	0	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7392000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	16527000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15073000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	39436000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7101000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7422000	usd
CY2023	cwst	Increase Decrease In Landfill Operating Lease Contract Expenditures IncreaseDecreaseInLandfillOperatingLeaseContractExpenditures	-5496000	usd
CY2022	cwst	Increase Decrease In Landfill Operating Lease Contract Expenditures IncreaseDecreaseInLandfillOperatingLeaseContractExpenditures	-5486000	usd
CY2021	cwst	Increase Decrease In Landfill Operating Lease Contract Expenditures IncreaseDecreaseInLandfillOperatingLeaseContractExpenditures	-5655000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	41592000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	11075000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	13888000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	8172000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	11054000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6343000	usd
CY2023	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-8061000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1316000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-7539000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	233092000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	217314000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	182737000	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	851839000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	78197000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	170647000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	154907000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	130960000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	123295000	usd
CY2023	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	usd
CY2022	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	1637000	usd
CY2021	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	usd
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1110000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	600000	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	788000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1005636000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-206920000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-293154000	usd
CY2023	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	26257000	usd
CY2022	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	59211000	usd
CY2021	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	10305000	usd
CY2023	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	12759000	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1232000	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3684000	usd
CY2023	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	usd
CY2022	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	1000000	usd
CY2021	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	usd
CY2023	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	89000	usd
CY2022	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	192000	usd
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	172000	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	496231000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	922304000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	26949000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-10116000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	149760000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	37343000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	71152000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33809000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	21003000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	19025000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10109000	usd
CY2021	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	20753000	usd
CY2023Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	9	state
CY2023Q2	cwst	Number Of Wholly Owned Subsidiaries Acquired NumberOfWhollyOwnedSubsidiariesAcquired	4	subsidiary
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Management’s Estimates and Assumptions</span></div><div style="margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Preparation of our consolidated financial statements in accordance with GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the accounting for and recognition and disclosure of assets, liabilities, equity, revenues and expenses. We must make these estimates and assumptions because certain information that we use is dependent on future events, cannot be calculated with a high degree of precision given the available data or simply cannot be readily calculated. In some cases, these estimates are difficult to determine, and we must exercise significant judgment. In preparing our consolidated financial statements, the estimates and assumptions that we consider to be significant and that present the greatest amount of uncertainty relate to our accounting for landfills, environmental remediation liabilities, asset impairments, if applicable, goodwill recoverability assessment, accounts receivable valuation allowance for credit losses, self-insurance reserves, deferred taxes and uncertain tax positions, estimates of the fair values of assets acquired and liabilities assumed in any acquisition, contingent liabilities and stock-based compensation. Each of these items is discussed in more detail elsewhere in these notes to the consolidated financial statements, as applicable. Actual results may differ materially from the estimates and assumptions that we use in the preparation of our consolidated financial statements.</span></div>
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentrations of Credit Risk</span></div><div style="margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that potentially subject us to concentrations of credit risk consist of cash and cash equivalents, restricted investment securities, accounts receivable and derivative instruments. We maintain cash and cash equivalents and restricted investment securities with banks that at times exceed applicable insurance limits. We reduce our exposure to credit risk by maintaining such deposits with high quality financial institutions. Our concentration of credit risk with respect to accounts receivable is limited because of the large number and diversity of customers we serve, thus reducing the credit risk associated with any one customer group. As of December 31, 2023, no single customer or customer group represented greater than 5% of total accounts receivable. We manage credit risk through credit evaluations, credit limits, and monitoring procedures, but generally do not require collateral to support accounts receivable. We reduce our exposure to credit risk associated with derivative instruments by entering into agreements with high quality financial institutions and by evaluating and regularly monitoring their creditworthiness.</span></div>
CY2023	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	643000	usd
CY2022	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	330000	usd
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	718000	usd
CY2023	cwst	Closureand Post Closure Costs Incurrence Period ClosureandPostClosureCostsIncurrencePeriod	P30Y
CY2023	cwst	Inflation Rate InflationRate	0.024
CY2023	cwst	Numberof Landfill Operationand Management Agreements Entered Into NumberofLandfillOperationandManagementAgreementsEnteredInto	3	agreement
CY2023Q4	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P10Y
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	usd
CY2023Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	10967000	usd
CY2022Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	10967000	usd
CY2023	cwst	Liability For Claims And Claims Adjustment Expense Workers Compensation Maximum Exposure LiabilityForClaimsAndClaimsAdjustmentExpenseWorkersCompensationMaximumExposure	1250000	usd
CY2023Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	22427000	usd
CY2022Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	22184000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Gross Current ContractWithCustomerAssetGrossCurrent	158931000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Gross Current ContractWithCustomerAssetGrossCurrent	102234000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	31472000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	3742000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2022	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2021	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1264542000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1264542000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1085089000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1085089000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	889211000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	889211000	usd
CY2022	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	14	business
CY2021	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	10	business
CY2023	cwst	Business Combination Consideration Transferred Adjustment Open Working Capital Settlements BusinessCombinationConsiderationTransferredAdjustmentOpenWorkingCapitalSettlements	2873000	usd
CY2022	cwst	Business Combination Consideration Transferred Adjustment Open Working Capital Settlements BusinessCombinationConsiderationTransferredAdjustmentOpenWorkingCapitalSettlements	0	usd
CY2021	cwst	Business Combination Consideration Transferred Adjustment Open Working Capital Settlements BusinessCombinationConsiderationTransferredAdjustmentOpenWorkingCapitalSettlements	0	usd
CY2023	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1436871000	usd
CY2023	cwst	Business Acquisitions Pro Forma Operating Income Loss BusinessAcquisitionsProFormaOperatingIncomeLoss	89236000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55174000	shares
CY2023	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.52
CY2022	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.16
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55274000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51767000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51515000	shares
CY2023	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.52
CY2022	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.16
CY2021	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.70
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3016000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3276000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2333000	usd
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2468000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1893000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1896000	usd
CY2023	cwst	Accounts Receivable Allowance For Credit Loss Write Off Recoveries AccountsReceivableAllowanceForCreditLossWriteOffRecoveries	1418000	usd
CY2022	cwst	Accounts Receivable Allowance For Credit Loss Write Off Recoveries AccountsReceivableAllowanceForCreditLossWriteOffRecoveries	2153000	usd
CY2021	cwst	Accounts Receivable Allowance For Credit Loss Write Off Recoveries AccountsReceivableAllowanceForCreditLossWriteOffRecoveries	953000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4066000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4066000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3016000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3276000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	101770000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	90362000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	2148094000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	1785306000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1167541000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1064756000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	980553000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	720550000	usd
CY2023	us-gaap	Depreciation Depreciation	99249000	usd
CY2022	us-gaap	Depreciation Depreciation	78139000	usd
CY2021	us-gaap	Depreciation Depreciation	62342000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	7383000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	6339000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1840000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1638000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	15318000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	13804000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5313000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3884000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	604000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	522000	usd
CY2023	us-gaap	Lease Cost LeaseCost	30458000	usd
CY2022	us-gaap	Lease Cost LeaseCost	26187000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8981000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7847000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	10578000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	10009000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	12211000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	11919000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	19796000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	9835000	usd
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P4Y10M24D
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y10M24D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.047
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	12293000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	12432000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	12586000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	12230000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	11098000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	11628000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	12423000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	7648000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7790000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	6985000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	39230000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	8900000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	95420000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	59823000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	20307000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	6757000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	75113000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	53066000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	274458000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	461159000	usd
CY2023	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	53000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	735670000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	232860000	usd
CY2022	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	40707000	usd
CY2022	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	891000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	274458000	usd
CY2022	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	18415000	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	9529000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	7565000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	11801000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	347469000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	106040000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	241429000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	166785000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	75002000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	91783000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	31037000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	16593000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10953000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	47387000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	43388000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	38645000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	34149000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	29166000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	48694000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	113678000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	86914000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5447000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	4857000	usd
CY2023	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	14030000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1383000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6087000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3868000	usd
CY2023	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2962000	usd
CY2022	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1903000	usd
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2288000	usd
CY2023	cwst	Letters Of Credit Fees LettersOfCreditFees	423000	usd
CY2022	cwst	Letters Of Credit Fees LettersOfCreditFees	458000	usd
CY2021	cwst	Letters Of Credit Fees LettersOfCreditFees	458000	usd
CY2023	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	643000	usd
CY2022	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	330000	usd
CY2021	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	718000	usd
CY2023	us-gaap	Interest Expense InterestExpense	47578000	usd
CY2022	us-gaap	Interest Expense InterestExpense	23722000	usd
CY2021	us-gaap	Interest Expense InterestExpense	21229000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	35781000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	66455000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	724288000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	6965000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	6566000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	214491000	usd
CY2023Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	1054546000	usd
CY2023Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	6275000	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	912000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1425000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-388000	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-312000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	282000	usd
CY2022Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	6335000	usd
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	5887000	usd
CY2023	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	546000	usd
CY2022	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	415000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	5889000	usd
CY2022Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	6335000	usd
CY2022	cwst	Environmental Loss Contingency Current Statement Of Financial Position Extensible Enumeration Not Disclosed Flag EnvironmentalLossContingencyCurrentStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	Less: current portion
CY2023	cwst	Environmental Loss Contingency Current Statement Of Financial Position Extensible Enumeration Not Disclosed Flag EnvironmentalLossContingencyCurrentStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	Less: current portion
CY2023Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	1662000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	814000	usd
CY2022	cwst	Environmental Loss Contingency Noncurrent Statement Of Financial Position Extensible Enumeration Not Disclosed Flag EnvironmentalLossContingencyNoncurrentStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	Long-term portion
CY2023	cwst	Environmental Loss Contingency Noncurrent Statement Of Financial Position Extensible Enumeration Not Disclosed Flag EnvironmentalLossContingencyNoncurrentStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	Long-term portion
CY2023Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	4227000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	5521000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due Within One Year AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear	1499000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Second Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear	308000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Third Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear	318000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fourth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear	299000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear	306000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due After Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear	3704000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	6434000	usd
CY2023	cwst	Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	consolidated balance sheet
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	6434000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Discount AccrualForEnvironmentalLossContingenciesDiscount	545000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	5889000	usd
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	944000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	74000	usd
CY2023	cwst	Effective Income Tax Rate Reconciliation Nondeductible Expense Officer Compensation EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficerCompensation	996000	usd
CY2022	cwst	Effective Income Tax Rate Reconciliation Nondeductible Expense Officer Compensation EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficerCompensation	1300000	usd
CY2021	cwst	Effective Income Tax Rate Reconciliation Nondeductible Expense Officer Compensation EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficerCompensation	1338000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	809000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	129000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	55.60
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	18000	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	79.72
CY2023	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	18000	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	4.88
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	129000	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	66.03
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y6M
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2504000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	49000	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	40.60
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y2M12D
CY2023Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	2177000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.300
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	12048000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	17011000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	20106000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2330000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1744000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2304000	usd
CY2023	cwst	Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag DerivativeAssetStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	Interest rate swaps
CY2022	cwst	Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag DerivativeAssetStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	Interest rate swaps
CY2023	us-gaap	Deferred Compensation Arrangement With Individual Requisite Service Period1 DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1	P2Y
CY2023	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4371000	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3558000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2811000	usd
CY2019	cwst	Multiemployer Plans Withdrawal Obligation Contingent Liability Term MultiemployerPlansWithdrawalObligationContingentLiabilityTerm	P17Y
CY2019Q4	cwst	Multiemployer Plans Withdrawal Obligation Undiscounted MultiemployerPlansWithdrawalObligationUndiscounted	4224000	usd
CY2019Q4	cwst	Multiemployer Plans Complete Withdrawal Estimated Accumulated Benefit Obligation MultiemployerPlansCompleteWithdrawalEstimatedAccumulatedBenefitObligation	18511000	usd
CY2023Q4	us-gaap	Multiemployer Plans Withdrawal Obligation MultiemployerPlansWithdrawalObligation	1496000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	782000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	322000	usd
CY2023	cwst	Effective Income Tax Rate Reconciliation Deductible Stock Awards EffectiveIncomeTaxRateReconciliationDeductibleStockAwards	963000	usd
CY2022	cwst	Effective Income Tax Rate Reconciliation Deductible Stock Awards EffectiveIncomeTaxRateReconciliationDeductibleStockAwards	627000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	8155000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15645000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	12356000	usd
CY2023	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	8155000	usd
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	15645000	usd
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	12356000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4385000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5362000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1873000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-894000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	880000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2717000	usd
CY2023	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	3491000	usd
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	6242000	usd
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	4590000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11646000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21887000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16946000	usd
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$CWST
CASELLA WASTE SYSTEMS INC Stock $cwst

2023 Q4 Form 10-K Financial Statement

#000091117724000005 Filed on February 16, 2024

Income Statement

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Facts In Submission

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$CWST CASELLA WASTE SYSTEMS INC Stock $cwst

2023 Q4 Form 10-K Financial Statement

#000091117724000005 Filed on February 16, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWST
CASELLA WASTE SYSTEMS INC Stock $cwst