$MSEX
MIDDLESEX WATER CO Stock $msex

$msex Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000117494723000258 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022 Q3
Revenue	$38.11M	$38.82M	$47.70M
YoY Change	5.28%	14.1%	19.62%
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	$7.201M	$7.340M	$5.814M
YoY Change	5.51%	-23.11%	33.56%
% of Gross Profit
Operating Expenses	$30.67M	$30.68M	$31.16M
YoY Change	6.09%	10.8%	9.51%
Operating Profit	$7.490M	$8.147M	$16.58M
YoY Change	-40.19%	28.52%	45.09%
Interest Expense	$2.595M	-$2.793M	$2.355M
YoY Change	40.27%	26.72%	-212.09%
% of Operating Profit	34.65%	-34.28%	14.21%
Other Income/Expense, Net	$1.711M	$1.204M	$2.039M
YoY Change	-2.56%	20.76%	174.06%
Pretax Income	$6.606M	$7.319M	$16.26M
YoY Change	-46.85%	35.34%	56.17%
Income Tax	$738.0K	$148.0K	$1.968M
% Of Pretax Income	11.17%	2.02%	12.1%
Net Earnings	$5.868M	$7.169M	$14.29M
YoY Change	-51.5%	-0.94%	24.53%
Net Earnings / Revenue	15.4%	18.47%	29.96%
Basic Earnings Per Share	$0.33	$0.40	$0.81
Diluted Earnings Per Share	$0.33	$0.40	$0.80
COMMON SHARES
Basic Shares Outstanding	17.64M shares	17.64M shares	17.61M shares
Diluted Shares Outstanding	17.77K shares		17.74K shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$4.862M	$3.828M	$2.908M
YoY Change	47.6%	8.35%	-44.95%
Cash & Equivalents	$4.862M	$3.828M	$2.908M
Short-Term Investments
Other Short-Term Assets	$12.57M	$11.28M	$14.69M
YoY Change	17.27%	11.13%	12.14%
Inventory	$6.559M	$6.177M	$5.792M
Prepaid Expenses	$3.914M	$2.624M	$3.669M
Receivables	$15.53M	$16.02M	$18.08M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$39.52M	$37.31M	$41.47M
YoY Change	20.25%	8.59%	2.23%
LONG-TERM ASSETS
Property, Plant & Equipment	$957.1M	$935.6M	$914.9M
YoY Change	9.54%	6.16%	5.66%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$39.00K	$19.00K	$105.0K
YoY Change	-41.79%	-77.11%	-99.91%
Total Long-Term Assets	$1.059B	$1.037B	$1.023B
YoY Change	8.46%	5.22%	3.46%
TOTAL ASSETS
Total Short-Term Assets	$39.52M	$37.31M	$41.47M
Total Long-Term Assets	$1.059B	$1.037B	$1.023B
Total Assets	$1.099B	$1.074B	$1.065B
YoY Change	8.85%	5.34%	3.41%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$27.62M	$24.85M	$25.87M
YoY Change	52.96%	17.62%	49.21%
Accrued Expenses	$3.098M	$3.235M	$2.874M
YoY Change	16.47%	16.12%	44.13%
Deferred Revenue
YoY Change
Short-Term Debt	$28.50M	$55.50M	$40.50M
YoY Change	90.0%	326.92%	-19.0%
Long-Term Debt Due	$17.45M	$17.46M	$7.567M
YoY Change	160.04%	159.43%	11.18%
Total Short-Term Liabilities	$95.98M	$117.9M	$92.97M
YoY Change	60.85%	108.16%	0.51%
LONG-TERM LIABILITIES
Long-Term Debt	$329.6M	$290.3M	$301.2M
YoY Change	7.54%	-5.3%	13.04%
Other Long-Term Liabilities	$837.0K	$919.0K	$1.004M
YoY Change	-22.57%	-15.38%	-99.59%
Total Long-Term Liabilities	$330.5M	$291.2M	$302.2M
YoY Change	7.44%	-5.33%	13.42%
TOTAL LIABILITIES
Total Short-Term Liabilities	$95.98M	$117.9M	$92.97M
Total Long-Term Liabilities	$330.5M	$291.2M	$302.2M
Total Liabilities	$426.5M	$409.1M	$395.2M
YoY Change	16.11%	12.31%	-40.59%
SHAREHOLDERS EQUITY
Retained Earnings	$167.6M	$167.3M	$165.7M
YoY Change	9.69%	14.72%
Common Stock	$235.8M	$233.1M	$232.4M
YoY Change	4.74%	5.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$403.4M	$402.4M	$400.2M
YoY Change
Total Liabilities & Shareholders Equity	$1.099B	$1.074B	$1.065B
YoY Change	8.85%	5.34%	3.41%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022 Q3
OPERATING ACTIVITIES
Net Income	$5.868M	$7.169M	$14.29M
YoY Change	-51.5%	-0.94%	24.53%
Depreciation, Depletion And Amortization	$7.201M	$7.340M	$5.814M
YoY Change	5.51%	-23.11%	33.56%
Cash From Operating Activities	$15.97M	$17.12M	$17.38M
YoY Change	14.28%	18.97%	328.18%
INVESTING ACTIVITIES
Capital Expenditures	$24.52M	$25.40M	$26.60M
YoY Change	47.41%	-240.05%	80.37%
Acquisitions
YoY Change
Other Investing Activities	$0.00	$0.00	$0.00
YoY Change	-100.0%
Cash From Investing Activities	-$24.52M	-$25.40M	-$26.60M
YoY Change	81.47%	40.05%	80.37%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$1.553M
YoY Change	26.47%
Cash From Financing Activities	$9.579M	9.196M	7.804M
YoY Change	-1458.72%	361.18%	-20.21%
NET CHANGE
Cash From Operating Activities	$15.97M	17.12M	17.38M
Cash From Investing Activities	-$24.52M	-25.40M	-26.60M
Cash From Financing Activities	$9.579M	9.196M	7.804M
Net Change In Cash	$1.034M	920.0K	-1.412M
YoY Change	-532.64%	-152.6%	56.02%
FREE CASH FLOW
Cash From Operating Activities	$15.97M	$17.12M	$17.38M
Capital Expenditures	$24.52M	$25.40M	$26.60M
Free Cash Flow	-$8.545M	-$8.276M	-$9.216M
YoY Change	221.72%	-125.45%	-13.76%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	0-422
CY2022	dei	Entity Registrant Name EntityRegistrantName	MIDDLESEX WATER COMPANY
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-1114430
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	485C Route 1 South
CY2022	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 400
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Iselin
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	08830
CY2022	dei	City Area Code CityAreaCode	(732)
CY2022	dei	Local Phone Number LocalPhoneNumber	634-1500
CY2022	dei	Security12b Title Security12bTitle	Common Stock, No Par Value
CY2022	dei	Trading Symbol TradingSymbol	MSEX
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	1505071215	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17642147	shares
CY2022	dei	Auditor Name AuditorName	Baker Tilly US, LLP
CY2022	dei	Auditor Location AuditorLocation	Philadelphia
CY2022	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	162434000	usd
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	143141000	usd
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	141592000	usd
CY2022	msex	Operations And Maintenance OperationsAndMaintenance	79096000	usd
CY2021	msex	Operations And Maintenance OperationsAndMaintenance	73671000	usd
CY2020	msex	Operations And Maintenance OperationsAndMaintenance	70796000	usd
CY2022	us-gaap	Depreciation Depreciation	23029000	usd
CY2021	us-gaap	Depreciation Depreciation	21109000	usd
CY2020	us-gaap	Depreciation Depreciation	18472000	usd
CY2022	us-gaap	Taxes Other TaxesOther	18208000	usd
CY2021	us-gaap	Taxes Other TaxesOther	15150000	usd
CY2020	us-gaap	Taxes Other TaxesOther	14904000	usd
CY2022	us-gaap	Operating Expenses OperatingExpenses	120333000	usd
CY2021	us-gaap	Operating Expenses OperatingExpenses	109930000	usd
CY2020	us-gaap	Operating Expenses OperatingExpenses	104172000	usd
CY2022	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	5232000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	47333000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	33211000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	37420000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	2314000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	2653000	usd
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	4016000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5389000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3305000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	363000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	7703000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5958000	usd
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	4379000	usd
CY2022	us-gaap	Interest Expense InterestExpense	9367000	usd
CY2021	us-gaap	Interest Expense InterestExpense	8114000	usd
CY2020	us-gaap	Interest Expense InterestExpense	7493000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	45669000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	31055000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	34306000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3240000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5488000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4119000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	42429000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	36543000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	38425000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	120000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	120000	usd
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	120000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	42309000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	36423000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	38305000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.4
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.19
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.39
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.18
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17597	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17492	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17459	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17712	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17607	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17574	shares
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	249153000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	247286000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	735138000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	697200000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	97581000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	95658000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	53570000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	24947000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1135442000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1065091000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	214891000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	199723000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	920551000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	865368000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3828000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3533000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2326000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2574000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	16018000	usd
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	15311000	usd
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	8659000	usd
CY2021Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	7273000	usd
CY2022Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	6177000	usd
CY2021Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	5358000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2624000	usd
CY2021Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2880000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	37306000	usd
CY2021Q4	us-gaap	Assets Current AssetsCurrent	34355000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3826000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4503000	usd
CY2022Q4	msex	Preliminary Survey And Investigation Charges PreliminarySurveyAndInvestigationCharges	2806000	usd
CY2021Q4	msex	Preliminary Survey And Investigation Charges PreliminarySurveyAndInvestigationCharges	3540000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	90046000	usd
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	100738000	usd
CY2022Q4	msex	Non Utility Assets Net NonUtilityAssetsNet	11207000	usd
CY2021Q4	msex	Non Utility Assets Net NonUtilityAssetsNet	11428000	usd
CY2022Q4	msex	Employee Benefit Plans EmployeeBenefitPlans	8689000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	19000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	83000	usd
CY2022Q4	msex	Deferred Charges And Other Assets DeferredChargesAndOtherAssets	116593000	usd
CY2021Q4	msex	Deferred Charges And Other Assets DeferredChargesAndOtherAssets	120292000	usd
CY2022Q4	us-gaap	Assets Assets	1074450000	usd
CY2021Q4	us-gaap	Assets Assets	1020015000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	233054000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	221919000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	167274000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	145807000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2021Q4	msex	Total Common Equity TotalCommonEquity	367726000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	290280000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	306520000	usd
CY2022Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	692692000	usd
CY2021Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	676330000	usd
CY2022Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	17462000	usd
CY2021Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	6731000	usd
CY2022Q4	us-gaap	Notes Payable Current NotesPayableCurrent	55500000	usd
CY2021Q4	us-gaap	Notes Payable Current NotesPayableCurrent	13000000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	24847000	usd
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	21125000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12162000	usd
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	8621000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2535000	usd
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1986000	usd
CY2022Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	1365000	usd
CY2021Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	1330000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3988000	usd
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3826000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	117859000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	56619000	usd
CY2022Q4	msex	Construction Advances ConstructionAdvances	21382000	usd
CY2021Q4	msex	Construction Advances ConstructionAdvances	23529000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3706000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	4367000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	77783000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	69500000	usd
CY2021Q4	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	11290000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	46734000	usd
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	49431000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	919000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1086000	usd
CY2022Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	150524000	usd
CY2021Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	159203000	usd
CY2022Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	113375000	usd
CY2021Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	127863000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1074450000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1020015000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	42429000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	36543000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	38425000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	27475000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	26799000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20838000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5334000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-10989000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-13490000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1387000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1505000	usd
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	2503000	usd
CY2022	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-401000	usd
CY2021	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	136000	usd
CY2020	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	391000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	1630000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	1338000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	1096000	usd
CY2022	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	5232000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	707000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	742000	usd
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2661000	usd
CY2022	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	1386000	usd
CY2021	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	208000	usd
CY2020	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	-118000	usd
CY2022	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	819000	usd
CY2021	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	246000	usd
CY2020	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	-333000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-256000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-6000	usd
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	519000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3722000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-9318000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7137000	usd
CY2022	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	3541000	usd
CY2021	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-1517000	usd
CY2020	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	2503000	usd
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	549000	usd
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-151000	usd
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	106000	usd
CY2022	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-4266000	usd
CY2021	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-2645000	usd
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1377000	usd
CY2022	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	35000	usd
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	75000	usd
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	44000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-454000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	4276000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3696000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	61361000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	33028000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	53355000	usd
CY2022	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	927000	usd
CY2021	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	1148000	usd
CY2020	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	1513000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	91335000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	79378000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	105619000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3122000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-88213000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-79378000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-105619000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7423000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	52691000	usd
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7472000	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2662000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	86595000	usd
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	50316000	usd
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	42500000	usd
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	11000000	usd
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-18000000	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	624000	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	994000	usd
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	148000	usd
CY2022	msex	Proceeds From Issuance Of Common Stock Expense ProceedsFromIssuanceOfCommonStockExpense	-32000	usd
CY2020	msex	Proceeds From Issuance Of Common Stock Expense ProceedsFromIssuanceOfCommonStockExpense	-37000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	10335000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3837000	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1230000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20810000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19373000	usd
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	18178000	usd
CY2022	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	120000	usd
CY2021	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	120000	usd
CY2020	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	120000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	659000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	11225000	usd
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	8578000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	27147000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	39479000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16169000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	295000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-6871000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-36095000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3533000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	10404000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	46499000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3828000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3533000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	10404000	usd
CY2022	us-gaap	Contribution Of Property ContributionOfProperty	6252000	usd
CY2021	us-gaap	Contribution Of Property ContributionOfProperty	4750000	usd
CY2020	us-gaap	Contribution Of Property ContributionOfProperty	5080000	usd
CY2021	msex	Deobligated Principal Payments DeobligatedPrincipalPayments	64000	usd
CY2020	msex	Deobligated Principal Payments DeobligatedPrincipalPayments	258000	usd
CY2022	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary	2100000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	9251000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	8546000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	7644000	usd
CY2022	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	927000	usd
CY2021	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	1148000	usd
CY2020	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	1513000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3230000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3335000	usd
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2509000	usd
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17642	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17522	shares
CY2022	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	233054000	usd
CY2021	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	221919000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	167274000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	145807000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2021Q4	msex	Total Common Equity TotalCommonEquity	367726000	usd
CY2022Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2021Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20	shares
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20	shares
CY2022	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2021	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	306387000	usd
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	311146000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	6873000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	7271000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	5518000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	5166000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	17462000	usd
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	6731000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	290280000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	306520000	usd
CY2019Q4	msex	Total Common Equity TotalCommonEquity	323792000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	38425000	usd
CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	1230000	usd
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	851000	usd
CY2020	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	245000	usd
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18178000	usd
CY2020	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	120000	usd
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	-37000	usd
CY2020Q4	msex	Total Common Equity TotalCommonEquity	346208000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	36543000	usd
CY2021	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3837000	usd
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	350000	usd
CY2021	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	281000	usd
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19373000	usd
CY2021	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	120000	usd
CY2021Q4	msex	Total Common Equity TotalCommonEquity	367726000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	42429000	usd
CY2022	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	10335000	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	520000	usd
CY2022	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	280000	usd
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	20810000	usd
CY2022	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	120000	usd
CY2022	us-gaap	Stockholders Equity Other StockholdersEquityOther	-32000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2022	us-gaap	Nature Of Operations NatureOfOperations	<p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b>(a) Organization</b> - Middlesex Water Company (Middlesex or the Company) is the parent company and sole shareholder of Tidewater Utilities, Inc. (Tidewater), Pinelands Water Company (Pinelands Water) and Pinelands Wastewater Company (Pinelands Wastewater) (collectively, Pinelands), Utility Service Affiliates, Inc. (USA), Utility Service Affiliates (Perth Amboy) Inc. (USA-PA) and Twin Lakes Utilities, Inc. (Twin Lakes). Southern Shores Water Company, LLC (Southern Shores) and White Marsh Environmental Systems, Inc. (White Marsh) are wholly-owned subsidiaries of Tidewater.</p><p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"> </p><p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Middlesex has operated as a water utility in New Jersey since 1897 and in Delaware, through our wholly-owned subsidiary, Tidewater, since 1992. We are in the business of collecting, treating, distributing and selling water for domestic, commercial, municipal, industrial and fire protection purposes. We also operate New Jersey municipal water, wastewater and storm water systems under contract and provide unregulated water and wastewater services in New Jersey and Delaware through our subsidiaries. Our rates charged to customers for water and wastewater services, the quality of services we provide and certain other matters are regulated in New Jersey and Delaware by the New Jersey Board of Public Utilities (NJBPU) and the Delaware Public Service Commission (DEPSC), respectively. Our USA, USA-PA and White Marsh subsidiaries are not regulated utilities.</p><p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"> </p>
CY2022	msex	Percent Voting Interest PercentVotingInterest	0.50	pure
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	900000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1100000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	700000	usd
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	400000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1467000	usd
CY2022	msex	Percent Of Operating Revenues PercentOfOperatingRevenues	0.93	pure
CY2022	msex	Percent Of Total Assets PercentOfTotalAssets	0.99	pure
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	500000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2598000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2300000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2600000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	500000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1242000	usd
CY2022	msex	Residential Operating Revenues ResidentialOperatingRevenues	84950000	usd
CY2021	msex	Residential Operating Revenues ResidentialOperatingRevenues	77699000	usd
CY2020	msex	Residential Operating Revenues ResidentialOperatingRevenues	76798000	usd
CY2022	msex	Commercial Operating Revenues CommercialOperatingRevenues	22689000	usd
CY2021	msex	Commercial Operating Revenues CommercialOperatingRevenues	16715000	usd
CY2020	msex	Commercial Operating Revenues CommercialOperatingRevenues	15448000	usd
CY2022	msex	Industrial Operating Revenues IndustrialOperatingRevenues	11152000	usd
CY2021	msex	Industrial Operating Revenues IndustrialOperatingRevenues	8990000	usd
CY2020	msex	Industrial Operating Revenues IndustrialOperatingRevenues	9512000	usd
CY2022	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	12726000	usd
CY2021	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	12608000	usd
CY2020	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	12374000	usd
CY2022	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	18769000	usd
CY2021	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	14590000	usd
CY2020	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	15187000	usd
CY2022	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	12006000	usd
CY2021	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	12391000	usd
CY2020	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	12130000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	162292000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	142993000	usd
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	141449000	usd
CY2022	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	831000	usd
CY2021	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	929000	usd
CY2020	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	532000	usd
CY2022	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	440000	usd
CY2021	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	427000	usd
CY2020	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	415000	usd
CY2022	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-1129000	usd
CY2021	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-1208000	usd
CY2020	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-804000	usd
CY2022	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	162434000	usd
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	143141000	usd
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	141592000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	933000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1490000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	260000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-871000	usd
CY2022	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0539	pure
CY2022	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-68000	usd
CY2021	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-72000	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b>(q) Use of Estimates</b> - Conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts in the financial statements. Actual results could differ from those estimates.</p><p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"> </p>
CY2022Q4	us-gaap	Income Tax Examination Penalties Accrued IncomeTaxExaminationPenaltiesAccrued	500	usd
CY2022Q1	msex	Common Stock Subsidary Percentage CommonStockSubsidaryPercentage	1	pure
CY2022Q1	us-gaap	Cash Cash	6400000	usd
CY2022Q1	us-gaap	Business Combination Consideration Transferred Other1 BusinessCombinationConsiderationTransferredOther1	5200000	usd
CY2022Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.06	pure
CY2022	us-gaap	Revenues Excluding Interest And Dividends RevenuesExcludingInterestAndDividends	2200000	usd
CY2022	msex	Dsic Rate Description DSICRateDescription	Tidewater reset its Distribution System Improvement Charge (DSIC) rate to zero effective April 1, 2021
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-4281000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1381000	usd
CY2022Q4	us-gaap	Regulatory Assets RegulatoryAssets	90046000	usd
CY2021Q4	us-gaap	Regulatory Assets RegulatoryAssets	100738000	usd
CY2022Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	290000000	usd
CY2021Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	30400000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9590000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6521000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7204000	usd
CY2022	us-gaap	Income Tax Reconciliation Disposition Of Assets IncomeTaxReconciliationDispositionOfAssets	-1106000	usd
CY2021	us-gaap	Income Tax Reconciliation Disposition Of Assets IncomeTaxReconciliationDispositionOfAssets	-1290000	usd
CY2020	us-gaap	Income Tax Reconciliation Disposition Of Assets IncomeTaxReconciliationDispositionOfAssets	-1356000	usd
CY2022	msex	Income Tax Reconciliation Tangible Property Repairs IncomeTaxReconciliationTangiblePropertyRepairs	-6767000	usd
CY2021	msex	Income Tax Reconciliation Tangible Property Repairs IncomeTaxReconciliationTangiblePropertyRepairs	-12281000	usd
CY2020	msex	Income Tax Reconciliation Tangible Property Repairs IncomeTaxReconciliationTangiblePropertyRepairs	-11298000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1296000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1499000	usd
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1364000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	227000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	63000	usd
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-33000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3240000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5488000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4119000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	425000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-8247000	usd
CY2020	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-75000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3240000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	431000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5488000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4119000	usd
CY2022Q4	msex	Deferred Tax Liabilities Utility Plant Related DeferredTaxLiabilitiesUtilityPlantRelated	72996000	usd
CY2021Q4	msex	Deferred Tax Liabilities Utility Plant Related DeferredTaxLiabilitiesUtilityPlantRelated	65107000	usd
CY2022Q4	msex	Deferred Tax Assets Customer Advances DeferredTaxAssetsCustomerAdvances	-3568000	usd
CY2021Q4	msex	Deferred Tax Assets Customer Advances DeferredTaxAssetsCustomerAdvances	-3595000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	7380000	usd
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	7091000	usd
CY2022Q4	msex	Deferred Tax Liabilities Investment Tax Credits DeferredTaxLiabilitiesInvestmentTaxCredits	304000	usd
CY2021Q4	msex	Deferred Tax Liabilities Investment Tax Credits DeferredTaxLiabilitiesInvestmentTaxCredits	373000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	671000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	524000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	77783000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	69500000	usd
CY2022	msex	Cost Of Untreated Water CostOfUntreatedWater	3200000	usd
CY2021	msex	Cost Of Untreated Water CostOfUntreatedWater	3300000	usd
CY2020	msex	Cost Of Untreated Water CostOfUntreatedWater	3400000	usd
CY2022	msex	Cost Of Treated Water CostOfTreatedWater	3900000	usd
CY2021	msex	Cost Of Treated Water CostOfTreatedWater	3600000	usd
CY2020	msex	Cost Of Treated Water CostOfTreatedWater	3600000	usd
CY2022	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	7100000	usd
CY2021	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	6900000	usd
CY2020	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	7000000	usd
CY2022Q4	msex	Estimated Incremental Borrowing Rate EstimatedIncrementalBorrowingRate	0.0403	pure
CY2022	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	800000	usd
CY2022Q4	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2021Q4	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2022Q4	msex	Right Of Use Assets Accumulated Amortization RightOfUseAssetsAccumulatedAmortization	3500000	usd
CY2021Q4	msex	Right Of Use Assets Accumulated Amortization RightOfUseAssetsAccumulatedAmortization	2800000	usd
CY2022Q4	msex	Right Of Use Assets Current RightOfUseAssetsCurrent	3800000	usd
CY2021Q4	msex	Right Of Use Assets Current RightOfUseAssetsCurrent	4500000	usd
CY2022Q4	us-gaap	Line Of Credit LineOfCredit	30000000	usd
CY2022Q4	msex	Increase Line Of Credit IncreaseLineOfCredit	60000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	800000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	800000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	800000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	900000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	900000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1800000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1600000	usd
CY2022Q4	msex	Operating Lease Liability1 OperatingLeaseLiability1	4400000	usd
CY2022Q4	msex	Noncurrent Leases Liability NoncurrentLeasesLiability	3700000	usd
CY2022	msex	Budgeted Construction Cost BudgetedConstructionCost	102000000	usd
CY2022	msex	Budgeted Construction Cost For Construction Program Year One BudgetedConstructionCostForConstructionProgramYearOne	86000000	usd
CY2022	msex	Budgeted Construction Cost For Construction Program Year Two BudgetedConstructionCostForConstructionProgramYearTwo	78000000	usd
CY2022	msex	Estimatedobligationexpenditure Estimatedobligationexpenditure	16800000	usd
CY2022	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	28900000	usd
CY2021	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	23700000	usd
CY2022	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0334	pure
CY2021	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0112	pure
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	55500000	usd
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	13000000	usd
CY2022Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0517	pure
CY2021Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0104	pure
CY2022Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	140000000	usd
CY2022Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	55500000	usd
CY2022Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	84500000	usd
CY2022Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	140000000	usd
CY2022Q4	msex	Earnings Applicable To Common Stockin Shares EarningsApplicableToCommonStockinShares	17597	shares
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	36423000	usd
CY2021Q4	msex	Earnings Applicable To Common Stockin Shares EarningsApplicableToCommonStockinShares	17492	shares
CY2022Q4	msex	Additional Shares Authorized By Sec To Be Issued AdditionalSharesAuthorizedBySECToBeIssued	200000	shares
CY2022Q4	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	700000	shares
CY2022	msex	Percentage Of Principal With Market Interest Rate PercentageOfPrincipalWithMarketInterestRate	0	pure
CY2022Q4	us-gaap	Loans Payable LoansPayable	10000000	usd
CY2022	msex	Participate Rate Program ParticipateRateProgram	0	pure
CY2021Q4	msex	Borrowed Loan BorrowedLoan	2600000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	17500000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	7400000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	6900000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	6700000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	6400000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	261500000	usd
CY2022	msex	Convertible Preferred Stock ConvertiblePreferredStock	7
CY2022	us-gaap	Income Loss Including Portion Attributable To Noncontrolling Interest IncomeLossIncludingPortionAttributableToNoncontrollingInterest	42429000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17597	shares
CY2021	us-gaap	Income Loss Including Portion Attributable To Noncontrolling Interest IncomeLossIncludingPortionAttributableToNoncontrollingInterest	36543000	usd
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17492	shares
CY2020	us-gaap	Income Loss Including Portion Attributable To Noncontrolling Interest IncomeLossIncludingPortionAttributableToNoncontrollingInterest	38425000	usd
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17459	shares
CY2022	msex	Preferred Stock Dividends Income Statement Impacts PreferredStockDividendsIncomeStatementImpacts	-120000	usd
CY2021	msex	Preferred Stock Dividends Income Statement Impacts PreferredStockDividendsIncomeStatementImpacts	-120000	usd
CY2020	msex	Preferred Stock Dividends Income Statement Impacts PreferredStockDividendsIncomeStatementImpacts	-120000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	42309000	usd
CY2022Q4	msex	Earnings Applicable To Common Stockin Shares EarningsApplicableToCommonStockinShares	17597	shares
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	36423000	usd
CY2021Q4	msex	Earnings Applicable To Common Stockin Shares EarningsApplicableToCommonStockinShares	17492	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	38305000	usd
CY2020Q4	msex	Earnings Applicable To Common Stockin Shares EarningsApplicableToCommonStockinShares	17459	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.4
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.19
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	42309000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	38305000	usd
CY2022Q1	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.68
CY2020Q4	msex	Earnings Applicable To Common Stockin Shares EarningsApplicableToCommonStockinShares	17459	shares
CY2022	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	7
CY2021	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	7
CY2020	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	7
CY2022	msex	Convertible Dollar7 Preferred Series Stock Dividends ConvertibleDollar7PreferredSeriesStockDividends	67000	usd
CY2022	msex	Incremental Common Shares Attributable To Conversion Of Dollar7 Preferred Series Stock IncrementalCommonSharesAttributableToConversionOfDollar7PreferredSeriesStock	115	shares
CY2021	msex	Convertible Dollar7 Preferred Series Stock Dividends ConvertibleDollar7PreferredSeriesStockDividends	67000	usd
CY2021	msex	Incremental Common Shares Attributable To Conversion Of Dollar7 Preferred Series Stock IncrementalCommonSharesAttributableToConversionOfDollar7PreferredSeriesStock	115	shares
CY2020	msex	Convertible Dollar7 Preferred Series Stock Dividends ConvertibleDollar7PreferredSeriesStockDividends	67000	usd
CY2020	msex	Incremental Common Shares Attributable To Conversion Of Dollar7 Preferred Series Stock IncrementalCommonSharesAttributableToConversionOfDollar7PreferredSeriesStock	115	shares
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	42376000	usd
CY2022	msex	Adjusted Earnings Applicable To Common Stockin Shares AdjustedEarningsApplicableToCommonStockinShares	17712	shares
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	36490000	usd
CY2021	msex	Adjusted Earnings Applicable To Common Stockin Shares AdjustedEarningsApplicableToCommonStockinShares	17607	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	38372000	usd
CY2020	msex	Adjusted Earnings Applicable To Common Stockin Shares AdjustedEarningsApplicableToCommonStockinShares	17574	shares
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.39
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.18
CY2022	msex	Carrying Amount CarryingAmount	147269000	usd
CY2022Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	138756000	usd
CY2021	msex	Carrying Amount CarryingAmount	98828000	usd
CY2021Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	107781000	usd
CY2022	msex	Carrying Amounts CarryingAmounts	159100000	usd
CY2021	msex	Carrying Amounts CarryingAmounts	212300000	usd
CY2022Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21400000	usd
CY2021Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	23500000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	794000000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	100400000	usd
CY2022	msex	Schedule Of Pension Plan And Other Benefits Plan ScheduleOfPensionPlanAndOtherBenefitsPlan	<table cellpadding="0" cellspacing="0" style="border-collapse: collapse; width: 50%; font: 10pt Times New Roman, Times, Serif; margin-left: auto; margin-right: auto;"> <tr style="vertical-align: bottom"> <td style="white-space: nowrap"> </td><td style="font-weight: bold"> </td> <td colspan="7" style="text-align: center; white-space: nowrap; font-weight: bold">(Thousands of Dollars)</td></tr> <tr style="vertical-align: bottom"> <td style="white-space: nowrap"> </td><td style="border-bottom: Black 1pt solid"> </td> <td colspan="3" style="white-space: nowrap; text-align: center; border-bottom: Black 1pt solid"><p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 8.1pt; text-align: center"><b> </b></p><p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 8.1pt; text-align: center"><b>Pension<br/> Plan</b></p></td><td style="font-weight: bold; border-bottom: Black 1pt solid"> </td> <td colspan="3" style="white-space: nowrap; font-weight: bold; text-align: center; border-bottom: Black 1pt solid">Other<br/> Benefits Plan</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="width: 70%; text-align: left">Actuarial Loss (Gain)</td><td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td><td style="width: 12%; text-align: right">658</td><td style="white-space: nowrap; width: 1%; text-align: left"> </td><td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td><td style="width: 12%; text-align: right">(191</td><td style="white-space: nowrap; width: 1%; text-align: left">)</td></tr> </table><p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p>
CY2022Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.075	pure
CY2022Q4	msex	Increase Decrease In Annual Rate Per Capita Cost Of Covered Healthcare Benefits Years One To Three IncreaseDecreaseInAnnualRatePerCapitaCostOfCoveredHealthcareBenefitsYearsOneToThree	0.005	pure
CY2022Q4	msex	Increase Decrease In Annual Rate Per Capita Cost Of Covered Healthcare Benefits Years Four And Five IncreaseDecreaseInAnnualRatePerCapitaCostOfCoveredHealthcareBenefitsYearsFourAndFive	0.045	pure
CY2022	us-gaap	Other Postretirement Benefits Payments OtherPostretirementBenefitsPayments	1900000	usd
CY2022	msex	Number Of Hours Required To Participate In Contribution Plan NumberOfHoursRequiredToParticipateInContributionPlan	1000	pure
CY2022	msex	Percent Of Participants Contributions Matched By Company Below One Percent Of Participants Compensation PercentOfParticipantsContributionsMatchedByCompanyBelowOnePercentOfParticipantsCompensation	1	pure
CY2022	msex	Stock Based Compensation Remain Award Rate StockBasedCompensationRemainAwardRate	0.01	pure
CY2022	msex	Percent Of Participants Contributions Matched By Company Above One Percent Of Participants Compensation PercentOfParticipantsContributionsMatchedByCompanyAboveOnePercentOfParticipantsCompensation	0.50	pure
CY2022	msex	Threshold Percentage Of Participants Compensation At Which Matching Decreases ThresholdPercentageOfParticipantsCompensationAtWhichMatchingDecreases	0.01	pure
CY2022	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06	pure
CY2022	msex	Matching Contributions MatchingContributions	700000	usd
CY2021	msex	Matching Contributions MatchingContributions	700000	usd
CY2020	msex	Matching Contributions MatchingContributions	700000	usd
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	900000	usd
CY2022	msex	Defined Contribution Plan Employer Discretionary Contribution Percent DefinedContributionPlanEmployerDiscretionaryContributionPercent	0.05	pure
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	700000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	300000	shares
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.80	pure
CY2022	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	162434000	usd
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	143141000	usd
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	141592000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	47333000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	33211000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	37420000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	23029000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	21109000	usd
CY2020	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	18472000	usd
CY2022	us-gaap	Other Nonrecurring Income Expense OtherNonrecurringIncomeExpense	7703000	usd
CY2021	us-gaap	Other Nonrecurring Income Expense OtherNonrecurringIncomeExpense	5958000	usd
CY2020	us-gaap	Other Nonrecurring Income Expense OtherNonrecurringIncomeExpense	4379000	usd
CY2022	us-gaap	Interest Expense InterestExpense	9367000	usd
CY2021	us-gaap	Interest Expense InterestExpense	8114000	usd
CY2020	us-gaap	Interest Expense InterestExpense	7493000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3240000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5488000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4119000	usd
CY2022	msex	Consolidated Net Income ConsolidatedNetIncome	42429000	usd
CY2021	msex	Consolidated Net Income ConsolidatedNetIncome	36543000	usd
CY2020	msex	Consolidated Net Income ConsolidatedNetIncome	38425000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	91335000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	79378000	usd
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	105619000	usd
CY2022Q4	us-gaap	Assets Assets	1074450000	usd
CY2021Q4	us-gaap	Assets Assets	1020015000	usd
CY2022Q1	msex	Operating Revenues OperatingRevenues	36196000	usd
CY2022Q2	msex	Operating Revenues OperatingRevenues	39683000	usd
CY2022Q3	msex	Operating Revenues OperatingRevenues	47732000	usd
CY2022Q4	msex	Operating Revenues OperatingRevenues	38823000	usd
CY2022	msex	Operating Revenues OperatingRevenues	162434000	usd
CY2022Q1	us-gaap	Gain Loss On Sale Of Stock In Subsidiary Or Equity Method Investee GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee	5232000	usd
CY2022	us-gaap	Gain Loss On Sale Of Stock In Subsidiary Or Equity Method Investee GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee	5232000	usd
CY2022Q1	msex	Operating Incomein Dollars OperatingIncomeinDollars	12523000	usd
CY2022Q2	msex	Operating Incomein Dollars OperatingIncomeinDollars	10088000	usd
CY2022Q3	msex	Operating Incomein Dollars OperatingIncomeinDollars	16575000	usd
CY2022Q4	msex	Operating Incomein Dollars OperatingIncomeinDollars	8146000	usd
CY2022	msex	Operating Incomein Dollars OperatingIncomeinDollars	47332000	usd
CY2022Q1	us-gaap	Profit Loss ProfitLoss	12100000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	8868000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	14291000	usd
CY2022Q4	us-gaap	Profit Loss ProfitLoss	7169000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	42428000	usd
CY2022Q1	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.69
CY2022Q2	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.5
CY2022Q3	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.81
CY2022Q2	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.5
CY2022Q3	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.81
CY2022Q4	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.4
CY2022Q4	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.4
CY2022	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	2.4
CY2022	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	2.39
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.29
CY2022Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.29
CY2022Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.29
CY2022Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.3125
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.1825
CY2021Q1	msex	Operating Revenues OperatingRevenues	32541000	usd
CY2021Q2	msex	Operating Revenues OperatingRevenues	36701000	usd
CY2021Q3	msex	Operating Revenues OperatingRevenues	39874000	usd
CY2021Q4	msex	Operating Revenues OperatingRevenues	34025000	usd
CY2021	msex	Operating Revenues OperatingRevenues	143141000	usd
CY2021Q1	msex	Operating Incomein Dollars OperatingIncomeinDollars	5634000	usd
CY2021Q2	msex	Operating Incomein Dollars OperatingIncomeinDollars	9814000	usd
CY2021Q3	msex	Operating Incomein Dollars OperatingIncomeinDollars	11424000	usd
CY2021Q4	msex	Operating Incomein Dollars OperatingIncomeinDollars	6339000	usd
CY2021	msex	Operating Incomein Dollars OperatingIncomeinDollars	33211000	usd
CY2021Q1	us-gaap	Profit Loss ProfitLoss	6907000	usd
CY2021Q2	us-gaap	Profit Loss ProfitLoss	10923000	usd
CY2021Q3	us-gaap	Profit Loss ProfitLoss	11476000	usd
CY2021Q4	us-gaap	Profit Loss ProfitLoss	7237000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	36543000	usd
CY2021Q1	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.39
CY2021Q2	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.62
CY2021Q3	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.65
CY2021Q4	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	0.42
CY2021	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	2.08
CY2021Q1	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.39
CY2021Q2	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.62
CY2021Q3	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.65
CY2021Q4	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	0.41
CY2021	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	2.07
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2725
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2725
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2725
CY2021Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.29
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.1075
CY2022	dei	Auditor Firm AuditorFirmId	23
CY2021Q4	msex	Employee Benefit Plans EmployeeBenefitPlans		usd
CY2022Q4	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent		usd
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment		usd
CY2021	msex	Proceeds From Issuance Of Common Stock Expense ProceedsFromIssuanceOfCommonStockExpense		usd
CY2022	msex	Deobligated Principal Payments DeobligatedPrincipalPayments		usd
CY2021	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary		usd
CY2020	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary		usd
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000066004

Files In Submission

Name	View Source	Status
msex-20221231_lab.xml	Edgar Link	unprocessable
msex-20221231_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
0001174947-23-000258-index-headers.html	Edgar Link	pending
0001174947-23-000258-index.html	Edgar Link	pending
0001174947-23-000258.txt	Edgar Link	pending
0001174947-23-000258-xbrl.zip	Edgar Link	pending
ex10-27c.htm	Edgar Link	pending
ex21.htm	Edgar Link	pending
ex23-1.htm	Edgar Link	pending
ex31-1.htm	Edgar Link	pending
ex31.htm	Edgar Link	pending
ex32-1.htm	Edgar Link	pending
ex32.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
image_001.gif	Edgar Link	pending
image_001.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
msex-20221231.htm	Edgar Link	pending
msex-20221231.xsd	Edgar Link	pending
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
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R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
msex-20221231_cal.xml	Edgar Link	unprocessable
msex-20221231_def.xml	Edgar Link	unprocessable
msex-20221231_htm.xml	Edgar Link	completed
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
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R4.htm	Edgar Link	pending
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R65.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

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$MSEX
MIDDLESEX WATER CO Stock $msex

2023 Q1 Form 10-K Financial Statement

#000117494723000258 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX MIDDLESEX WATER CO Stock $msex

2023 Q1 Form 10-K Financial Statement

#000117494723000258 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX
MIDDLESEX WATER CO Stock $msex