$NWN
Northwest Natural Holding Co Stock $nwn

$nwn Overview Financials Valuation SEC Filings Company Website

2023 Q2 Form 10-Q Financial Statement

#000173399823000016 Filed on May 04, 2023

Income Statement

Concept	2023 Q2	2023 Q1
Revenue	$237.9M	$462.4M
YoY Change	22.0%	32.01%
Cost Of Revenue	$111.6M	$224.8M
YoY Change	26.9%	41.42%
Gross Profit	$126.2M	$237.6M
YoY Change	17.98%	24.19%
Gross Profit Margin	53.07%	51.39%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$31.29M	$31.47M
YoY Change	11.32%	10.68%
% of Gross Profit	24.79%	13.24%
Operating Expenses	$112.4M	$348.9M
YoY Change	-38.05%	32.84%
Operating Profit	$13.84M	$113.5M
YoY Change	2.25%	29.52%
Interest Expense	-$18.97M	-$18.30M
YoY Change	63.85%	58.79%
% of Operating Profit	-137.07%	-16.12%
Other Income/Expense, Net	$6.618M	$1.606M
YoY Change	2828.32%	-268.34%
Pretax Income	$1.487M	$96.82M
YoY Change	-31.95%	28.81%
Income Tax	$243.0K	$25.15M
% Of Pretax Income	16.34%	25.97%
Net Earnings	$1.244M	$71.67M
YoY Change	-27.46%	27.44%
Net Earnings / Revenue	0.52%	15.5%
Basic Earnings Per Share	$0.03	$2.01
Diluted Earnings Per Share	$0.03	$2.01
COMMON SHARES
Basic Shares Outstanding	35.97M shares	35.54M shares
Diluted Shares Outstanding	36.06M shares	35.71M shares

Balance Sheet

Concept	2023 Q2	2023 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$137.8M	$140.8M
YoY Change	700.51%	478.91%
Cash & Equivalents	$137.8M	$140.8M
Short-Term Investments
Other Short-Term Assets	$182.0M	$41.97M
YoY Change	404.61%	-0.85%
Inventory	$67.50M	$41.39M
Prepaid Expenses
Receivables	$70.63M	$157.4M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$457.9M	$576.2M
YoY Change	27.9%	47.22%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.415B	$3.156B
YoY Change	14.64%	8.65%
Goodwill	$152.7M	$149.8M
YoY Change	115.98%	112.18%
Intangibles
YoY Change
Long-Term Investments	$104.3M	$93.61M
YoY Change	8.65%	-2.76%
Other Assets	$406.9M	$97.79M
YoY Change	437.58%	30.52%
Total Long-Term Assets	$4.079B	$4.016B
YoY Change	8.99%	9.63%
TOTAL ASSETS
Total Short-Term Assets	$457.9M	$576.2M
Total Long-Term Assets	$4.079B	$4.016B
Total Assets	$4.537B	$4.592B
YoY Change	10.64%	13.26%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$101.4M	$111.2M
YoY Change	-25.11%	-14.86%
Accrued Expenses	$13.18M	$14.79M
YoY Change	50.74%	21.33%
Deferred Revenue
YoY Change
Short-Term Debt	$41.00M	$72.50M
YoY Change	-81.59%	-78.2%
Long-Term Debt Due	$240.7M	$240.7M
YoY Change	68479.49%	70906.49%
Total Short-Term Liabilities	$570.9M	$644.1M
YoY Change	5.87%	-2.16%
LONG-TERM LIABILITIES
Long-Term Debt	$1.295B	$1.295B
YoY Change	23.82%	23.92%
Other Long-Term Liabilities	$1.051B	$118.0M
YoY Change	840.75%	4.64%
Total Long-Term Liabilities	$2.345B	$1.413B
YoY Change	102.68%	22.05%
TOTAL LIABILITIES
Total Short-Term Liabilities	$570.9M	$644.1M
Total Long-Term Liabilities	$2.345B	$1.413B
Total Liabilities	$3.296B	$2.057B
YoY Change	94.3%	13.27%
SHAREHOLDERS EQUITY
Retained Earnings	$414.4M	$430.6M
YoY Change	8.49%	8.53%
Common Stock	$831.1M	$824.3M
YoY Change	8.25%	36.84%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.240B	$1.248B
YoY Change
Total Liabilities & Shareholders Equity	$4.537B	$4.592B
YoY Change	10.64%	13.26%

Cashflow Statement

Concept	2023 Q2	2023 Q1
OPERATING ACTIVITIES
Net Income	$1.244M	$71.67M
YoY Change	-27.46%	27.44%
Depreciation, Depletion And Amortization	$31.29M	$31.47M
YoY Change	11.32%	10.68%
Cash From Operating Activities	$121.0M	$176.9M
YoY Change	117.9%	25.4%
INVESTING ACTIVITIES
Capital Expenditures	$73.60M	$71.27M
YoY Change	-174.2%	-204.02%
Acquisitions		$468.0K
YoY Change
Other Investing Activities	-$4.924M	$1.285M
YoY Change	552.19%	-10.2%
Cash From Investing Activities	-$78.52M	-$73.02M
YoY Change	-21.43%	4.69%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net		$0.00
YoY Change
Cash From Financing Activities	-43.38M	$11.19M
YoY Change	-211.8%	-117.82%
NET CHANGE
Cash From Operating Activities	121.0M	$176.9M
Cash From Investing Activities	-78.52M	-$73.02M
Cash From Financing Activities	-43.38M	$11.19M
Net Change In Cash	-911.0K	$115.0M
YoY Change	-83.76%	1249.64%
FREE CASH FLOW
Cash From Operating Activities	$121.0M	$176.9M
Capital Expenditures	$73.60M	$71.27M
Free Cash Flow	$47.40M	$105.6M
YoY Change	-69.37%	-49.61%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2023Q1	dei	Amendment Flag AmendmentFlag	false
CY2023Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001733998
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P9M
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P0Y
CY2023Q1	dei	Document Type DocumentType	10-Q
CY2023Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2023Q1	dei	Document Period End Date DocumentPeriodEndDate	2023-03-31
CY2023Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2023Q1	dei	Entity Registrant Name EntityRegistrantName	NORTHWEST NATURAL HOLDING COMPANY
CY2023Q1	dei	Entity File Number EntityFileNumber	1-38681
CY2023Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	OR
CY2023Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	82-4710680
CY2023Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	250 SW Taylor Street
CY2023Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Portland
CY2023Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	OR
CY2023Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	97204
CY2023Q1	dei	City Area Code CityAreaCode	(503)
CY2023Q1	dei	Local Phone Number LocalPhoneNumber	226-4211
CY2023Q1	dei	Security12b Title Security12bTitle	Common Stock
CY2023Q1	dei	Trading Symbol TradingSymbol	NWN
CY2023Q1	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2023Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023Q1	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	35965613	shares
CY2023Q1	us-gaap	Revenues Revenues	462423000	usd
CY2022Q1	us-gaap	Revenues Revenues	350301000	usd
CY2023Q1	us-gaap	Utilities Operating Expense Gas And Petroleum Purchased UtilitiesOperatingExpenseGasAndPetroleumPurchased	205749000	usd
CY2022Q1	us-gaap	Utilities Operating Expense Gas And Petroleum Purchased UtilitiesOperatingExpenseGasAndPetroleumPurchased	145588000	usd
CY2023Q1	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	71817000	usd
CY2022Q1	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	57485000	usd
CY2023Q1	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	5375000	usd
CY2022Q1	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	4703000	usd
CY2023Q1	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	14219000	usd
CY2022Q1	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	12104000	usd
CY2023Q1	nwn	Excise Taxes ExciseTaxes	19042000	usd
CY2022Q1	nwn	Excise Taxes ExciseTaxes	13360000	usd
CY2023Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	31465000	usd
CY2022Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	28429000	usd
CY2023Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1248000	usd
CY2022Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	994000	usd
CY2023Q1	us-gaap	Operating Expenses OperatingExpenses	348915000	usd
CY2022Q1	us-gaap	Operating Expenses OperatingExpenses	262663000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	113508000	usd
CY2022Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	87638000	usd
CY2023Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1606000	usd
CY2022Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-954000	usd
CY2023Q1	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-18296000	usd
CY2022Q1	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-11522000	usd
CY2023Q1	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	96818000	usd
CY2022Q1	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	75162000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25147000	usd
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18923000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	71671000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	56239000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	37000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	71000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	102000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	197000	usd
CY2023Q1	nwn	Unrealized Loss On Derivative Tax UnrealizedLossOnDerivativeTax	-149	usd
CY2023Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-411000	usd
CY2022Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	usd
CY2023Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	71362000	usd
CY2022Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	56436000	usd
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35609000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	31187000	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35708000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	31212000	shares
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.01
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.01
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	140821000	usd
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	24325000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29270000	usd
CY2023Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	164157000	usd
CY2022Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	103131000	usd
CY2022Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	168906000	usd
CY2023Q1	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	59542000	usd
CY2022Q1	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	41772000	usd
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	89048000	usd
CY2023Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	6760000	usd
CY2022Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2488000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3296000	usd
CY2023Q1	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	126546000	usd
CY2022Q1	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	64481000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	117491000	usd
CY2023Q1	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	8507000	usd
CY2022Q1	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	84438000	usd
CY2022Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	194412000	usd
CY2023Q1	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	41392000	usd
CY2022Q1	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	33377000	usd
CY2022Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	87096000	usd
CY2023Q1	us-gaap	Other Assets Current OtherAssetsCurrent	41968000	usd
CY2022Q1	us-gaap	Other Assets Current OtherAssetsCurrent	42329000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	61286000	usd
CY2023Q1	us-gaap	Assets Current AssetsCurrent	576173000	usd
CY2022Q1	us-gaap	Assets Current AssetsCurrent	391365000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	744213000	usd
CY2023Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4320476000	usd
CY2022Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4041894000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4261566000	usd
CY2023Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1164498000	usd
CY2022Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1137138000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1147166000	usd
CY2023Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3155978000	usd
CY2022Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2904756000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3114400000	usd
CY2023Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	311419000	usd
CY2022Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	297546000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	340432000	usd
CY2023Q1	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	1432000	usd
CY2022Q1	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	6955000	usd
CY2022Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	5045000	usd
CY2023Q1	us-gaap	Other Long Term Investments OtherLongTermInvestments	93611000	usd
CY2022Q1	us-gaap	Other Long Term Investments OtherLongTermInvestments	96266000	usd
CY2022Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	95704000	usd
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	72699000	usd
CY2022Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	74416000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	73429000	usd
CY2023Q1	us-gaap	Net Investment In Lease Noncurrent NetInvestmentInLeaseNoncurrent	133159000	usd
CY2022Q1	us-gaap	Net Investment In Lease Noncurrent NetInvestmentInLeaseNoncurrent	137837000	usd
CY2022Q4	us-gaap	Net Investment In Lease Noncurrent NetInvestmentInLeaseNoncurrent	134302000	usd
CY2023Q1	us-gaap	Goodwill Goodwill	149836000	usd
CY2022Q1	us-gaap	Goodwill Goodwill	70570000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	149283000	usd
CY2023Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	97789000	usd
CY2022Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	74923000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	91518000	usd
CY2023Q1	us-gaap	Assets Noncurrent AssetsNoncurrent	4015923000	usd
CY2022Q1	us-gaap	Assets Noncurrent AssetsNoncurrent	3663269000	usd
CY2022Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	4004113000	usd
CY2023Q1	us-gaap	Assets Assets	4592096000	usd
CY2022Q1	us-gaap	Assets Assets	4054634000	usd
CY2022Q4	us-gaap	Assets Assets	4748326000	usd
CY2023Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	72500000	usd
CY2022Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	332500000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	258200000	usd
CY2023Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	240712000	usd
CY2022Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	339000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	90697000	usd
CY2023Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	111152000	usd
CY2022Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	130557000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	180667000	usd
CY2023Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	31372000	usd
CY2022Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	14258000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	15625000	usd
CY2023Q1	us-gaap	Interest Payable Current InterestPayableCurrent	13089000	usd
CY2022Q1	us-gaap	Interest Payable Current InterestPayableCurrent	10886000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	10169000	usd
CY2023Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	57523000	usd
CY2022Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	111791000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	248582000	usd
CY2023Q1	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	44370000	usd
CY2022Q1	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	3855000	usd
CY2022Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	28728000	usd
CY2023Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1700000	usd
CY2022Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1303000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1514000	usd
CY2023Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	71662000	usd
CY2022Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	52778000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	64552000	usd
CY2023Q1	us-gaap	Liabilities Current LiabilitiesCurrent	644080000	usd
CY2022Q1	us-gaap	Liabilities Current LiabilitiesCurrent	658267000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	898734000	usd
CY2023Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1294590000	usd
CY2022Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1044667000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1246167000	usd
CY2023Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	376237000	usd
CY2022Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	353746000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	366022000	usd
CY2023Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	669328000	usd
CY2022Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	652977000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	689578000	usd
CY2023Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	147890000	usd
CY2022Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	164530000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	149143000	usd
CY2023Q1	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	15382000	usd
CY2022Q1	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	592000	usd
CY2022Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	20838000	usd
CY2023Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78302000	usd
CY2022Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	79162000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78965000	usd
CY2023Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	117980000	usd
CY2022Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	112749000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	123438000	usd
CY2023Q1	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	1405119000	usd
CY2022Q1	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	1363756000	usd
CY2022Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	1427984000	usd
CY2023Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2023Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2022Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2022Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2023Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2023Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35929000	shares
CY2023Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35929000	shares
CY2022Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	31380000	shares
CY2022Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	31380000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35525000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35525000	shares
CY2023Q1	us-gaap	Common Stock Value CommonStockValue	824304000	usd
CY2022Q1	us-gaap	Common Stock Value CommonStockValue	602382000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	805253000	usd
CY2023Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	430597000	usd
CY2022Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	396769000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	376473000	usd
CY2023Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6594000	usd
CY2022Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11207000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6285000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	1248307000	usd
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	987944000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1175441000	usd
CY2023Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4592096000	usd
CY2022Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4054634000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4748326000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1175441000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	935146000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1248307000	usd
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	987944000	usd
CY2023Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.4850
CY2022Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.4825
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	71671000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	56239000	usd
CY2023Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	31465000	usd
CY2022Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	28429000	usd
CY2023Q1	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	833000	usd
CY2022Q1	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	1481000	usd
CY2023Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	5228000	usd
CY2022Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	8780000	usd
CY2023Q1	us-gaap	Pension Expense PensionExpense	-791000	usd
CY2022Q1	us-gaap	Pension Expense PensionExpense	1441000	usd
CY2023Q1	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-4113000	usd
CY2022Q1	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-4345000	usd
CY2023Q1	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	5375000	usd
CY2022Q1	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	4703000	usd
CY2023Q1	nwn	Asset Optimization Revenue Sharing Bill Credits AssetOptimizationRevenueSharingBillCredits	-10471000	usd
CY2022Q1	nwn	Asset Optimization Revenue Sharing Bill Credits AssetOptimizationRevenueSharingBillCredits	-41102000	usd
CY2023Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-8509000	usd
CY2022Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-6325000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-38727000	usd
CY2022Q1	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-38664000	usd
CY2023Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-46129000	usd
CY2022Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-23885000	usd
CY2023Q1	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	25567000	usd
CY2022Q1	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	14436000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-47773000	usd
CY2022Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-16487000	usd
CY2023Q1	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	11300000	usd
CY2022Q1	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	-11728000	usd
CY2023Q1	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-7769000	usd
CY2022Q1	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	646000	usd
CY2023Q1	nwn	Change In Decoupling Regulatory Deferral ChangeInDecouplingRegulatoryDeferral	1303000	usd
CY2022Q1	nwn	Change In Decoupling Regulatory Deferral ChangeInDecouplingRegulatoryDeferral	-4434000	usd
CY2023Q1	nwn	Increase Decrease In Cloud Based Software Operating Assets IncreaseDecreaseInCloudBasedSoftwareOperatingAssets	3673000	usd
CY2022Q1	nwn	Increase Decrease In Cloud Based Software Operating Assets IncreaseDecreaseInCloudBasedSoftwareOperatingAssets	416000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-15012000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3488000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	176861000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	141037000	usd
CY2023Q1	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	71265000	usd
CY2022Q1	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	68514000	usd
CY2023Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	468000	usd
CY2022Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2023Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1285000	usd
CY2022Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1236000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-73018000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-69750000	usd
CY2023Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	16669000	usd
CY2022Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	9938000	usd
CY2023Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	200000000	usd
CY2022Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2023Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-185700000	usd
CY2022Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-57000000	usd
CY2023Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16532000	usd
CY2022Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	14452000	usd
CY2023Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3250000	usd
CY2022Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1250000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	11187000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-62764000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	115030000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	8523000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40964000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27120000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	155994000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35643000	usd
CY2023Q1	us-gaap	Interest Paid Net InterestPaidNet	14904000	usd
CY2022Q1	us-gaap	Interest Paid Net InterestPaidNet	7977000	usd
CY2023Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1300000	usd
CY2022Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	773000	usd
CY2023Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	311419000	usd
CY2022Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	297546000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	340432000	usd
CY2023Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	57523000	usd
CY2022Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	111791000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	248582000	usd
CY2023Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	669328000	usd
CY2022Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	652977000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	689578000	usd
CY2023Q1	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	112600000	usd
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	140821000	usd
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	24325000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29270000	usd
CY2023Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	15173000	usd
CY2022Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	11318000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	11694000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	155994000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35643000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40964000	usd
CY2023Q1	nwn	Inactive Account Period Outstanding Prior To Write Off InactiveAccountPeriodOutstandingPriorToWriteOff	P120D
CY2023Q1	nwn	General Payment Term Of Ngd Receivables GeneralPaymentTermOfNGDReceivables	P15D
CY2023Q1	nwn	Age Of Closed Or Inactive Accounts AgeOfClosedOrInactiveAccounts	P120D
CY2023Q1	nwn	Number Of Net Investments In Sales Type Leases NumberOfNetInvestmentsInSalesTypeLeases	2	numberofleases
CY2023Q1	us-gaap	Sales Type Lease Net Investment In Lease Allowance For Credit Loss SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss	0	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	71671000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	56239000	usd
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35609000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	31187000	shares
CY2023Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	99000	shares
CY2022Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	25000	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35708000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	31212000	shares
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.01
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.01
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
CY2023Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1000	shares
CY2022Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5000	shares
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	76100000	usd
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	15000000	usd
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	16200000	usd
CY2022Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	2875000	shares
CY2022Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	138600000	usd
CY2023Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	466777000	usd
CY2023Q1	us-gaap	Revenues Revenues	462423000	usd
CY2022Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	346829000	usd
CY2022Q1	us-gaap	Revenues Revenues	350301000	usd
CY2023Q1	us-gaap	Lessor Sales Type Lease Term Of Contract1 LessorSalesTypeLeaseTermOfContract1	P30Y
CY2023Q1	us-gaap	Lessor Sales Type Lease Renewal Term1 LessorSalesTypeLeaseRenewalTerm1	P50Y
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	13500000	usd
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	9400000	usd
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	5100000	usd
CY2023Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	16900000	usd
CY2023Q1	us-gaap	Lessor Sales Type Lease Term Of Contract1 LessorSalesTypeLeaseTermOfContract1	P30Y
CY2023Q1	us-gaap	Lessor Sales Type Lease Renewal Term1 LessorSalesTypeLeaseRenewalTerm1	P50Y
CY2023Q1	us-gaap	Lease Income LeaseIncome	200000	usd
CY2022Q1	us-gaap	Lease Income LeaseIncome	100000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	504000	usd
CY2023Q1	nwn	Lease Paymentstobe Received Remainderof Fiscal Year LeasePaymentstobeReceivedRemainderofFiscalYear	12880000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	665000	usd
CY2023Q1	nwn	Lease Paymentstobe Received Two Years LeasePaymentstobeReceivedTwoYears	16532000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	657000	usd
CY2023Q1	nwn	Lease Paymentstobe Received Three Years LeasePaymentstobeReceivedThreeYears	15963000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	92000	usd
CY2023Q1	nwn	Lease Paymentstobe Received Four Years LeasePaymentstobeReceivedFourYears	14993000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	79000	usd
CY2023Q1	nwn	Lease Paymentstobe Received Five Years LeasePaymentstobeReceivedFiveYears	14600000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	857000	usd
CY2023Q1	nwn	Lease Paymentstobe Received Thereafter LeasePaymentstobeReceivedThereafter	223156000	usd
CY2023Q1	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	2854000	usd
CY2023Q1	nwn	Lease Paymentstobe Received LeasePaymentstobeReceived	298124000	usd
CY2023Q1	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	5200000	usd
CY2022Q1	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	4800000	usd
CY2022Q4	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	5100000	usd
CY2023Q1	nwn	Lessee Operating Lease Maximum Term Of Short Term Leases Not Recorded On The Balance Sheet LesseeOperatingLeaseMaximumTermOfShortTermLeasesNotRecordedOnTheBalanceSheet	P12M
CY2023Q1	us-gaap	Operating Lease Expense OperatingLeaseExpense	1815000	usd
CY2022Q1	us-gaap	Operating Lease Expense OperatingLeaseExpense	1734000	usd
CY2023Q1	us-gaap	Short Term Lease Cost ShortTermLeaseCost	80000	usd
CY2022Q1	us-gaap	Short Term Lease Cost ShortTermLeaseCost	163000	usd
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	72699000	usd
CY2022Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	74416000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	73429000	usd
CY2023Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1700000	usd
CY2022Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1303000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1514000	usd
CY2023Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78302000	usd
CY2022Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	79162000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78965000	usd
CY2023Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	80002000	usd
CY2022Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	80465000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	80479000	usd
CY2023Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P17Y
CY2022Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P18Y
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P17Y2M12D
CY2023Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.073
CY2022Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.072
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.073
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	5550000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	7495000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	7368000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	7493000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	7637000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	108913000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	144456000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	64454000	usd
CY2023Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	80002000	usd
CY2023Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1700000	usd
CY2023Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78302000	usd
CY2023Q1	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	0	usd
CY2023Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1806000	usd
CY2022Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1739000	usd
CY2023Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	173000	usd
CY2022Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	75000	usd
CY2023Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2022Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	14000	usd
CY2023Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	263000	usd
CY2022Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	100000	usd
CY2023Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	0	usd
CY2023Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2400000	usd
CY2022Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2200000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2300000	usd
CY2023Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	72500000	usd
CY2022Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	332500000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	258200000	usd
CY2023Q1	us-gaap	Other Long Term Debt OtherLongTermDebt	6000000.0	usd
CY2022Q1	us-gaap	Other Long Term Debt OtherLongTermDebt	3500000	usd
CY2022Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	6200000	usd
CY2023Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1545700000	usd
CY2022Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1053200000	usd
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1345900000	usd
CY2023Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	10400000	usd
CY2022Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8200000	usd
CY2022Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	9000000.0	usd
CY2023Q1	nwn	Long Term Debt Current Maturities Gross LongTermDebtCurrentMaturitiesGross	240700000	usd
CY2022Q1	nwn	Long Term Debt Current Maturities Gross LongTermDebtCurrentMaturitiesGross	300000	usd
CY2022Q4	nwn	Long Term Debt Current Maturities Gross LongTermDebtCurrentMaturitiesGross	90700000	usd
CY2023Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1294600000	usd
CY2022Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1044700000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1246200000	usd
CY2023Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1545730000	usd
CY2022Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1053177000	usd
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1345851000	usd
CY2023Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	10428000	usd
CY2022Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8171000	usd
CY2022Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8987000	usd
CY2023Q1	us-gaap	Long Term Debt LongTermDebt	1535302000	usd
CY2022Q1	us-gaap	Long Term Debt LongTermDebt	1045006000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	1336864000	usd
CY2023Q1	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1395321000	usd
CY2022Q1	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1059629000	usd
CY2022Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1148395000	usd
CY2023Q1	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	0	usd
CY2023Q1	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Remainder Of Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear	0	usd
CY2023Q1	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3400000	usd
CY2022Q1	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2900000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	20332000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	15783000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8149000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6513000	usd
CY2023Q1	nwn	Other Tax Expense Benefitdifferencestobeflowedthroughbyregulatorycommissions OtherTaxExpenseBenefitdifferencestobeflowedthroughbyregulatorycommissions	-2909000	usd
CY2022Q1	nwn	Other Tax Expense Benefitdifferencestobeflowedthroughbyregulatorycommissions OtherTaxExpenseBenefitdifferencestobeflowedthroughbyregulatorycommissions	-3173000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-425000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-200000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25147000	usd
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18923000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.260
CY2022Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.252
CY2023Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3155978000	usd
CY2022Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2904756000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3114400000	usd
CY2023Q1	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	47666000	usd
CY2022Q1	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	48486000	usd
CY2022Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	49358000	usd
CY2023Q1	us-gaap	Inventory Gas In Storage Underground Noncurrent InventoryGasInStorageUndergroundNoncurrent	22229000	usd
CY2022Q1	us-gaap	Inventory Gas In Storage Underground Noncurrent InventoryGasInStorageUndergroundNoncurrent	25364000	usd
CY2022Q4	us-gaap	Inventory Gas In Storage Underground Noncurrent InventoryGasInStorageUndergroundNoncurrent	22970000	usd
CY2023Q1	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	23716000	usd
CY2022Q1	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	22416000	usd
CY2022Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	23376000	usd
CY2023Q1	us-gaap	Other Long Term Investments OtherLongTermInvestments	93611000	usd
CY2022Q1	us-gaap	Other Long Term Investments OtherLongTermInvestments	96266000	usd
CY2022Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	95704000	usd
CY2023Q1	nwn	Total Cumulative Gas Reserves Investment TotalCumulativeGasReservesInvestment	188000000	usd
CY2023Q1	nwn	Deferred Taxes Related To Gas Reserves DeferredTaxesRelatedToGasReserves	4400000	usd
CY2022Q1	nwn	Deferred Taxes Related To Gas Reserves DeferredTaxesRelatedToGasReserves	11000000	usd
CY2022Q4	nwn	Deferred Taxes Related To Gas Reserves DeferredTaxesRelatedToGasReserves	5200000	usd
CY2023Q1	us-gaap	Deferred Gas Cost DeferredGasCost	3300000	usd
CY2022Q1	us-gaap	Deferred Gas Cost DeferredGasCost	5200000	usd
CY2022Q4	us-gaap	Deferred Gas Cost DeferredGasCost	3400000	usd
CY2023Q1	nwn	Investments Number Of Rng Development Projects InvestmentsNumberOfRNGDevelopmentProjects	4	numberofprojects
CY2023Q1	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	105700000	usd
CY2023Q1	us-gaap	Goodwill Goodwill	149800000	usd
CY2022Q1	us-gaap	Goodwill Goodwill	70600000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	149300000	usd
CY2023Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023Q1	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	89110000	usd
CY2022Q1	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	86830000	usd
CY2023Q1	us-gaap	Derivative Gain On Derivative DerivativeGainOnDerivative	172400000	usd
CY2022Q1	us-gaap	Derivative Gain On Derivative DerivativeGainOnDerivative	36000000	usd
CY2023Q1	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	2400000	usd
CY2023Q1	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-49900000	usd
CY2022Q1	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	86900000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	149700000	usd
CY2023Q1	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	282000	usd
CY2023Q1	us-gaap	Derivative Instruments Gain Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsGainReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	0	usd
CY2023Q1	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	25187000	usd
CY2022Q1	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	22286000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	28902000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	89905000	usd
CY2022Q4	nwn	Remediation Nonrecovery Percentage RemediationNonrecoveryPercentage	0.033
CY2023Q1	nwn	Remediation Nonrecovery Percentage RemediationNonrecoveryPercentage	0.033
CY2022Q1	nwn	Remediation Nonrecovery Percentage RemediationNonrecoveryPercentage	0.033
CY2023Q1	nwn	Annual Tariff Rider Collection AnnualTariffRiderCollection	5000000	usd
CY2023Q1	nwn	Annual Tariff Rider Collection AnnualTariffRiderCollection	5000000	usd
CY2023Q1	nwn	Annual Insurance Proceedsto Apply Against Remediation Costs AnnualInsuranceProceedstoApplyAgainstRemediationCosts	5000000	usd
CY2023Q1	nwn	Total Annual Remediation Expenseand Interest TotalAnnualRemediationExpenseandInterest	10000000	usd

Files In Submission

Name	View Source	Status
0001733998-23-000016-index-headers.html	Edgar Link	pending
0001733998-23-000016-index.html	Edgar Link	pending
0001733998-23-000016.txt	Edgar Link	pending
0001733998-23-000016-xbrl.zip	Edgar Link	pending
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Financial_Report.xlsx	Edgar Link	pending
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nwn-20230331.xsd	Edgar Link	pending
nwn-20230331_g1.jpg	Edgar Link	pending
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nwn-20230331_cal.xml	Edgar Link	unprocessable
nwn-20230331_lab.xml	Edgar Link	unprocessable

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$NWN
Northwest Natural Holding Co Stock $nwn

2023 Q2 Form 10-Q Financial Statement

#000173399823000016 Filed on May 04, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWN Northwest Natural Holding Co Stock $nwn

2023 Q2 Form 10-Q Financial Statement

#000173399823000016 Filed on May 04, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWN
Northwest Natural Holding Co Stock $nwn