$MSEX
MIDDLESEX WATER CO Stock $msex

$msex Overview Financials Valuation SEC Filings Company Website

2023 Q4 Form 10-Q Financial Statement

#000117494723001376 Filed on November 09, 2023

Income Statement

Concept	2023 Q4	2023 Q3
Revenue	$38.60M	$46.69M
YoY Change	-0.57%	-2.11%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$6.648M	$6.376M
YoY Change	-9.43%	9.67%
% of Gross Profit
Operating Expenses	$30.36M	$33.89M
YoY Change	-1.03%	8.78%
Operating Profit	$8.242M	$12.82M
YoY Change	1.17%	-22.64%
Interest Expense	-$3.779M	$3.518M
YoY Change	35.3%	49.38%
% of Operating Profit	-45.85%	27.44%
Other Income/Expense, Net	$1.201M	$1.432M
YoY Change	-0.25%	-29.77%
Pretax Income	$5.665M	$10.74M
YoY Change	-22.6%	-33.97%
Income Tax	-$102.0K	$746.0K
% Of Pretax Income	-1.8%	6.95%
Net Earnings	$5.765M	$9.990M
YoY Change	-19.58%	-30.1%
Net Earnings / Revenue	14.93%	21.4%
Basic Earnings Per Share	$0.32	$0.56
Diluted Earnings Per Share	$0.32	$0.56
COMMON SHARES
Basic Shares Outstanding	17.81M shares	17.75M shares
Diluted Shares Outstanding		17.87M shares

Balance Sheet

Concept	2023 Q4	2023 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.390M	$3.000M
YoY Change	-37.57%	3.16%
Cash & Equivalents	$2.390M	$2.970M
Short-Term Investments
Other Short-Term Assets	$11.13M	$14.20M
YoY Change	-1.36%	-3.34%
Inventory	$6.972M	$6.400M
Prepaid Expenses	$1.833M	$2.918M
Receivables	$18.17M	$18.99M
Other Receivables	$69.87M	$93.20M
Total Short-Term Assets	$108.5M	$135.8M
YoY Change	190.93%	227.36%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.013B	$1.000B
YoY Change	8.28%	9.32%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$62.00K	$51.00K
YoY Change	226.32%	-51.43%
Total Long-Term Assets	$1.128B	$1.108B
YoY Change	8.71%	8.25%
TOTAL ASSETS
Total Short-Term Assets	$108.5M	$135.8M
Total Long-Term Assets	$1.128B	$1.108B
Total Assets	$1.236B	$1.243B
YoY Change	15.04%	16.79%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$27.62M	$28.60M
YoY Change	11.15%	10.56%
Accrued Expenses	$3.138M	$3.100M
YoY Change	-3.0%	7.86%
Deferred Revenue	$1.390M
YoY Change
Short-Term Debt	$42.80M	$42.30M
YoY Change	-22.88%	4.44%
Long-Term Debt Due	$7.740M	$7.444M
YoY Change	-55.68%	-1.63%
Total Short-Term Liabilities	$103.8M	$121.3M
YoY Change	-11.9%	30.48%
LONG-TERM LIABILITIES
Long-Term Debt	$358.2M	$354.3M
YoY Change	23.38%	17.61%
Other Long-Term Liabilities	$592.0K	$681.0K
YoY Change	-35.58%	-32.17%
Total Long-Term Liabilities	$358.7M	$355.0M
YoY Change	23.2%	17.44%
TOTAL LIABILITIES
Total Short-Term Liabilities	$103.8M	$121.3M
Total Long-Term Liabilities	$358.7M	$355.0M
Total Liabilities	$462.6M	$476.3M
YoY Change	13.08%	20.51%
SHAREHOLDERS EQUITY
Retained Earnings	$176.2M	$176.3M
YoY Change	5.35%	6.45%
Common Stock	$246.8M	$243.3M
YoY Change	5.88%	4.66%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$423.0M	$419.6M
YoY Change
Total Liabilities & Shareholders Equity	$1.236B	$1.243B
YoY Change	15.04%	16.79%

Cashflow Statement

Concept	2023 Q4	2023 Q3
OPERATING ACTIVITIES
Net Income	$5.765M	$9.990M
YoY Change	-19.58%	-30.1%
Depreciation, Depletion And Amortization	$6.648M	$6.376M
YoY Change	-9.43%	9.67%
Cash From Operating Activities	$12.79M	$10.70M
YoY Change	-25.28%	-38.43%
INVESTING ACTIVITIES
Capital Expenditures	$17.11M	$22.43M
YoY Change	-32.63%	-15.66%
Acquisitions
YoY Change
Other Investing Activities		$0.00
YoY Change
Cash From Investing Activities	-$17.11M	-$22.43M
YoY Change	-32.63%	-15.66%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	3.729M	10.33M
YoY Change	-59.45%	32.37%
NET CHANGE
Cash From Operating Activities	12.79M	10.70M
Cash From Investing Activities	-17.11M	-22.43M
Cash From Financing Activities	3.729M	10.33M
Net Change In Cash	-588.0K	-1.400M
YoY Change	-163.91%	-0.85%
FREE CASH FLOW
Cash From Operating Activities	$12.79M	$10.70M
Capital Expenditures	$17.11M	$22.43M
Free Cash Flow	-$4.317M	-$11.73M
YoY Change	-47.84%	27.28%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1		usd
CY2022	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1		usd
CY2023Q3	msex	Preferred Shares Authorized PreferredSharesAuthorized		usd
CY2023Q3	msex	Preferred Stock Value1 PreferredStockValue1		usd
CY2022Q4	msex	Preferred Stock Value1 PreferredStockValue1		usd
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2023-09-30
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	0-422
	dei	Entity Registrant Name EntityRegistrantName	MIDDLESEX WATER COMPANY
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-1114430
	dei	Entity Address Address Line1 EntityAddressAddressLine1	485C Route One South
	dei	Entity Address City Or Town EntityAddressCityOrTown	Iselin
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	08830
	dei	City Area Code CityAreaCode	(732)
	dei	Local Phone Number LocalPhoneNumber	634-1500
	dei	Security12b Title Security12bTitle	Common Stock
	dei	Trading Symbol TradingSymbol	MSEX
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2023Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17806696	shares
CY2023Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	46715000	usd
CY2022Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	47732000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	127672000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	123611000	usd
CY2023Q3	msex	Operations And Maintenance OperationsAndMaintenance	22581000	usd
CY2022Q3	msex	Operations And Maintenance OperationsAndMaintenance	20312000	usd
	msex	Operations And Maintenance OperationsAndMaintenance	64042000	usd
	msex	Operations And Maintenance OperationsAndMaintenance	59007000	usd
CY2023Q3	us-gaap	Depreciation Depreciation	6376000	usd
CY2022Q3	us-gaap	Depreciation Depreciation	5814000	usd
	us-gaap	Depreciation Depreciation	18546000	usd
	us-gaap	Depreciation Depreciation	17107000	usd
CY2023Q3	us-gaap	Taxes Other TaxesOther	4936000	usd
CY2022Q3	us-gaap	Taxes Other TaxesOther	5031000	usd
	us-gaap	Taxes Other TaxesOther	14104000	usd
	us-gaap	Taxes Other TaxesOther	13543000	usd
CY2023Q3	us-gaap	Operating Expenses OperatingExpenses	33893000	usd
CY2022Q3	us-gaap	Operating Expenses OperatingExpenses	31157000	usd
	us-gaap	Operating Expenses OperatingExpenses	96692000	usd
	us-gaap	Operating Expenses OperatingExpenses	89657000	usd
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	5232000	usd
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12822000	usd
CY2022Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	16575000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	30980000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	39186000	usd
CY2023Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	496000	usd
CY2022Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	627000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	2162000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1553000	usd
CY2023Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	936000	usd
CY2022Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1412000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3124000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4185000	usd
CY2023Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1432000	usd
CY2022Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2039000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5286000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5738000	usd
CY2023Q3	us-gaap	Interest Expense InterestExpense	3518000	usd
CY2022Q3	us-gaap	Interest Expense InterestExpense	2355000	usd
	us-gaap	Interest Expense InterestExpense	9364000	usd
	us-gaap	Interest Expense InterestExpense	6574000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10736000	usd
CY2022Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16259000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	26902000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	38350000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	746000	usd
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1968000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1143000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3092000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	9990000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	14291000	usd
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
	us-gaap	Net Income Loss NetIncomeLoss	35258000	usd
CY2023Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
CY2022Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	90000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	90000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9960000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	14261000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	25669000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	35168000	usd
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.8
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.44
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.99
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17758000	shares
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17628000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17708000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17583000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17873000	shares
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17743000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17823000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17698000	shares
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	299187000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	249153000	usd
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	784194000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	735138000	usd
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	99933000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	97581000	usd
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	32308000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	53570000	usd
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1215622000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1135442000	usd
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	230124000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	214891000	usd
CY2023Q3	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	985498000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	920551000	usd
CY2023Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2970000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3828000	usd
CY2023Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2055000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2326000	usd
CY2023Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	18990000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	16018000	usd
CY2023Q3	msex	Litigation Settlements Receivable LitigationSettlementsReceivable	93163000	usd
CY2023Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	11316000	usd
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	8659000	usd
CY2023Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	6405000	usd
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	6177000	usd
CY2023Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2918000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2624000	usd
CY2023Q3	us-gaap	Assets Current AssetsCurrent	135762000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	37306000	usd
CY2023Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3338000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3826000	usd
CY2023Q3	msex	Preliminary Survey And Investigation Charges PreliminarySurveyAndInvestigationCharges	2372000	usd
CY2022Q4	msex	Preliminary Survey And Investigation Charges PreliminarySurveyAndInvestigationCharges	2806000	usd
CY2023Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	94485000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	90046000	usd
CY2023Q3	msex	Non Utility Assets Net NonUtilityAssetsNet	11383000	usd
CY2022Q4	msex	Non Utility Assets Net NonUtilityAssetsNet	11207000	usd
CY2023Q3	msex	Employee Benefit Plans EmployeeBenefitPlans	10527000	usd
CY2022Q4	msex	Employee Benefit Plans EmployeeBenefitPlans	8689000	usd
CY2023Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	51000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	19000	usd
CY2023Q3	us-gaap	Other Assets OtherAssets	122156000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	116593000	usd
CY2023Q3	us-gaap	Assets Assets	1243416000	usd
CY2022Q4	us-gaap	Assets Assets	1074450000	usd
CY2023Q3	us-gaap	Common Stock Value CommonStockValue	243250000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	233054000	usd
CY2023Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	176333000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	167274000	usd
CY2023Q3	msex	Total Common Equity TotalCommonEquity	419583000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2023Q3	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2023Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	354276000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	290280000	usd
CY2023Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	775943000	usd
CY2022Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	692692000	usd
CY2023Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	7444000	usd
CY2022Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	17462000	usd
CY2023Q3	us-gaap	Notes Payable Current NotesPayableCurrent	42250000	usd
CY2022Q4	us-gaap	Notes Payable Current NotesPayableCurrent	55500000	usd
CY2023Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	28604000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	24847000	usd
CY2023Q3	msex	Litigation Settlement Payable LitigationSettlementPayable	27949000	usd
CY2023Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	8143000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12162000	usd
CY2023Q3	us-gaap	Interest Payable Current InterestPayableCurrent	2546000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2535000	usd
CY2023Q3	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	1459000	usd
CY2022Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	1365000	usd
CY2023Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	2908000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3988000	usd
CY2023Q3	us-gaap	Liabilities Current LiabilitiesCurrent	121303000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	117859000	usd
CY2023Q3	msex	Construction Advances ConstructionAdvances	21464000	usd
CY2022Q4	msex	Construction Advances ConstructionAdvances	21382000	usd
CY2023Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3221000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3706000	usd
CY2023Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	87763000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	77783000	usd
CY2023Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	112815000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	46734000	usd
CY2023Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	681000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	919000	usd
CY2023Q3	us-gaap	Other Liabilities OtherLiabilities	225944000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	150524000	usd
CY2023Q3	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	120226000	usd
CY2022Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	113375000	usd
CY2023Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1243416000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1074450000	usd
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
	us-gaap	Net Income Loss NetIncomeLoss	35258000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	22106000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20135000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4685000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4312000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1300000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	914000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	144000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-474000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1790000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1270000	usd
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	5232000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2972000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2770000	usd
	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	2657000	usd
	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	3749000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	228000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	434000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	294000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	789000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3757000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4748000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-4019000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	3964000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	11000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	188000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1487000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1973000	usd
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	94000	usd
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	146000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-4255000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1769000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	39986000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	44241000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	862000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	639000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	73074000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	65939000	usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3122000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-73074000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-62817000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16460000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	6397000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	70640000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2663000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-13250000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	27500000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	123000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	612000	usd
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	10000	usd
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	25000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	619000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	9025000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	10064000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16600000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15298000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	90000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	90000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-283000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	146000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	32230000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	17951000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-858000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-625000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3828000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3533000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2970000	usd
CY2022Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2908000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	5954000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	5705000	usd
	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary	2100000	usd
	msex	Litigation Settlement Receivable LitigationSettlementReceivable	93163000	usd
CY2023Q3	msex	Litigation Settlement Payable LitigationSettlementPayable	27949000	usd
	us-gaap	Interest Paid Net InterestPaidNet	9589000	usd
	us-gaap	Interest Paid Net InterestPaidNet	6793000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	862000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	639000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2716000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2125000	usd
CY2023Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000	shares
CY2023Q3	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	17771	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	17642	shares
	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	243250000	usd
CY2022	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	233054000	usd
CY2023Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	176333000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	167274000	usd
CY2023Q3	msex	Total Common Equity TotalCommonEquity	419583000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2023Q3	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2022Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2023Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20	shares
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2022	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2023Q3	us-gaap	Long Term Debt LongTermDebt	360567000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	306387000	usd
CY2023Q3	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	6577000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	6873000	usd
CY2023Q3	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	5424000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	5518000	usd
CY2023Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	7444000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	17462000	usd
CY2023Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	354276000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	290280000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	385567000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	14291000	usd
CY2022Q3	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3025000	usd
CY2022Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	361000	usd
CY2022Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5114000	usd
CY2022Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2022Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	25000	usd
CY2022Q3	us-gaap	Stockholders Equity StockholdersEquity	398075000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	367726000	usd
	us-gaap	Net Income Loss NetIncomeLoss	35258000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	10064000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	160000	usd
	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	280000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15298000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	90000	usd
	us-gaap	Stockholders Equity Other StockholdersEquityOther	25000	usd
CY2022Q3	us-gaap	Stockholders Equity StockholdersEquity	398075000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	411477000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	9990000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3281000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	424000	usd
CY2023Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5549000	usd
CY2023Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2023Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	10000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	419583000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	400328000	usd
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	9025000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	811000	usd
	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	360000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16600000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	90000	usd
	us-gaap	Stockholders Equity Other StockholdersEquityOther	10000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	419583000	usd
	msex	Obligation To Pay Percentage ObligationToPayPercentage	0.30	pure
	us-gaap	Proceeds From Fees Received ProceedsFromFeesReceived	27900000	usd
	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	65200000	usd
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	118501	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9000000	usd
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1000000	shares
CY2023Q1	msex	Percentage Of Discount Purchase Of Common Stock In Investment Plan PercentageOfDiscountPurchaseOfCommonStockInInvestmentPlan	0.03	pure
CY2023Q1	msex	Number Of Shares Offering For Discount NumberOfSharesOfferingForDiscount	200000	shares
CY2023Q2	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	700000	shares
CY2023Q2	msex	Borrowed Loan BorrowedLoan	20000000	usd
CY2023Q2	msex	Maturity Date MaturityDate	2033
CY2021Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	1000000	usd
CY2023Q3	msex	Maturity Date MaturityDate	2043
	msex	Carrying Amount CarryingAmount	133374000	usd
CY2023Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	123235000	usd
CY2022	msex	Carrying Amount CarryingAmount	147269000	usd
CY2022Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	138756000	usd
CY2023Q3	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	227200000	usd
CY2022Q4	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	159100000	usd
CY2023Q3	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21500000	usd
CY2022Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21400000	usd
CY2023Q3	us-gaap	Preferred Stock Convertible Conversion Price PreferredStockConvertibleConversionPrice	7
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	pure
CY2023Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	46715000	usd
CY2022Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	47732000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	127672000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	123611000	usd
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12822000	usd
CY2022Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	16575000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	30980000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	39186000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	9990000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	14291000	usd
	us-gaap	Profit Loss ProfitLoss	25759000	usd
	us-gaap	Profit Loss ProfitLoss	35258000	usd
CY2023Q3	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	22439000	usd
CY2022Q3	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26596000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	73074000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	65939000	usd
CY2023Q3	us-gaap	Assets Assets	1243416000	usd
CY2022Q4	us-gaap	Assets Assets	1074450000	usd
CY2023Q3	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	140000000	usd
CY2023Q3	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	42300000	usd
CY2023Q3	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	97700000	usd
CY2023Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	140000000	usd
CY2022	msex	Operating Lease Accumulated Amortization OperatingLeaseAccumulatedAmortization	3500000	usd
CY2023Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3300000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3800000	usd
	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	9541000	usd
CY2023Q3	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	25015000	usd
CY2022Q3	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	33750000	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	32860000	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	22648000	usd
CY2023Q3	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0637	pure
CY2022Q3	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0334	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0589	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0248	pure
CY2023Q3	us-gaap	Line Of Credit Facility Fair Value Of Amount Outstanding LineOfCreditFacilityFairValueOfAmountOutstanding	42300000	usd
CY2023Q3	msex	Cost Of Treated Water CostOfTreatedWater	1607000	usd
CY2022Q3	msex	Cost Of Treated Water CostOfTreatedWater	936000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	4353000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	2467000	usd
CY2023Q3	msex	Cost Of Untreated Water CostOfUntreatedWater	812000	usd
CY2022Q3	msex	Cost Of Untreated Water CostOfUntreatedWater	835000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	2352000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	2384000	usd
CY2023Q3	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	2419000	usd
CY2022Q3	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	1771000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	6705000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	4851000	usd
CY2023Q3	msex	Estimated Incremental Borrowing Rate EstimatedIncrementalBorrowingRate	0.0403	pure
CY2023Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
CY2022Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	600000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	600000	usd
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	7300000	usd
CY2022	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	7300000	usd
	msex	Operating Lease Accumulated Amortization OperatingLeaseAccumulatedAmortization	4000000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	200000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	800000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	800000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	900000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	900000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1800000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	5400000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1600000	usd
CY2023Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	3800000	usd
CY2023Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3200000	usd
	msex	Budgeted Construction Cost BudgetedConstructionCost	96000000	usd
	msex	Estimatedobligationexpenditure Estimatedobligationexpenditure	8000000	usd
CY2023Q3	msex	Residential Operating Revenues ResidentialOperatingRevenues	25070000	usd
CY2022Q3	msex	Residential Operating Revenues ResidentialOperatingRevenues	25108000	usd
	msex	Residential Operating Revenues ResidentialOperatingRevenues	66726000	usd
	msex	Residential Operating Revenues ResidentialOperatingRevenues	65767000	usd
CY2023Q3	msex	Commercial Operating Revenues CommercialOperatingRevenues	6926000	usd
CY2022Q3	msex	Commercial Operating Revenues CommercialOperatingRevenues	7167000	usd
	msex	Commercial Operating Revenues CommercialOperatingRevenues	18553000	usd
	msex	Commercial Operating Revenues CommercialOperatingRevenues	16796000	usd
CY2023Q3	msex	Industrial Operating Revenues IndustrialOperatingRevenues	3396000	usd
CY2022Q3	msex	Industrial Operating Revenues IndustrialOperatingRevenues	3208000	usd
	msex	Industrial Operating Revenues IndustrialOperatingRevenues	9041000	usd
	msex	Industrial Operating Revenues IndustrialOperatingRevenues	8504000	usd
CY2023Q3	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	3203000	usd
CY2022Q3	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	3248000	usd
	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	9453000	usd
CY2023Q3	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	4958000	usd
CY2022Q3	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	5644000	usd
	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	14479000	usd
	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	13905000	usd
CY2023Q3	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	3137000	usd
CY2022Q3	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	3321000	usd
	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	9309000	usd
	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	8986000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	46690000	usd
CY2022Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	47696000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	127561000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	123499000	usd
CY2023Q3	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	210000	usd
CY2022Q3	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	486000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	373000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	709000	usd
CY2023Q3	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	114000	usd
CY2022Q3	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	110000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	340000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	330000	usd
CY2023Q3	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-299000	usd
CY2022Q3	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-560000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-602000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-927000	usd
CY2023Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	46715000	usd
CY2022Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	47732000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	127672000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	123611000	usd
CY2023Q3	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q3	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q3	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023Q3	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary		usd
CY2022Q4	msex	Litigation Settlements Receivable LitigationSettlementsReceivable		usd
CY2022Q4	msex	Litigation Settlement Payable LitigationSettlementPayable		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary		usd
	msex	Litigation Settlement Receivable LitigationSettlementReceivable		usd
CY2022Q3	msex	Litigation Settlement Payable LitigationSettlementPayable		usd
CY2022Q4	msex	Preferred Shares Authorized PreferredSharesAuthorized		usd
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Central Index Key EntityCentralIndexKey	0000066004

Files In Submission

Name	View Source	Status
0001174947-23-001376-index-headers.html	Edgar Link	pending
0001174947-23-001376-index.html	Edgar Link	pending
msex-20230930_def.xml	Edgar Link	unprocessable
msex-20230930_pre.xml	Edgar Link	unprocessable
0001174947-23-001376.txt	Edgar Link	pending
0001174947-23-001376-xbrl.zip	Edgar Link	pending
ex10-17c.htm	Edgar Link	pending
ex10-17d.htm	Edgar Link	pending
ex10-53.htm	Edgar Link	pending
ex10-54.htm	Edgar Link	pending
ex10-55.htm	Edgar Link	pending
ex31-1.htm	Edgar Link	pending
ex31-2.htm	Edgar Link	pending
ex32-1.htm	Edgar Link	pending
ex32-2.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
msex-20230930.htm	Edgar Link	pending
msex-20230930.xsd	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R12.htm	Edgar Link	pending
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R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
msex-20230930_htm.xml	Edgar Link	completed
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
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R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
msex-20230930_cal.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
msex-20230930_lab.xml	Edgar Link	unprocessable

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$MSEX
MIDDLESEX WATER CO Stock $msex

2023 Q4 Form 10-Q Financial Statement

#000117494723001376 Filed on November 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX MIDDLESEX WATER CO Stock $msex

2023 Q4 Form 10-Q Financial Statement

#000117494723001376 Filed on November 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX
MIDDLESEX WATER CO Stock $msex