$NWN
Northwest Natural Holding Co Stock $nwn

$nwn Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000173399823000009 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$462.4M	$375.3M	$1.037B
YoY Change	32.01%	27.6%	20.57%
Cost Of Revenue	$224.8M	$184.0M	$471.5M
YoY Change	41.42%	45.86%	44.15%
Gross Profit	$237.6M	$191.2M	$565.9M
YoY Change	24.19%	13.88%	6.1%
Gross Profit Margin	51.39%	50.96%	54.55%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$31.47M	$31.14M	$116.7M
YoY Change	10.68%	7.93%	2.79%
% of Gross Profit	13.24%	16.28%	20.62%
Operating Expenses	$348.9M	$110.0M	$869.9M
YoY Change	32.84%	12.54%	24.75%
Operating Profit	$113.5M	$81.23M	$167.5M
YoY Change	29.52%	15.74%	2.67%
Interest Expense	-$18.30M	-$17.09M	-$53.25M
YoY Change	58.79%	53.19%	19.69%
% of Operating Profit	-16.12%	-21.04%	-31.79%
Other Income/Expense, Net	$1.606M	$295.0K	$1.203M
YoY Change	-268.34%	-107.02%	-109.58%
Pretax Income	$96.82M	$64.43M	$115.4M
YoY Change	28.81%	17.54%	8.83%
Income Tax	$25.15M	$16.50M	$29.13M
% Of Pretax Income	25.97%	25.6%	25.24%
Net Earnings	$71.67M	$47.94M	$86.30M
YoY Change	27.44%	18.28%	9.71%
Net Earnings / Revenue	15.5%	12.77%	8.32%
Basic Earnings Per Share	$2.01		$2.54
Diluted Earnings Per Share	$2.01	$1.36	$2.54
COMMON SHARES
Basic Shares Outstanding	35.54M shares	35.10M shares	33.93M shares
Diluted Shares Outstanding	35.71M shares		33.98M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$140.8M	$29.27M	$29.27M
YoY Change	478.91%	57.71%	57.71%
Cash & Equivalents	$140.8M	$29.27M	$29.27M
Short-Term Investments
Other Short-Term Assets	$41.97M	$61.29M	$462.2M
YoY Change	-0.85%	3.37%	76.44%
Inventory	$41.39M	$87.10M	$87.10M
Prepaid Expenses
Receivables	$157.4M	$165.6M	$165.6M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$576.2M	$744.2M	$744.2M
YoY Change	47.22%	70.19%	70.19%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.156B	$3.114B	$3.322B
YoY Change	8.65%	8.46%	7.67%
Goodwill	$149.8M	$149.3M
YoY Change	112.18%	111.47%
Intangibles
YoY Change
Long-Term Investments	$93.61M	$22.97M	$95.70M
YoY Change	-2.76%	-13.67%	7.2%
Other Assets	$97.79M	$91.52M	$437.0M
YoY Change	30.52%	61.25%	14.38%
Total Long-Term Assets	$4.016B	$4.004B	$4.004B
YoY Change	9.63%	10.39%	10.39%
TOTAL ASSETS
Total Short-Term Assets	$576.2M	$744.2M	$744.2M
Total Long-Term Assets	$4.016B	$4.004B	$4.004B
Total Assets	$4.592B	$4.748B	$4.748B
YoY Change	13.26%	16.82%	16.82%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$111.2M	$180.7M	$180.7M
YoY Change	-14.86%	35.35%	35.35%
Accrued Expenses	$14.79M	$11.68M	$11.68M
YoY Change	21.33%	32.78%	32.78%
Deferred Revenue
YoY Change
Short-Term Debt	$72.50M	$258.2M	$258.2M
YoY Change	-78.2%	-33.71%	-33.71%
Long-Term Debt Due	$240.7M	$90.70M	$90.70M
YoY Change	70906.49%	26188.99%	26188.99%
Total Short-Term Liabilities	$644.1M	$898.7M	$898.7M
YoY Change	-2.16%	24.0%	24.0%
LONG-TERM LIABILITIES
Long-Term Debt	$1.295B	$1.246B	$1.246B
YoY Change	23.92%	19.3%	19.3%
Other Long-Term Liabilities	$118.0M	$123.4M	$1.062B
YoY Change	4.64%	7.36%	4.13%
Total Long-Term Liabilities	$1.413B	$1.370B	$2.308B
YoY Change	22.05%	18.12%	11.8%
TOTAL LIABILITIES
Total Short-Term Liabilities	$644.1M	$898.7M	$898.7M
Total Long-Term Liabilities	$1.413B	$1.370B	$2.308B
Total Liabilities	$2.057B	$2.268B	$3.573B
YoY Change	13.27%	20.38%	14.17%
SHAREHOLDERS EQUITY
Retained Earnings	$430.6M	$376.5M
YoY Change	8.53%	5.82%
Common Stock	$824.3M	$805.3M
YoY Change	36.84%	36.31%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.248B	$1.175B	$1.175B
YoY Change
Total Liabilities & Shareholders Equity	$4.592B	$4.748B	$4.748B
YoY Change	13.26%	16.82%	16.82%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$71.67M	$47.94M	$86.30M
YoY Change	27.44%	18.28%	9.71%
Depreciation, Depletion And Amortization	$31.47M	$31.14M	$116.7M
YoY Change	10.68%	7.93%	2.79%
Cash From Operating Activities	$176.9M	-$18.29M	$147.7M
YoY Change	25.4%	-14.42%	-7.91%
INVESTING ACTIVITIES
Capital Expenditures	$71.27M	$86.76M	$338.6M
YoY Change	-204.02%	-206.43%	15.21%
Acquisitions	$468.0K		$94.28M
YoY Change			7214.12%
Other Investing Activities	$1.285M	-$91.70M	$1.688M
YoY Change	-10.2%	507.82%	3025.93%
Cash From Investing Activities	-$73.02M	-$178.5M	-$435.5M
YoY Change	4.69%	84.73%	45.09%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$208.6M
YoY Change			1091.71%
Debt Paid & Issued, Net	$0.00		$0.00
YoY Change			-100.0%
Cash From Financing Activities	$11.19M	117.4M	$301.6M
YoY Change	-117.82%	0.02%	129.49%
NET CHANGE
Cash From Operating Activities	$176.9M	-18.29M	$147.7M
Cash From Investing Activities	-$73.02M	-178.5M	-$435.5M
Cash From Financing Activities	$11.19M	117.4M	$301.6M
Net Change In Cash	$115.0M	-79.31M	$13.84M
YoY Change	1249.64%	14267.03%	-266.11%
FREE CASH FLOW
Cash From Operating Activities	$176.9M	-$18.29M	$147.7M
Capital Expenditures	$71.27M	$86.76M	$338.6M
Free Cash Flow	$105.6M	-$105.0M	-$190.9M
YoY Change	-49.61%	-274.66%	42.98%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001733998
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CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P0Y
CY2022	us-gaap	Operating Lease Income Comprehensive Income Extensible List OperatingLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2022#Revenues
CY2021	us-gaap	Operating Lease Income Comprehensive Income Extensible List OperatingLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2022#Revenues
CY2020	us-gaap	Operating Lease Income Comprehensive Income Extensible List OperatingLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2022#Revenues
CY2022	us-gaap	Sales Type Lease Income Comprehensive Income Extensible List SalesTypeLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2022#Revenues
CY2021	us-gaap	Sales Type Lease Income Comprehensive Income Extensible List SalesTypeLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2022#Revenues
CY2020	us-gaap	Sales Type Lease Income Comprehensive Income Extensible List SalesTypeLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2022#Revenues
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CY2022Q4	nwn	Return On Invested Capital Threshold Performance Shares ReturnOnInvestedCapitalThresholdPerformanceShares	P3Y
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CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	1-38681
CY2022	dei	Entity Registrant Name EntityRegistrantName	NORTHWEST NATURAL HOLDING COMPANY
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	OR
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	82-4710680
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	250 S.W. Taylor Street
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Portland
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	OR
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	97204
CY2022	dei	City Area Code CityAreaCode	(503)
CY2022	dei	Local Phone Number LocalPhoneNumber	226-4211
CY2022	dei	Security12b Title Security12bTitle	Common Stock
CY2022	dei	Trading Symbol TradingSymbol	NWN
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	1825498356	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	35539262	shares
CY2022	dei	Auditor Firm AuditorFirmId	238
CY2022	dei	Auditor Name AuditorName	PricewaterhouseCoopers LLP
CY2022	dei	Auditor Location AuditorLocation	Portland, Oregon
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CY2022	us-gaap	Utilities Operating Expense Gas And Petroleum Purchased UtilitiesOperatingExpenseGasAndPetroleumPurchased	429635000	usd
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CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	12389000	usd
CY2021	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	9938000	usd
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CY2022	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	41031000	usd
CY2021	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	38633000	usd
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	35078000	usd
CY2022	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	41826000	usd
CY2021	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	34740000	usd
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CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	103683000	usd
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3621000	usd
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3897000	usd
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CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	167477000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	163117000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	148351000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1203000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-12559000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-13944000	usd
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-53247000	usd
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-44486000	usd
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-43052000	usd
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CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	78666000	usd
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	70273000	usd
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CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.56
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CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
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CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.54
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.56
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.51
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.54
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.56
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.51
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29270000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	18559000	usd
CY2022Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	168906000	usd
CY2021Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	101495000	usd
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	89048000	usd
CY2021Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	82169000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3296000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2018000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	117491000	usd
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	72391000	usd
CY2022Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	194412000	usd
CY2021Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	48130000	usd
CY2022Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	87096000	usd
CY2021Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	57262000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	61286000	usd
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	59288000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	744213000	usd
CY2021Q4	us-gaap	Assets Current AssetsCurrent	437276000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4261566000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3997243000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1147166000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1125873000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3114400000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2871370000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	340432000	usd
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	314579000	usd
CY2022Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	5045000	usd
CY2021Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	10730000	usd
CY2022Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	95704000	usd
CY2021Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	89278000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	73429000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	75049000	usd
CY2022Q4	us-gaap	Net Investment In Lease Noncurrent NetInvestmentInLeaseNoncurrent	134302000	usd
CY2021Q4	us-gaap	Net Investment In Lease Noncurrent NetInvestmentInLeaseNoncurrent	138995000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	149283000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	70570000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	91518000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	56757000	usd
CY2022Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	4004113000	usd
CY2021Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	3627328000	usd
CY2022Q4	us-gaap	Assets Assets	4748326000	usd
CY2021Q4	us-gaap	Assets Assets	4064604000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	258200000	usd
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	389500000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	90697000	usd
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	345000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	180667000	usd
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	133486000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	15625000	usd
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	15520000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	10169000	usd
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	7503000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	248582000	usd
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	112281000	usd
CY2022Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	28728000	usd
CY2021Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	10402000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1514000	usd
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1296000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	64552000	usd
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	54432000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	898734000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	724765000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1246167000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1044587000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	366022000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	340231000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	689578000	usd
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	658332000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	149143000	usd
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	166684000	usd
CY2022Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	20838000	usd
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	412000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78965000	usd
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	79468000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	123438000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	114979000	usd
CY2022Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	1427984000	usd
CY2021Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	1360106000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2022Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35525000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35525000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	31129000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	31129000	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	805253000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	590771000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	376473000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	355779000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6285000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11404000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1175441000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	935146000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4748326000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4064604000	usd
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	865999000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	74612000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.91
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	58708000	usd
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4361000	usd
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2469000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	888733000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	80164000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.92
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	59410000	usd
CY2021	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	3615000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4543000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	17501000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	935146000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	91422000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.93
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	65609000	usd
CY2022	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	3228000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2978000	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	208276000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1175441000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	86303000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	78666000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	76781000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	116707000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	113534000	usd
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	103683000	usd
CY2022	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	5589000	usd
CY2021	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	13897000	usd
CY2020	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	17779000	usd
CY2022	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	17410000	usd
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	14617000	usd
CY2022	nwn	Asset Optimization Revenue Sharing Bill Credits AssetOptimizationRevenueSharingBillCredits	-41102000	usd
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	18667000	usd
CY2022	us-gaap	Pension Expense PensionExpense	5351000	usd
CY2021	us-gaap	Pension Expense PensionExpense	16556000	usd
CY2020	us-gaap	Pension Expense PensionExpense	18370000	usd
CY2022	us-gaap	Pension Contributions PensionContributions	0	usd
CY2021	us-gaap	Pension Contributions PensionContributions	9590000	usd
CY2020	us-gaap	Pension Contributions PensionContributions	28980000	usd
CY2022	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-18160000	usd
CY2021	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-18187000	usd
CY2020	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-27871000	usd
CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	12389000	usd
CY2021	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	9938000	usd
CY2020	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	9691000	usd
CY2022	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	0	usd
CY2021	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	0	usd
CY2020	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	5902000	usd
CY2021	nwn	Asset Optimization Revenue Sharing Bill Credits AssetOptimizationRevenueSharingBillCredits	-9053000	usd
CY2020	nwn	Asset Optimization Revenue Sharing Bill Credits AssetOptimizationRevenueSharingBillCredits	-16970000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-21558000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-20622000	usd
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-10028000	usd
CY2022	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	76454000	usd
CY2021	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	44128000	usd
CY2020	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	16799000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	29269000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	14571000	usd
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1262000	usd
CY2022	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	6908000	usd
CY2021	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	3292000	usd
CY2020	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-10710000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	24508000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	12118000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-15910000	usd
CY2022	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	-12334000	usd
CY2021	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	40541000	usd
CY2020	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	-17590000	usd
CY2022	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-28937000	usd
CY2021	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-44458000	usd
CY2020	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	7244000	usd
CY2022	nwn	Change In Decoupling Regulatory Deferral ChangeInDecouplingRegulatoryDeferral	-10922000	usd
CY2021	nwn	Change In Decoupling Regulatory Deferral ChangeInDecouplingRegulatoryDeferral	5206000	usd
CY2020	nwn	Change In Decoupling Regulatory Deferral ChangeInDecouplingRegulatoryDeferral	-2884000	usd
CY2022	nwn	Increase Decrease In Cloud Based Software Operating Assets IncreaseDecreaseInCloudBasedSoftwareOperatingAssets	23908000	usd
CY2021	nwn	Increase Decrease In Cloud Based Software Operating Assets IncreaseDecreaseInCloudBasedSoftwareOperatingAssets	7407000	usd
CY2020	nwn	Increase Decrease In Cloud Based Software Operating Assets IncreaseDecreaseInCloudBasedSoftwareOperatingAssets	4265000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	12351000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	18662000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1340000	usd
CY2022	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	usd
CY2021	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	usd
CY2020	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	1894000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	147672000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	160353000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	145318000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	338602000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	293892000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	273016000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	94279000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1289000	usd
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	38263000	usd
CY2022	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	761000	usd
CY2021	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	1364000	usd
CY2020	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	7878000	usd
CY2022	us-gaap	Proceeds From Sale Of Land Held For Use ProceedsFromSaleOfLandHeldForUse	870000	usd
CY2021	us-gaap	Proceeds From Sale Of Land Held For Use ProceedsFromSaleOfLandHeldForUse	3926000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-435460000	usd
CY2020	us-gaap	Proceeds From Sale Of Land Held For Use ProceedsFromSaleOfLandHeldForUse	8149000	usd
CY2022	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1000000	usd
CY2021	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	14450000	usd
CY2020	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	usd
CY2022	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	usd
CY2021	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	7000000	usd
CY2020	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	7000000	usd
CY2022	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	usd
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	usd
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	12500000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1688000	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	54000	usd
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1654000	usd
CY2022	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	usd
CY2021	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	usd
CY2020	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-4423000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-300123000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-294277000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	208561000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17501000	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	290000000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	185000000	usd
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	150000000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	95000000	usd
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	75000000	usd
CY2022	us-gaap	Proceeds From Debt Maturing In More Than Three Months ProceedsFromDebtMaturingInMoreThanThreeMonths	0	usd
CY2021	us-gaap	Proceeds From Debt Maturing In More Than Three Months ProceedsFromDebtMaturingInMoreThanThreeMonths	100000000	usd
CY2020	us-gaap	Proceeds From Debt Maturing In More Than Three Months ProceedsFromDebtMaturingInMoreThanThreeMonths	150000000	usd
CY2022	us-gaap	Repayments Of Debt Maturing In More Than Three Months RepaymentsOfDebtMaturingInMoreThanThreeMonths	0	usd
CY2021	us-gaap	Repayments Of Debt Maturing In More Than Three Months RepaymentsOfDebtMaturingInMoreThanThreeMonths	100000000	usd
CY2020	us-gaap	Repayments Of Debt Maturing In More Than Three Months RepaymentsOfDebtMaturingInMoreThanThreeMonths	150000000	usd
CY2022	nwn	Proceeds From Issuances Of Commercial Paper Maturities Greater Than90 Days ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days	0	usd
CY2021	nwn	Proceeds From Issuances Of Commercial Paper Maturities Greater Than90 Days ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days	0	usd
CY2020	nwn	Proceeds From Issuances Of Commercial Paper Maturities Greater Than90 Days ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days	195025000	usd
CY2022	nwn	Repayments Of Commercial Paper Maturities Greater Than Three Months RepaymentsOfCommercialPaperMaturitiesGreaterThanThreeMonths	0	usd
CY2021	nwn	Repayments Of Commercial Paper Maturities Greater Than Three Months RepaymentsOfCommercialPaperMaturitiesGreaterThanThreeMonths	-195025000	usd
CY2020	nwn	Repayments Of Commercial Paper Maturities Greater Than Three Months RepaymentsOfCommercialPaperMaturitiesGreaterThanThreeMonths	0	usd
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-131300000	usd
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	280000000	usd
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-39600000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	62771000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	55919000	usd
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	55420000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2858000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5121000	usd
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3228000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	301632000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	131436000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	171777000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	13844000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-8334000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	22818000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27120000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35454000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12636000	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
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35454000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	50823000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	43719000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	42651000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2779000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10555000	usd
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13644000	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9.5pt;font-weight:700;line-height:120%;text-decoration:underline">Use of Estimates</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%"> </span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect reported amounts in the consolidated financial statements and accompanying notes. Actual amounts could differ from those estimates, and changes would most likely be reported in future periods. Management believes the estimates and assumptions used are reasonable</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div>
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	340432000	usd
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	314579000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	248582000	usd
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	112281000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	689578000	usd
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	658332000	usd
CY2022	nwn	Weighted Average Depreciation Rates Transmission Distribution WeightedAverageDepreciationRatesTransmissionDistribution	0.025
CY2022	nwn	Weighted Average Depreciation Rates Utility Storage WeightedAverageDepreciationRatesUtilityStorage	0.021
CY2022	nwn	Weighted Average Depreciation Rates General Plant WeightedAverageDepreciationRatesGeneralPlant	0.061
CY2022	nwn	Weighted Average Depreciation Rates Intangible Other WeightedAverageDepreciationRatesIntangibleOther	0.067
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.028
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.007
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.019
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29270000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	18559000	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
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	89000000	usd
CY2021Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	82200000	usd
CY2022	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	41800000	usd
CY2021	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	34700000	usd
CY2020	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	30300000	usd
CY2022Q4	nwn	Inactive Account Period Outstanding Prior To Write Off InactiveAccountPeriodOutstandingPriorToWriteOff	P120D
CY2022Q4	nwn	General Payment Term Of Ngd Receivables GeneralPaymentTermOfNGDReceivables	P15D
CY2022Q4	nwn	Age Of Closed Or Inactive Accounts AgeOfClosedOrInactiveAccounts	P120D
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2018000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	2891000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	1613000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	3296000	usd
CY2022Q4	nwn	Number Of Net Investments In Sales Type Leases NumberOfNetInvestmentsInSalesTypeLeases	2	numberofleases
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	23500000	usd
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	19900000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	149300000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	70600000	usd
CY2022Q4	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2022Q4	us-gaap	Equity Method Investment Underlying Equity In Net Assets EquityMethodInvestmentUnderlyingEquityInNetAssets	23400000	usd
CY2021Q4	us-gaap	Equity Method Investment Underlying Equity In Net Assets EquityMethodInvestmentUnderlyingEquityInNetAssets	14500000	usd
CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	86303000	usd
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	78666000	usd
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	70273000	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	6508000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	86303000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	78666000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	76781000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33934000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30702000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30541000	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	50000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	50000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	58000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33984000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30752000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30599000	shares
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.54
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.56
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.30
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.54
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.56
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.30
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.54
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.56
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.51
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.54
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.56
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.51
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
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
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1039765000	usd
CY2022	us-gaap	Revenues Revenues	1037353000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	828155000	usd
CY2021	us-gaap	Revenues Revenues	860400000	usd
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	744366000	usd
CY2020	us-gaap	Revenues Revenues	773679000	usd
CY2022Q4	nwn	Revenue Over Time Performance Obligation Number RevenueOverTimePerformanceObligationNumber	1	performanceobligations
CY2022Q4	us-gaap	Lessor Sales Type Lease Term Of Contract1 LessorSalesTypeLeaseTermOfContract1	P30Y
CY2022Q4	us-gaap	Lessor Sales Type Lease Renewal Term1 LessorSalesTypeLeaseRenewalTerm1	P50Y
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	81400000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	20300000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	16200000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	13500000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	9400000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	22000000	usd
CY2022Q4	us-gaap	Lessor Sales Type Lease Term Of Contract1 LessorSalesTypeLeaseTermOfContract1	P30Y
CY2022Q4	us-gaap	Lessor Sales Type Lease Renewal Term1 LessorSalesTypeLeaseRenewalTerm1	P50Y
CY2022	us-gaap	Lease Income LeaseIncome	17193000	usd
CY2021	us-gaap	Lease Income LeaseIncome	17551000	usd
CY2020	us-gaap	Lease Income LeaseIncome	18443000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	672000	usd
CY2022Q4	nwn	Lease Paymentstobe Received Nexttwelvemonths LeasePaymentstobeReceivedNexttwelvemonths	17229000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	664000	usd
CY2022Q4	nwn	Lease Paymentstobe Received Two Years LeasePaymentstobeReceivedTwoYears	16531000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	656000	usd
CY2022Q4	nwn	Lease Paymentstobe Received Three Years LeasePaymentstobeReceivedThreeYears	15962000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	92000	usd
CY2022Q4	nwn	Lease Paymentstobe Received Four Years LeasePaymentstobeReceivedFourYears	14993000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	79000	usd
CY2022Q4	nwn	Lease Paymentstobe Received Five Years LeasePaymentstobeReceivedFiveYears	14600000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	857000	usd
CY2022Q4	nwn	Lease Paymentstobe Received Thereafter LeasePaymentstobeReceivedThereafter	223156000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	3020000	usd
CY2022Q4	nwn	Lease Paymentstobe Received LeasePaymentstobeReceived	302471000	usd
CY2022Q4	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	5100000	usd
CY2021Q4	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	4700000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	7034000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	880000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	6917000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1220000	usd
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	4506000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1010000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	73429000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1514000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78965000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	80479000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	75049000	usd
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1296000	usd
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	79468000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	80764000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P17Y2M12D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P18Y2M12D
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	7364000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	7495000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	7369000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	7493000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7637000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	108913000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	146271000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	65792000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	80479000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1514000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78965000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	0	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	7057000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	524000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	977000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	270000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	6898000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	801000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	223000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	314000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	4597000	usd
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	835000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	78590000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1386000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	0	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	762000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	866000	usd
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	933000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	2115000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	2406000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	2592000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	351000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	344000	usd
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	841000	usd
CY2022Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.053
CY2021Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.011
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	258200000	usd
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	389500000	usd
CY2022	nwn	Commercial Paper Maximum Maturity CommercialPaperMaximumMaturity	P6D
CY2022	nwn	Commercial Paper Average Maturity CommercialPaperAverageMaturity	P5D
CY2022Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	6200000	usd
CY2021Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	3500000	usd
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CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1053200000	usd
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CY2021Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8300000	usd
CY2022Q4	nwn	Long Term Debt Current Maturities Gross LongTermDebtCurrentMaturitiesGross	90700000	usd
CY2021Q4	nwn	Long Term Debt Current Maturities Gross LongTermDebtCurrentMaturitiesGross	300000	usd
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CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1044600000	usd
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CY2021Q4	us-gaap	Ratio Of Indebtedness To Net Capital1 RatioOfIndebtednessToNetCapital1	0.605
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CY2021Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8309000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	1336864000	usd
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	1044932000	usd
CY2022Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1148395000	usd
CY2021Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1174500000	usd
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CY2022	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2029
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CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	24241000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22275000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	19185000	usd
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CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	9962000	usd
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6389000	usd
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CY2021	nwn	Differences Regulatory Commission DifferencesRegulatoryCommission	-4655000	usd
CY2020	nwn	Differences Regulatory Commission DifferencesRegulatoryCommission	-3960000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-502000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-176000	usd
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-532000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	29130000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27406000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21082000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.252
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.258
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.231
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5172000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6508000	usd
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CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12789000	usd
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CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	11124000	usd
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CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Other DeferredTaxAssetsTaxCreditCarryforwardsOther	101000	usd
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CY2021Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	89278000	usd
CY2022Q4	nwn	Total Cumulative Gas Reserves Investment TotalCumulativeGasReservesInvestment	188000000	usd
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CY2021	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	724000	usd
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CY2021	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1706000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2018000	usd
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	673000	usd
CY2020	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	890000	usd
CY2020	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	2333000	usd
CY2020	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	677000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3219000	usd

Files In Submission

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$NWN
Northwest Natural Holding Co Stock $nwn

2023 Q1 Form 10-K Financial Statement

#000173399823000009 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWN Northwest Natural Holding Co Stock $nwn

2023 Q1 Form 10-K Financial Statement

#000173399823000009 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWN
Northwest Natural Holding Co Stock $nwn