$MSEX
MIDDLESEX WATER CO Stock $msex

$msex Overview Financials Valuation SEC Filings Company Website

2023 Q3 Form 10-Q Financial Statement

#000117494723000933 Filed on July 28, 2023

Income Statement

Concept	2023 Q3	2023 Q2
Revenue	$46.69M	$42.80M
YoY Change	-2.11%	7.86%
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	$6.376M	$7.342M
YoY Change	9.67%	29.49%
% of Gross Profit
Operating Expenses	$33.89M	$32.13M
YoY Change	8.78%	8.57%
Operating Profit	$12.82M	$10.67M
YoY Change	-22.64%	5.76%
Interest Expense	$3.518M	-$3.251M
YoY Change	49.38%	-237.23%
% of Operating Profit	27.44%	-30.47%
Other Income/Expense, Net	$1.432M	$1.290M
YoY Change	-29.77%	-33.64%
Pretax Income	$10.74M	$9.560M
YoY Change	-33.97%	-1.07%
Income Tax	$746.0K	-$341.0K
% Of Pretax Income	6.95%	-3.57%
Net Earnings	$9.990M	$9.871M
YoY Change	-30.1%	11.31%
Net Earnings / Revenue	21.4%	23.06%
Basic Earnings Per Share	$0.56	$0.56
Diluted Earnings Per Share	$0.56	$0.55
COMMON SHARES
Basic Shares Outstanding	17.75M shares	17.68M shares
Diluted Shares Outstanding	17.87M shares	17.83K shares

Balance Sheet

Concept	2023 Q3	2023 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$3.000M	$4.377M
YoY Change	3.16%	1.32%
Cash & Equivalents	$2.970M	$4.377M
Short-Term Investments
Other Short-Term Assets	$14.20M	$14.54M
YoY Change	-3.34%	1.2%
Inventory	$6.400M	$6.426M
Prepaid Expenses	$2.918M	$3.470M
Receivables	$18.99M	$15.23M
Other Receivables	$93.20M	$0.00
Total Short-Term Assets	$135.8M	$40.57M
YoY Change	227.36%	3.97%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.000B	$982.1M
YoY Change	9.32%	9.82%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$51.00K	$105.0M
YoY Change	-51.43%	113988.04%
Total Long-Term Assets	$1.108B	$1.087B
YoY Change	8.25%	8.81%
TOTAL ASSETS
Total Short-Term Assets	$135.8M	$40.57M
Total Long-Term Assets	$1.108B	$1.087B
Total Assets	$1.243B	$1.128B
YoY Change	16.79%	8.63%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$28.60M	$28.27M
YoY Change	10.56%	16.56%
Accrued Expenses	$3.100M	$3.698M
YoY Change	7.86%	29.53%
Deferred Revenue
YoY Change
Short-Term Debt	$42.30M	$23.50M
YoY Change	4.44%	-14.55%
Long-Term Debt Due	$7.444M	$17.46M
YoY Change	-1.63%	123.45%
Total Short-Term Liabilities	$121.3M	$87.56M
YoY Change	30.48%	11.08%
LONG-TERM LIABILITIES
Long-Term Debt	$354.3M	$350.4M
YoY Change	17.61%	14.75%
Other Long-Term Liabilities	$681.0K	$190.8M
YoY Change	-32.17%	17535.86%
Total Long-Term Liabilities	$355.0M	$541.3M
YoY Change	17.44%	76.6%
TOTAL LIABILITIES
Total Short-Term Liabilities	$121.3M	$87.56M
Total Long-Term Liabilities	$355.0M	$541.3M
Total Liabilities	$476.3M	$714.0M
YoY Change	20.51%	85.31%
SHAREHOLDERS EQUITY
Retained Earnings	$176.3M	$171.9M
YoY Change	6.45%	9.84%
Common Stock	$243.3M	$239.5M
YoY Change	4.66%	4.59%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$419.6M	$413.6M
YoY Change
Total Liabilities & Shareholders Equity	$1.243B	$1.128B
YoY Change	16.79%	8.63%

Cashflow Statement

Concept	2023 Q3	2023 Q2
OPERATING ACTIVITIES
Net Income	$9.990M	$9.871M
YoY Change	-30.1%	11.31%
Depreciation, Depletion And Amortization	$6.376M	$7.342M
YoY Change	9.67%	29.49%
Cash From Operating Activities	$10.70M	$13.32M
YoY Change	-38.43%	3.34%
INVESTING ACTIVITIES
Capital Expenditures	$22.43M	$26.12M
YoY Change	-15.66%	15.01%
Acquisitions
YoY Change
Other Investing Activities	$0.00	$0.00
YoY Change
Cash From Investing Activities	-$22.43M	-$26.12M
YoY Change	-15.66%	15.01%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	10.33M	12.32M
YoY Change	32.37%	13.51%
NET CHANGE
Cash From Operating Activities	10.70M	13.32M
Cash From Investing Activities	-22.43M	-26.12M
Cash From Financing Activities	10.33M	12.32M
Net Change In Cash	-1.400M	-485.0K
YoY Change	-0.85%	-147.27%
FREE CASH FLOW
Cash From Operating Activities	$10.70M	$13.32M
Capital Expenditures	$22.43M	$26.12M
Free Cash Flow	-$11.73M	-$12.80M
YoY Change	27.28%	30.3%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1		usd
CY2023Q2	msex	Preferred Shares Authorized PreferredSharesAuthorized		usd
CY2023Q2	msex	Preferred Stock Value1 PreferredStockValue1		usd
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2023-06-30
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	0-422
	dei	Entity Registrant Name EntityRegistrantName	MIDDLESEX WATER COMPANY
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-1114430
	dei	Entity Address Address Line1 EntityAddressAddressLine1	485C Route One South
	dei	Entity Address City Or Town EntityAddressCityOrTown	Iselin
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	08830
	dei	City Area Code CityAreaCode	(732)
	dei	Local Phone Number LocalPhoneNumber	634-1500
	dei	Security12b Title Security12bTitle	Common Stock
	dei	Trading Symbol TradingSymbol	MSEX
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity 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
CY2023Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17747758	shares
CY2023Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	42801000	usd
CY2022Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	39683000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	80957000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	75879000	usd
CY2023Q2	msex	Operations And Maintenance OperationsAndMaintenance	21204000	usd
CY2022Q2	msex	Operations And Maintenance OperationsAndMaintenance	19557000	usd
	msex	Operations And Maintenance OperationsAndMaintenance	41462000	usd
	msex	Operations And Maintenance OperationsAndMaintenance	38695000	usd
CY2023Q2	us-gaap	Depreciation Depreciation	6184000	usd
CY2022Q2	us-gaap	Depreciation Depreciation	5670000	usd
	us-gaap	Depreciation Depreciation	12170000	usd
	us-gaap	Depreciation Depreciation	11292000	usd
CY2023Q2	us-gaap	Taxes Other TaxesOther	4744000	usd
CY2022Q2	us-gaap	Taxes Other TaxesOther	4368000	usd
	us-gaap	Taxes Other TaxesOther	9168000	usd
	us-gaap	Taxes Other TaxesOther	8512000	usd
CY2023Q2	us-gaap	Operating Expenses OperatingExpenses	32132000	usd
CY2022Q2	us-gaap	Operating Expenses OperatingExpenses	29595000	usd
	us-gaap	Operating Expenses OperatingExpenses	62800000	usd
	us-gaap	Operating Expenses OperatingExpenses	58499000	usd
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	5232000	usd
CY2023Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10669000	usd
CY2022Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10088000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	18157000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	22612000	usd
CY2023Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	852000	usd
CY2022Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	548000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1665000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	926000	usd
CY2023Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1290000	usd
CY2022Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1396000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2188000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2773000	usd
CY2023Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2142000	usd
CY2022Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1944000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	3853000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	3699000	usd
CY2023Q2	us-gaap	Interest Expense InterestExpense	3251000	usd
CY2022Q2	us-gaap	Interest Expense InterestExpense	2369000	usd
	us-gaap	Interest Expense InterestExpense	5846000	usd
	us-gaap	Interest Expense InterestExpense	4219000	usd
CY2023Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9560000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9663000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16164000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	22092000	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-341000	usd
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	795000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	397000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1124000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9901000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	8868000	usd
	us-gaap	Net Income Loss NetIncomeLoss	15767000	usd
	us-gaap	Net Income Loss NetIncomeLoss	20968000	usd
CY2023Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
CY2022Q2	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
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9871000	usd
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8838000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15707000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20908000	usd
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.5
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.89
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.19
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.5
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.18
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17713	shares
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17583	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17683	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17560	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17828	shares
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17698	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17798	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17675	shares
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	287871000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	249153000	usd
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	768138000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	735138000	usd
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	99587000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	97581000	usd
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	36792000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	53570000	usd
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1192388000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1135442000	usd
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	225281000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	214891000	usd
CY2023Q2	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	967107000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	920551000	usd
CY2023Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4377000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3828000	usd
CY2023Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1889000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2326000	usd
CY2023Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	15230000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	16018000	usd
CY2023Q2	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	11067000	usd
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	8659000	usd
CY2023Q2	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	6426000	usd
CY2022Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	6177000	usd
CY2023Q2	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3470000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2624000	usd
CY2023Q2	us-gaap	Assets Current AssetsCurrent	40570000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	37306000	usd
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3499000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3826000	usd
CY2023Q2	msex	Preliminary Survey And Investigation Charges PreliminarySurveyAndInvestigationCharges	2270000	usd
CY2022Q4	msex	Preliminary Survey And Investigation Charges PreliminarySurveyAndInvestigationCharges	2806000	usd
CY2023Q2	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	92772000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	90046000	usd
CY2023Q2	msex	Non Utility Assets Net NonUtilityAssetsNet	11449000	usd
CY2022Q4	msex	Non Utility Assets Net NonUtilityAssetsNet	11207000	usd
CY2023Q2	msex	Employee Benefit Plans EmployeeBenefitPlans	9898000	usd
CY2022Q4	msex	Employee Benefit Plans EmployeeBenefitPlans	8689000	usd
CY2023Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	21000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	19000	usd
CY2023Q2	msex	Deferred Charges And Other Assets DeferredChargesAndOtherAssets	119909000	usd
CY2022Q4	msex	Deferred Charges And Other Assets DeferredChargesAndOtherAssets	116593000	usd
CY2023Q2	us-gaap	Assets Assets	1127586000	usd
CY2022Q4	us-gaap	Assets Assets	1074450000	usd
CY2023Q2	us-gaap	Common Stock Value CommonStockValue	239545000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	233054000	usd
CY2023Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	171932000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	167274000	usd
CY2023Q2	msex	Total Common Equity TotalCommonEquity	411477000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2023Q2	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2023Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	350446000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	290280000	usd
CY2023Q2	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	764007000	usd
CY2022Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	692692000	usd
CY2023Q2	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	17460000	usd
CY2022Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	17462000	usd
CY2023Q2	us-gaap	Notes Payable Current NotesPayableCurrent	23500000	usd
CY2022Q4	us-gaap	Notes Payable Current NotesPayableCurrent	55500000	usd
CY2023Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	28265000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	24847000	usd
CY2023Q2	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	10339000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12162000	usd
CY2023Q2	us-gaap	Interest Payable Current InterestPayableCurrent	3098000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2535000	usd
CY2023Q2	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	1476000	usd
CY2022Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	1365000	usd
CY2023Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3425000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3988000	usd
CY2023Q2	us-gaap	Liabilities Current LiabilitiesCurrent	87563000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	117859000	usd
CY2023Q2	msex	Construction Advances ConstructionAdvances	21032000	usd
CY2022Q4	msex	Construction Advances ConstructionAdvances	21382000	usd
CY2023Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3382000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3706000	usd
CY2023Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	85196000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	77783000	usd
CY2023Q2	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	47400000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	46734000	usd
CY2023Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	758000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	919000	usd
CY2023Q2	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	157768000	usd
CY2022Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	150524000	usd
CY2023Q2	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	118248000	usd
CY2022Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	113375000	usd
CY2023Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1127586000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1074450000	usd
	us-gaap	Net Income Loss NetIncomeLoss	15767000	usd
	us-gaap	Net Income Loss NetIncomeLoss	20968000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	14543000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	13401000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2993000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3256000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1014000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	532000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	207000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-445000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1366000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	909000	usd
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	5232000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-788000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-682000	usd
	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	2408000	usd
	msex	Change In Unbilled Revenues ChangeInUnbilledRevenues	3016000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	249000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	349000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	846000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	1195000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3418000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3124000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	843000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	3893000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	563000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	170000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-975000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1310000	usd
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	111000	usd
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	165000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-580000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2006000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	29287000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	26861000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	651000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	394000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	50635000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	39343000	usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3122000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-50635000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-36221000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2553000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2162000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	62880000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2287000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-32000000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	14500000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	107000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	82000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5745000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	7039000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11049000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	10184000	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	-959000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1191000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	21897000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	10147000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	549000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	787000	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
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	4377000	usd
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	4320000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	4219000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	4321000	usd
	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary	2100000	usd
	us-gaap	Interest Paid Net InterestPaidNet	5491000	usd
	us-gaap	Interest Paid Net InterestPaidNet	4245000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	651000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	394000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	260000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	575000	usd
CY2023Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000	shares
CY2023Q2	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	17729	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	17642	shares
	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	239545000	usd
CY2022	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	233054000	usd
CY2023Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	171932000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	167274000	usd
CY2023Q2	msex	Total Common Equity TotalCommonEquity	411477000	usd
CY2022Q4	msex	Total Common Equity TotalCommonEquity	400328000	usd
CY2023Q2	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2022Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2023Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	20	shares
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2022	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2023Q2	us-gaap	Long Term Debt LongTermDebt	366712000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	306387000	usd
CY2023Q2	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	6675000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	6873000	usd
CY2023Q2	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	5481000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	5518000	usd
CY2023Q2	us-gaap	Long Term Debt Current LongTermDebtCurrent	17460000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	17462000	usd
CY2023Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	350446000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	290280000	usd
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	377882000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	8868000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	4134000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-469000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	280000	usd
CY2022Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5097000	usd
CY2022Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	385568000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	367726000	usd
	us-gaap	Net Income Loss NetIncomeLoss	20968000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	7039000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-201000	usd
	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	280000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	10184000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	60000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	385568000	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 Other StockIssuedDuringPeriodValueOther	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
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	400328000	usd
	us-gaap	Net Income Loss NetIncomeLoss	15767000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	5745000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	386000	usd
	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	360000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11049000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	60000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	411477000	usd
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1000000	shares
CY2023Q1	msex	Percentage Of Discount Purchase Of Common Stock In Investment Plan PercentageOfDiscountPurchaseOfCommonStockInInvestmentPlan	0.03	pure
CY2023Q1	msex	Number Of Shares Offering For Discount NumberOfSharesOfferingForDiscount	200000	shares
CY2023Q2	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	700000	shares
CY2023Q2	msex	Borrowed Loan BorrowedLoan	20000000	usd
CY2023Q2	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.0571	pure
CY2023Q2	msex	Maturity Date MaturityDate	2033
CY2023Q2	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2023-06-30
CY2023Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	1300000	usd
CY2021Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	1000000	usd
CY2023Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	4200000	usd
	msex	Carrying Amount CarryingAmount	146496000	usd
CY2023Q2	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	141748000	usd
CY2022	msex	Carrying Amount CarryingAmount	147269000	usd
CY2022Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	138756000	usd
CY2023Q2	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	220200000	usd
CY2022Q4	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	159100000	usd
CY2023Q2	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21000000	usd
CY2022Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21400000	usd
CY2023Q2	us-gaap	Preferred Stock Convertible Conversion Price PreferredStockConvertibleConversionPrice	7
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	pure
CY2023Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	42801000	usd
CY2022Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	39683000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	80957000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	75879000	usd
CY2023Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10669000	usd
CY2022Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10088000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	18157000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	22612000	usd
CY2023Q2	msex	Consolidated Net Income ConsolidatedNetIncome	9901000	usd
CY2022Q2	msex	Consolidated Net Income ConsolidatedNetIncome	8868000	usd
	msex	Consolidated Net Income ConsolidatedNetIncome	15767000	usd
	msex	Consolidated Net Income ConsolidatedNetIncome	20968000	usd
CY2023Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26120000	usd
CY2022Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	22712000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	50635000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	39343000	usd
CY2023Q2	us-gaap	Assets Assets	1127586000	usd
CY2022Q4	us-gaap	Assets Assets	1074450000	usd
CY2023Q2	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	140000000	usd
CY2023Q2	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	23500000	usd
CY2023Q2	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	116500000	usd
CY2023Q2	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	140000000	usd
CY2023Q2	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	24220	usd
CY2022Q2	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	20527	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	36848	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	17006	usd
CY2023Q2	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0609	pure
CY2022Q2	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0188	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0575	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0158	pure
CY2023Q2	us-gaap	Line Of Credit Facility Fair Value Of Amount Outstanding LineOfCreditFacilityFairValueOfAmountOutstanding	23500000	usd
CY2023Q2	msex	Cost Of Treated Water CostOfTreatedWater	1363000	usd
CY2022Q2	msex	Cost Of Treated Water CostOfTreatedWater	785000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	2747000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	1531000	usd
CY2023Q2	msex	Cost Of Untreated Water CostOfUntreatedWater	739000	usd
CY2022Q2	msex	Cost Of Untreated Water CostOfUntreatedWater	739000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	1540000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	1550000	usd
CY2023Q2	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	2102000	usd
CY2022Q2	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	1524000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	4287000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	3081000	usd
CY2023Q2	msex	Estimated Incremental Borrowing Rate EstimatedIncrementalBorrowingRate	0.0403	pure
CY2023Q1	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
CY2022Q1	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	400000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	400000	usd
CY2023Q2	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2022Q4	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2023Q2	msex	Right Of Use Assets Accumulated Amortization RightOfUseAssetsAccumulatedAmortization	3800000	usd
CY2022Q4	msex	Right Of Use Assets Accumulated Amortization RightOfUseAssetsAccumulatedAmortization	3500000	usd
CY2023Q2	msex	Right Of Use Assets Current RightOfUseAssetsCurrent	3500000	usd
CY2022Q4	msex	Right Of Use Assets Current RightOfUseAssetsCurrent	3800000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	400000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	800000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	800000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	900000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	900000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1800000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	5600000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1600000	usd
CY2023Q2	msex	Operating Lease Liability1 OperatingLeaseLiability1	4000000	usd
CY2023Q2	msex	Operating Lease Liability Current1 OperatingLeaseLiabilityCurrent1	600000	usd
CY2023Q2	msex	Noncurrent Leases Liability NoncurrentLeasesLiability	3400000	usd
	msex	Budgeted Construction Cost BudgetedConstructionCost	101000000	usd
	msex	Estimatedobligationexpenditure Estimatedobligationexpenditure	13000000	usd
CY2023Q2	msex	Residential Operating Revenues ResidentialOperatingRevenues	22653000	usd
CY2022Q2	msex	Residential Operating Revenues ResidentialOperatingRevenues	21508000	usd
	msex	Residential Operating Revenues ResidentialOperatingRevenues	41657000	usd
	msex	Residential Operating Revenues ResidentialOperatingRevenues	40659000	usd
CY2023Q2	msex	Commercial Operating Revenues CommercialOperatingRevenues	6249000	usd
CY2022Q2	msex	Commercial Operating Revenues CommercialOperatingRevenues	5203000	usd
	msex	Commercial Operating Revenues CommercialOperatingRevenues	11627000	usd
	msex	Commercial Operating Revenues CommercialOperatingRevenues	9630000	usd
CY2023Q2	msex	Industrial Operating Revenues IndustrialOperatingRevenues	2806000	usd
CY2022Q2	msex	Industrial Operating Revenues IndustrialOperatingRevenues	2700000	usd
	msex	Industrial Operating Revenues IndustrialOperatingRevenues	5645000	usd
	msex	Industrial Operating Revenues IndustrialOperatingRevenues	5295000	usd
CY2023Q2	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	3145000	usd
CY2022Q2	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	3173000	usd
	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	6249000	usd
	msex	Residential Commercial Industrial And Fire Protection Revenue ResidentialCommercialIndustrialAndFireProtectionRevenue	6294000	usd
CY2023Q2	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	4968000	usd
CY2022Q2	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	4297000	usd
	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	9521000	usd
	msex	Wholesale Municipal Revenue WholesaleMunicipalRevenue	8260000	usd
CY2023Q2	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	2942000	usd
CY2022Q2	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	2765000	usd
	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	6172000	usd
	msex	Nonregualted Contract Operations Revenue NonregualtedContractOperationsRevenue	5665000	usd
CY2023Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	42763000	usd
CY2022Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	39646000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	80871000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	75803000	usd
CY2023Q2	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	88000	usd
CY2022Q2	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	156000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	163000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	223000	usd
CY2023Q2	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	114000	usd
CY2022Q2	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	110000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	226000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	220000	usd
CY2023Q2	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-164000	usd
CY2022Q2	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-229000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-303000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-367000	usd
CY2023Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	42801000	usd
CY2022Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	39683000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	80957000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	75879000	usd
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary		usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment		usd
	msex	Non Cash Consideration For Sale Of Subsidiary NonCashConsiderationForSaleOfSubsidiary		usd
CY2022	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1		usd
CY2022Q4	msex	Preferred Shares Authorized PreferredSharesAuthorized		usd
CY2022Q4	msex	Preferred Stock Value1 PreferredStockValue1		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
0001174947-23-000933-index-headers.html	Edgar Link	pending
0001174947-23-000933-index.html	Edgar Link	pending
0001174947-23-000933.txt	Edgar Link	pending
0001174947-23-000933-xbrl.zip	Edgar Link	pending
ex10-26e.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
image_002.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
msex-20230630.htm	Edgar Link	pending
msex-20230630.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
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
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R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
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R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
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R3.htm	Edgar Link	pending
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R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
msex-20230630_def.xml	Edgar Link	unprocessable
msex-20230630_cal.xml	Edgar Link	unprocessable
msex-20230630_lab.xml	Edgar Link	unprocessable
msex-20230630_pre.xml	Edgar Link	unprocessable
msex-20230630_htm.xml	Edgar Link	completed
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.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
FilingSummary.xml	Edgar Link	unprocessable

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$MSEX
MIDDLESEX WATER CO Stock $msex

2023 Q3 Form 10-Q Financial Statement

#000117494723000933 Filed on July 28, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX MIDDLESEX WATER CO Stock $msex

2023 Q3 Form 10-Q Financial Statement

#000117494723000933 Filed on July 28, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX
MIDDLESEX WATER CO Stock $msex