$MSEX
MIDDLESEX WATER CO Stock $msex

$msex Overview Financials Valuation SEC Filings Company Website

2024 Q3 Form 10-Q Financial Statement

#000117494724000934 Filed on July 31, 2024

Income Statement

Concept	2024 Q3	2024 Q2	2023 Q4
Revenue	$55.07M	$49.12M	$38.60M
YoY Change	17.95%	14.75%	-0.57%
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	$6.309M	$6.305M	$6.648M
YoY Change	-1.05%	-14.12%	-9.43%
% of Gross Profit
Operating Expenses	$37.60M	$33.83M	$30.36M
YoY Change	10.93%	5.29%	-1.03%
Operating Profit	$17.50M	$15.32M	$8.242M
YoY Change	36.49%	43.55%	1.17%
Interest Expense	$3.411M	$4.041M	-$3.779M
YoY Change	-3.04%	-224.3%	35.3%
% of Operating Profit	19.49%	26.39%	-45.85%
Other Income/Expense, Net	$1.968M	$2.656M	$1.201M
YoY Change	37.43%	105.89%	-0.25%
Pretax Income	$16.06M	$13.93M	$5.665M
YoY Change	49.57%	45.71%	-22.6%
Income Tax	$1.739M	$3.384M	-$102.0K
% Of Pretax Income	10.83%	24.29%	-1.8%
Net Earnings	$14.32M	$10.55M	$5.765M
YoY Change	43.33%	6.84%	-19.58%
Net Earnings / Revenue	26.0%	21.47%	14.93%
Basic Earnings Per Share	$0.80	$0.59	$0.32
Diluted Earnings Per Share	$0.80	$0.59	$0.32
COMMON SHARES
Basic Shares Outstanding	17.83M shares	17.83M shares	17.81M shares
Diluted Shares Outstanding	17.95M shares	17.94M shares

Balance Sheet

Concept	2024 Q3	2024 Q2	2023 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.344M	$8.025M	$2.390M
YoY Change	111.47%	83.34%	-37.57%
Cash & Equivalents	$6.344M	$8.025M	$2.390M
Short-Term Investments
Other Short-Term Assets	$16.55M	$16.45M	$11.13M
YoY Change	16.54%	13.19%	-1.36%
Inventory	$6.550M	$6.477M	$6.972M
Prepaid Expenses	$3.131M	$3.925M	$1.833M
Receivables	$22.70M	$20.17M	$18.17M
Other Receivables	$0.00	$69.87M	$69.87M
Total Short-Term Assets	$52.15M	$121.0M	$108.5M
YoY Change	-61.59%	198.25%	190.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.052B	$1.035B	$1.013B
YoY Change	5.21%	5.37%	8.28%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$125.2M	$51.00K	$62.00K
YoY Change	245333.33%	-99.95%	226.32%
Total Long-Term Assets	$1.177B	$1.154B	$1.128B
YoY Change	6.3%	6.13%	8.71%
TOTAL ASSETS
Total Short-Term Assets	$52.15M	$121.0M	$108.5M
Total Long-Term Assets	$1.177B	$1.154B	$1.128B
Total Assets	$1.230B	$1.275B	$1.236B
YoY Change	-1.11%	13.04%	15.04%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$32.36M	$25.22M	$27.62M
YoY Change	13.11%	-10.77%	11.15%
Accrued Expenses	$2.396M	$3.252M	$3.138M
YoY Change	-22.71%	-12.06%	-3.0%
Deferred Revenue	$1.555M	$1.689M	$1.390M
YoY Change
Short-Term Debt	$17.50M	$72.25M	$42.80M
YoY Change	-58.63%	207.45%	-22.88%
Long-Term Debt Due	$358.9M	$362.8M	$7.740M
YoY Change	4721.18%	1977.92%	-55.68%
Total Short-Term Liabilities	$79.91M	$135.0M	$103.8M
YoY Change	-34.12%	54.16%	-11.9%
LONG-TERM LIABILITIES
Long-Term Debt	$352.3M	$356.0M	$358.2M
YoY Change	-0.56%	1.58%	23.38%
Other Long-Term Liabilities	$437.0K	$420.0K	$592.0K
YoY Change	-35.83%	-99.78%	-35.58%
Total Long-Term Liabilities	$352.7M	$356.4M	$358.7M
YoY Change	-0.63%	-34.16%	23.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$79.91M	$135.0M	$103.8M
Total Long-Term Liabilities	$352.7M	$356.4M	$358.7M
Total Liabilities	$432.6M	$491.4M	$462.6M
YoY Change	-9.16%	-31.18%	13.08%
SHAREHOLDERS EQUITY
Retained Earnings	$194.4M	$185.9M	$176.2M
YoY Change	10.22%	8.1%	5.35%
Common Stock	$247.6M	$247.0M	$246.8M
YoY Change	1.78%	3.12%	5.88%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$441.9M	$432.9M	$423.0M
YoY Change
Total Liabilities & Shareholders Equity	$1.230B	$1.275B	$1.236B
YoY Change	-1.11%	13.04%	15.04%

Cashflow Statement

Concept	2024 Q3	2024 Q2	2023 Q4
OPERATING ACTIVITIES
Net Income	$14.32M	$10.55M	$5.765M
YoY Change	43.33%	6.84%	-19.58%
Depreciation, Depletion And Amortization	$6.309M	$6.305M	$6.648M
YoY Change	-1.05%	-14.12%	-9.43%
Cash From Operating Activities	$19.46M	$11.23M	$12.79M
YoY Change	81.83%	-15.69%	-25.28%
INVESTING ACTIVITIES
Capital Expenditures	$20.74M	$14.35M	$17.11M
YoY Change	-7.52%	-45.07%	-32.63%
Acquisitions
YoY Change
Other Investing Activities
YoY Change
Cash From Investing Activities	-$20.74M	-$14.35M	-$17.11M
YoY Change	-7.52%	-45.07%	-32.63%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-394.0K	8.291M	3.729M
YoY Change	-103.81%	-32.69%	-59.45%
NET CHANGE
Cash From Operating Activities	19.46M	11.23M	12.79M
Cash From Investing Activities	-20.74M	-14.35M	-17.11M
Cash From Financing Activities	-394.0K	8.291M	3.729M
Net Change In Cash	-1.681M	5.170M	-588.0K
YoY Change	20.07%	-1165.98%	-163.91%
FREE CASH FLOW
Cash From Operating Activities	$19.46M	$11.23M	$12.79M
Capital Expenditures	$20.74M	$14.35M	$17.11M
Free Cash Flow	-$1.287M	-$3.121M	-$4.317M
YoY Change	-89.03%	-75.62%	-47.84%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	msex	Common Stock Value Authorized CommonStockValueAuthorized		usd
CY2023Q4	msex	Preferred Stock Value Authorized PreferredStockValueAuthorized		usd
CY2023Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding		usd
	dei	Document Type DocumentType	10-Q
	dei	Document Period End Date DocumentPeriodEndDate	2024-06-30
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	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 Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	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
CY2024Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17829778	shares
CY2024Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	49146000	usd
CY2023Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	42801000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	89670000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	80957000	usd
CY2024Q2	msex	Operations And Maintenance OperationsAndMaintenance	21825000	usd
CY2023Q2	msex	Operations And Maintenance OperationsAndMaintenance	21204000	usd
	msex	Operations And Maintenance OperationsAndMaintenance	42290000	usd
	msex	Operations And Maintenance OperationsAndMaintenance	41462000	usd
CY2024Q2	us-gaap	Depreciation Depreciation	6305000	usd
CY2023Q2	us-gaap	Depreciation Depreciation	6184000	usd
	us-gaap	Depreciation Depreciation	11701000	usd
	us-gaap	Depreciation Depreciation	12170000	usd
CY2024Q2	us-gaap	Taxes Other TaxesOther	5701000	usd
CY2023Q2	us-gaap	Taxes Other TaxesOther	4744000	usd
	us-gaap	Taxes Other TaxesOther	10499000	usd
	us-gaap	Taxes Other TaxesOther	9168000	usd
CY2024Q2	us-gaap	Operating Expenses OperatingExpenses	33831000	usd
CY2023Q2	us-gaap	Operating Expenses OperatingExpenses	32132000	usd
	us-gaap	Operating Expenses OperatingExpenses	64490000	usd
	us-gaap	Operating Expenses OperatingExpenses	62800000	usd
CY2024Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	15315000	usd
CY2023Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10669000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	25180000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	18157000	usd
CY2024Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	257000	usd
CY2023Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	852000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	433000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1665000	usd
CY2024Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2399000	usd
CY2023Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1290000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7588000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2188000	usd
CY2024Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2656000	usd
CY2023Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2142000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	8021000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	3853000	usd
CY2024Q2	us-gaap	Interest Expense InterestExpense	4041000	usd
CY2023Q2	us-gaap	Interest Expense InterestExpense	3251000	usd
	us-gaap	Interest Expense InterestExpense	7310000	usd
	us-gaap	Interest Expense InterestExpense	5846000	usd
CY2024Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13930000	usd
CY2023Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9560000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25891000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16164000	usd
CY2024Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3384000	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-341000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4663000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	397000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	10546000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9901000	usd
	us-gaap	Net Income Loss NetIncomeLoss	21228000	usd
	us-gaap	Net Income Loss NetIncomeLoss	15767000	usd
CY2024Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
CY2023Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	60000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	60000	usd
CY2024Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10516000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9871000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	21168000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15707000	usd
CY2024Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.19
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.89
CY2024Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.18
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2024Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17829000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17713000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17824000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17683000	shares
CY2024Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17944000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17828000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17939000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17798000	shares
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	307173000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	303791000	usd
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	825223000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	809862000	usd
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Common PublicUtilitiesPropertyPlantAndEquipmentCommon	102149000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Common PublicUtilitiesPropertyPlantAndEquipmentCommon	100593000	usd
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	29703000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	19636000	usd
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1264248000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1233882000	usd
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	244102000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	235540000	usd
CY2024Q2	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	1020146000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	998342000	usd
CY2024Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8025000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2390000	usd
CY2024Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2135000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2137000	usd
CY2024Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	20173000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	18172000	usd
CY2024Q2	msex	Litigation Settlements Receivable LitigationSettlementsReceivable	69872000	usd
CY2023Q4	msex	Litigation Settlements Receivable LitigationSettlementsReceivable	69872000	usd
CY2024Q2	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	12530000	usd
CY2023Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	9297000	usd
CY2024Q2	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	6477000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	6972000	usd
CY2024Q2	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3925000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1833000	usd
CY2024Q2	us-gaap	Assets Current AssetsCurrent	121002000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	108536000	usd
CY2024Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2872000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3185000	usd
CY2024Q2	msex	Preliminary Survey And Investigation Charges Non Current PreliminarySurveyAndInvestigationChargesNonCurrent	1968000	usd
CY2023Q4	msex	Preliminary Survey And Investigation Charges Non Current PreliminarySurveyAndInvestigationChargesNonCurrent	1932000	usd
CY2024Q2	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	91066000	usd
CY2023Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	90694000	usd
CY2024Q2	msex	Nonutility Assets Net Non Current NonutilityAssetsNetNonCurrent	11771000	usd
CY2023Q4	msex	Nonutility Assets Net Non Current NonutilityAssetsNetNonCurrent	11522000	usd
CY2024Q2	msex	Employee Benefit Plans EmployeeBenefitPlans	25763000	usd
CY2023Q4	msex	Employee Benefit Plans EmployeeBenefitPlans	21779000	usd
CY2024Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	51000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	62000	usd
CY2024Q2	us-gaap	Other Assets OtherAssets	133491000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	129174000	usd
CY2024Q2	us-gaap	Assets Assets	1274639000	usd
CY2023Q4	us-gaap	Assets Assets	1236052000	usd
CY2024Q2	us-gaap	Common Stock Value CommonStockValue	247014000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	246764000	usd
CY2024Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	185864000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	176227000	usd
CY2024Q2	us-gaap	Partners Capital PartnersCapital	432878000	usd
CY2023Q4	us-gaap	Partners Capital PartnersCapital	422991000	usd
CY2024Q2	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2024Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	355975000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	358153000	usd
CY2024Q2	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	790937000	usd
CY2023Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	783228000	usd
CY2024Q2	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	7968000	usd
CY2023Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	7740000	usd
CY2024Q2	us-gaap	Notes Payable Current NotesPayableCurrent	72250000	usd
CY2023Q4	us-gaap	Notes Payable Current NotesPayableCurrent	42750000	usd
CY2024Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	25222000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	27618000	usd
CY2024Q2	msex	Litigation Settlement Payable LitigationSettlementPayable	6237000	usd
CY2023Q4	msex	Litigation Settlement Payable LitigationSettlementPayable	6237000	usd
CY2024Q2	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	14241000	usd
CY2023Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	10535000	usd
CY2024Q2	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	3252000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	3138000	usd
CY2024Q2	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	1689000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	1390000	usd
CY2024Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4124000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4421000	usd
CY2024Q2	us-gaap	Liabilities Current LiabilitiesCurrent	134983000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	103829000	usd
CY2024Q2	msex	Construction Advances ConstructionAdvances	21145000	usd
CY2023Q4	msex	Construction Advances ConstructionAdvances	21313000	usd
CY2024Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2747000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3063000	usd
CY2024Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	91800000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	88736000	usd
CY2024Q2	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	55203000	usd
CY2023Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	113021000	usd
CY2024Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	420000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	592000	usd
CY2024Q2	us-gaap	Other Liabilities OtherLiabilities	171315000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	226725000	usd
CY2024Q2	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	177404000	usd
CY2023Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	122270000	usd
CY2024Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1274639000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1236052000	usd
	us-gaap	Net Income Loss NetIncomeLoss	21228000	usd
	us-gaap	Net Income Loss NetIncomeLoss	15767000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13008000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	14543000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1722000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2993000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	253000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1014000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	199000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	207000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1072000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1366000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2001000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-788000	usd
	msex	Increase Decreasein Unbilled Revenues IncreaseDecreaseinUnbilledRevenues	3233000	usd
	msex	Increase Decreasein Unbilled Revenues IncreaseDecreaseinUnbilledRevenues	2408000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	-495000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	249000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	2092000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	846000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2396000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3418000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	3706000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	843000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	114000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	563000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-4457000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-975000	usd
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	299000	usd
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	111000	usd
	msex	Increase Decreasein Recovered Costs Environmental Litigation Settlement IncreaseDecreaseinRecoveredCostsEnvironmentalLitigationSettlement	8003000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1131000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-580000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17879000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	29287000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	180000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	651000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	28737000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	50635000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-28737000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-50635000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2493000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2553000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	561000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	62880000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	29500000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-32000000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	41000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	107000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1328000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	505000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5745000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11531000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11049000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	60000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	60000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1380000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-959000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16493000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	21897000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	5635000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	549000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2390000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3828000	usd
CY2024Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8025000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4377000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	4461000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	4219000	usd
	us-gaap	Interest Paid Net InterestPaidNet	7417000	usd
	us-gaap	Interest Paid Net InterestPaidNet	5491000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	180000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	651000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	752000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	260000	usd
CY2024Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000	shares
CY2024Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17829000	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17821000	shares
CY2024Q2	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	247014000	usd
CY2023Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	246764000	usd
CY2024Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	185864000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	176227000	usd
CY2024Q2	us-gaap	Partners Capital PartnersCapital	432878000	usd
CY2023Q4	us-gaap	Partners Capital PartnersCapital	422991000	usd
CY2024Q2	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2023Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2024Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20000	shares
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2023	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2024Q2	us-gaap	Long Term Debt Current LongTermDebtCurrent	362804000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	364736000	usd
CY2024Q2	us-gaap	Debt Instrument Unamortized Premium Current DebtInstrumentUnamortizedPremiumCurrent	6432000	usd
CY2023Q4	us-gaap	Debt Instrument Unamortized Premium Current DebtInstrumentUnamortizedPremiumCurrent	6529000	usd
CY2024Q2	us-gaap	Debt Instrument Unamortized Discount Current DebtInstrumentUnamortizedDiscountCurrent	5293000	usd
CY2023Q4	us-gaap	Debt Instrument Unamortized Discount Current DebtInstrumentUnamortizedDiscountCurrent	5372000	usd
CY2024Q2	us-gaap	Deferred Finance Costs Current Gross DeferredFinanceCostsCurrentGross	7968000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Current Gross DeferredFinanceCostsCurrentGross	7740000	usd
CY2024Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	355975000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	358153000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	400328000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	5868000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	2342000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	360000	usd
CY2023Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5513000	usd
CY2023Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	403355000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9901000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3402000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	27000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	360000	usd
CY2023Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5538000	usd
CY2023Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	411477000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	422991000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	10682000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	252000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-465000	usd
CY2024Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5738000	usd
CY2024Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2024Q1	us-gaap	Stockholders Equity StockholdersEquity	427692000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	10546000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	253000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-187000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	397000	usd
CY2024Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5793000	usd
CY2024Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	432878000	usd
CY2024Q2	us-gaap	Public Utilities Approved Rate Increase Decrease Amount PublicUtilitiesApprovedRateIncreaseDecreaseAmount	563100000	usd
CY2024Q2	us-gaap	Public Utilities Approved Return On Equity Percentage PublicUtilitiesApprovedReturnOnEquityPercentage	0.096	pure
	us-gaap	Carrying Costs Property And Exploration Rights CarryingCostsPropertyAndExplorationRights	4100000	usd
CY2024Q2	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	1400000	usd
CY2024Q2	msex	Surcharge For Costs Incurred SurchargeForCostsIncurred	1200000	usd
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	9683000	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	500000	usd
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	75764000	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	5700000	usd
	us-gaap	Sale Of Stock Consideration Received On Transaction SaleOfStockConsiderationReceivedOnTransaction	1000000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.02	pure
CY2024Q2	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	132619000	usd
CY2024Q2	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	129574000	usd
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	133374000	usd
CY2023Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	131745000	usd
CY2024Q2	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	230200000	usd
CY2023Q4	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	231300000	usd
CY2024Q2	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21100000	usd
CY2023Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21300000	usd
CY2024Q2	us-gaap	Preferred Stock Convertible Conversion Price PreferredStockConvertibleConversionPrice	7
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segments
CY2024Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	49146000	usd
CY2023Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	42801000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	89670000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	80957000	usd
CY2024Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	15315000	usd
CY2023Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10669000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	25180000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	18157000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	10546000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9901000	usd
	us-gaap	Net Income Loss NetIncomeLoss	21228000	usd
	us-gaap	Net Income Loss NetIncomeLoss	15767000	usd
CY2024Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	14348000	usd
CY2023Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26120000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	28737000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	50635000	usd
CY2024Q2	us-gaap	Assets Assets	1274639000	usd
CY2023Q4	us-gaap	Assets Assets	1236052000	usd
CY2024Q2	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	140000000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	72300000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	67700000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	140000000	usd
	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	10000000	usd
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	63600000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	62934000	usd
CY2023Q2	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	24220000	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	56463000	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	36848000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0643	pure
CY2023Q2	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0609	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0642	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0575	pure
	msex	Average Purchase Of Gallons AveragePurchaseOfGallons	47	l
CY2024Q1	msex	Cost Of Treated Water CostOfTreatedWater	992000	usd
CY2023Q1	msex	Cost Of Treated Water CostOfTreatedWater	1363000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	1901000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	2747000	usd
CY2024Q1	msex	Cost Of Untreated Water CostOfUntreatedWater	861000	usd
CY2023Q1	msex	Cost Of Untreated Water CostOfUntreatedWater	739000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	1711000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	1540000	usd
CY2024Q1	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	1853000	usd
CY2023Q1	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	2102000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	3612000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	4287000	usd
CY2024Q2	msex	Estimated Incremental Borrowing Rate EstimatedIncrementalBorrowingRate	0.0403	pure
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	400000	usd
CY2024Q2	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2023Q4	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2024Q2	msex	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	4400000	usd
CY2023Q4	msex	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	4100000	usd
CY2024Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2900000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3200000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	400000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	800000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	900000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	900000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	900000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	900000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	4800000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1500000	usd
CY2024Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	3300000	usd
CY2024Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	2700000	usd
	msex	Estimatedobligationexpenditure Estimatedobligationexpenditure	13000000	usd
	us-gaap	Pension Contributions PensionContributions	2000000	usd
CY2024Q2	us-gaap	Pension Contributions PensionContributions	2000000	usd
	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	900000	usd
CY2024Q2	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	3293000	usd
CY2023Q2	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	2942000	usd
	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	6381000	usd
	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	6172000	usd
CY2024Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	49116000	usd
CY2023Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	42763000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	89607000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	80871000	usd
CY2024Q2	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	143000	usd
CY2023Q2	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	88000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	205000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	163000	usd
CY2024Q2	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	117000	usd
CY2023Q2	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	114000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	233000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	226000	usd
CY2024Q2	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-230000	usd
CY2023Q2	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-164000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-375000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-303000	usd
CY2024Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	49146000	usd
CY2023Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	42801000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	89670000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	80957000	usd
CY2024Q2	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2024Q2	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024Q2	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2024Q2	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2024Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
	msex	Increase Decreasein Recovered Costs Environmental Litigation Settlement IncreaseDecreaseinRecoveredCostsEnvironmentalLitigationSettlement		usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock		usd
CY2024Q2	msex	Common Stock Value Authorized CommonStockValueAuthorized		usd
CY2024Q2	msex	Preferred Stock Value Authorized PreferredStockValueAuthorized		usd
CY2024Q2	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding		usd
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Entity Central Index Key EntityCentralIndexKey	0000066004

Files In Submission

Name	View Source	Status
0001174947-24-000934-index-headers.html	Edgar Link	pending
0001174947-24-000934-index.html	Edgar Link	pending
0001174947-24-000934.txt	Edgar Link	pending
0001174947-24-000934-xbrl.zip	Edgar Link	pending
ex10-55.htm	Edgar Link	pending
ex10-56.htm	Edgar Link	pending
ex10-57.htm	Edgar Link	pending
ex10-58.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-20240630.htm	Edgar Link	pending
msex-20240630.xsd	Edgar Link	pending
msex-20240630_cal.xml	Edgar Link	unprocessable
msex-20240630_def.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
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R2.htm	Edgar Link	pending
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R28.htm	Edgar Link	pending
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R34.htm	Edgar Link	pending
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R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
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-20240630_lab.xml	Edgar Link	unprocessable
msex-20240630_pre.xml	Edgar Link	unprocessable
msex-20240630_htm.xml	Edgar Link	completed
FilingSummary.xml	Edgar Link	unprocessable

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$MSEX
MIDDLESEX WATER CO Stock $msex

2024 Q3 Form 10-Q Financial Statement

#000117494724000934 Filed on July 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX MIDDLESEX WATER CO Stock $msex

2024 Q3 Form 10-Q Financial Statement

#000117494724000934 Filed on July 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX
MIDDLESEX WATER CO Stock $msex