$NWN
Northwest Natural Holding Co

2021 Q4 Form 10-K Financial Statement

#000173399822000005 Filed on February 25, 2022

View on sec.gov

Income Statement

Concept 2021 Q4 2021 2020 Q4
Revenue $294.1M $860.4M $260.3M
YoY Change 12.98% 11.21% 5.27%
Cost Of Revenue $126.2M $327.1M $99.80M
YoY Change 26.41% 11.62% -9.93%
Gross Profit $167.9M $533.3M $160.5M
YoY Change 4.63% 10.95% 17.58%
Gross Profit Margin 57.1% 61.99% 61.66%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization $28.86M $113.5M $27.30M
YoY Change 5.7% 9.48% 12.81%
% of Gross Profit 17.18% 21.29% 17.01%
Operating Expenses $97.75M $697.3M $85.90M
YoY Change 13.8% 11.51% 2.02%
Operating Profit $70.18M $163.1M $74.60M
YoY Change -5.93% 9.95% 42.64%
Interest Expense -$11.16M -$44.49M -$10.70M
YoY Change 4.27% 3.33% 386.36%
% of Operating Profit -15.9% -27.27% -14.34%
Other Income/Expense, Net -$4.204M -$12.56M -$4.000M
YoY Change 5.1% -9.93% -2.44%
Pretax Income $54.82M $106.1M $59.80M
YoY Change -8.33% 16.11% 30.0%
Income Tax $14.29M $27.41M $14.00M
% Of Pretax Income 26.07% 25.84% 23.41%
Net Earnings $40.53M $78.67M $52.00M
YoY Change -22.06% 2.46% 41.54%
Net Earnings / Revenue 13.78% 9.14% 19.98%
Basic Earnings Per Share $2.56
Diluted Earnings Per Share $1.312M $2.56 $1.694M
COMMON SHARES
Basic Shares Outstanding 30.73M shares 30.70M shares 30.57M shares
Diluted Shares Outstanding 30.75M shares

Balance Sheet

Concept 2021 Q4 2021 2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments $18.56M $18.56M $30.20M
YoY Change -38.55% -38.55% 214.58%
Cash & Equivalents $18.56M $18.56M $30.17M
Short-Term Investments
Other Short-Term Assets $59.29M $262.0M $56.15M
YoY Change 5.59% 76.89% 47.75%
Inventory $57.26M $57.26M $54.10M
Prepaid Expenses
Receivables $99.48M $99.48M $84.90M
Other Receivables $0.00 $0.00 $6.000M
Total Short-Term Assets $437.3M $437.3M $323.2M
YoY Change 35.28% 35.3% 10.06%
LONG-TERM ASSETS
Property, Plant & Equipment $2.871B $3.085B $2.655B
YoY Change 8.16% 7.29% 8.85%
Goodwill $70.60M $69.20M
YoY Change 2.02% 38.68%
Intangibles
YoY Change
Long-Term Investments $26.61M $89.28M $34.48M
YoY Change -22.84% 81.09% 155.97%
Other Assets $56.76M $382.1M $49.13M
YoY Change 15.53% -12.91% 27.73%
Total Long-Term Assets $3.627B $3.627B $3.433B
YoY Change 5.66% 5.65% 9.52%
TOTAL ASSETS
Total Short-Term Assets $437.3M $437.3M $323.2M
Total Long-Term Assets $3.627B $3.627B $3.433B
Total Assets $4.065B $4.065B $3.756B
YoY Change 8.21% 8.2% 9.56%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $133.5M $133.5M $97.97M
YoY Change 36.26% 36.21% -13.59%
Accrued Expenses $8.799M $8.799M $8.500M
YoY Change 3.52% 3.52% -11.46%
Deferred Revenue
YoY Change
Short-Term Debt $389.5M $389.5M $304.5M
YoY Change 27.91% 27.91% 104.23%
Long-Term Debt Due $345.0K $345.0K $95.34M
YoY Change -99.64% -99.64% 26.94%
Total Short-Term Liabilities $724.8M $724.8M $627.1M
YoY Change 15.58% 15.57% 30.05%
LONG-TERM LIABILITIES
Long-Term Debt $1.045B $1.045B $860.1M
YoY Change 21.45% 21.45% 6.72%
Other Long-Term Liabilities $115.0M $1.020B $120.8M
YoY Change -4.79% -3.89% -2.12%
Total Long-Term Liabilities $1.160B $2.064B $980.8M
YoY Change 18.22% 7.45% 5.54%
TOTAL LIABILITIES
Total Short-Term Liabilities $724.8M $724.8M $627.1M
Total Long-Term Liabilities $1.160B $2.064B $980.8M
Total Liabilities $1.884B $3.129B $1.608B
YoY Change 17.19% 9.13% 13.92%
SHAREHOLDERS EQUITY
Retained Earnings $355.8M $336.5M
YoY Change 5.72% 5.68%
Common Stock $590.8M $565.1M
YoY Change 4.54% 1.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity $935.1M $935.1M $888.7M
YoY Change
Total Liabilities & Shareholders Equity $4.065B $4.065B $3.756B
YoY Change 8.21% 8.2% 9.56%

Cashflow Statement

Concept 2021 Q4 2021 2020 Q4
OPERATING ACTIVITIES
Net Income $40.53M $78.67M $52.00M
YoY Change -22.06% 2.46% 41.54%
Depreciation, Depletion And Amortization $28.86M $113.5M $27.30M
YoY Change 5.7% 9.48% 12.81%
Cash From Operating Activities -$21.37M $160.4M -$5.500M
YoY Change 288.56% 10.35% -118.33%
INVESTING ACTIVITIES
Capital Expenditures -$81.52M $293.9M -$79.70M
YoY Change 2.28% 7.65% 13.05%
Acquisitions $1.289M
YoY Change -96.63%
Other Investing Activities -$15.09M $54.00K $12.10M
YoY Change -224.68% -103.26% -251.25%
Cash From Investing Activities -$96.60M -$300.1M -$67.50M
YoY Change 43.11% 1.99% -14.01%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net $17.50M
YoY Change
Debt Paid & Issued, Net $95.00M
YoY Change 26.67%
Cash From Financing Activities 117.4M $131.4M 67.30M
YoY Change 74.47% -23.48% 41.39%
NET CHANGE
Cash From Operating Activities -21.37M $160.4M -5.500M
Cash From Investing Activities -96.60M -$300.1M -67.50M
Cash From Financing Activities 117.4M $131.4M 67.30M
Net Change In Cash -552.0K -$8.334M -5.700M
YoY Change -90.32% -136.52% 533.33%
FREE CASH FLOW
Cash From Operating Activities -$21.37M $160.4M -$5.500M
Capital Expenditures -$81.52M $293.9M -$79.70M
Free Cash Flow $60.15M -$133.5M $74.20M
YoY Change -18.94% 4.57% -26.17%

Facts In Submission

Frame Concept Type Concept / XBRL Key Value Unit
CY2021 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2021
CY2021 dei Document Fiscal Period Focus
DocumentFiscalPeriodFocus
FY
CY2021 dei Amendment Flag
AmendmentFlag
false
CY2021 dei Entity Central Index Key
EntityCentralIndexKey
0001733998
CY2021Q4 us-gaap Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
P1Y
CY2021Q4 us-gaap Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
P1Y
CY2021Q4 us-gaap Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
P1Y
CY2021Q4 us-gaap Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
P1Y
CY2021Q4 us-gaap Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
P0Y
CY2021 dei Document Type
DocumentType
10-K
CY2021 dei Document Annual Report
DocumentAnnualReport
true
CY2021 dei Document Period End Date
DocumentPeriodEndDate
2021-12-31
CY2021 dei Current Fiscal Year End Date
CurrentFiscalYearEndDate
--12-31
CY2021 dei Document Transition Report
DocumentTransitionReport
false
CY2021 dei Entity File Number
EntityFileNumber
1-38681
CY2021 dei Entity Registrant Name
EntityRegistrantName
NORTHWEST NATURAL HOLDING COMPANY
CY2021 dei Entity Incorporation State Country Code
EntityIncorporationStateCountryCode
OR
CY2021 dei Entity Tax Identification Number
EntityTaxIdentificationNumber
82-4710680
CY2021 dei Entity Address Address Line1
EntityAddressAddressLine1
250 S.W. Taylor Street
CY2021 dei Entity Address City Or Town
EntityAddressCityOrTown
Portland
CY2021 dei Entity Address State Or Province
EntityAddressStateOrProvince
OR
CY2021 dei Entity Address Postal Zip Code
EntityAddressPostalZipCode
97204
CY2021 dei City Area Code
CityAreaCode
(503)
CY2021 dei Local Phone Number
LocalPhoneNumber
226-4211
CY2021 dei Security12b Title
Security12bTitle
Common Stock
CY2021 dei Trading Symbol
TradingSymbol
NWN
CY2021 dei Security Exchange Name
SecurityExchangeName
NYSE
CY2021 dei Entity Well Known Seasoned Issuer
EntityWellKnownSeasonedIssuer
Yes
CY2021 dei Entity Voluntary Filers
EntityVoluntaryFilers
No
CY2021 dei Entity Current Reporting Status
EntityCurrentReportingStatus
Yes
CY2021 dei Entity Interactive Data Current
EntityInteractiveDataCurrent
Yes
CY2021 dei Entity Filer Category
EntityFilerCategory
Large Accelerated Filer
CY2021 dei Entity Small Business
EntitySmallBusiness
false
CY2021 dei Entity Emerging Growth Company
EntityEmergingGrowthCompany
false
CY2021 dei Icfr Auditor Attestation Flag
IcfrAuditorAttestationFlag
true
CY2021 dei Entity Shell Company
EntityShellCompany
false
CY2021Q2 dei Entity Public Float
EntityPublicFloat
1593506169 USD
CY2022Q1 dei Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
31155771 shares
CY2021 dei Auditor Firm
AuditorFirmId
238
CY2021 dei Auditor Name
AuditorName
PricewaterhouseCoopers LLP
CY2021 dei Auditor Location
AuditorLocation
Portland, Oregon
CY2021 us-gaap Revenues
Revenues
860400000 USD
CY2020 us-gaap Revenues
Revenues
773679000 USD
CY2019 us-gaap Revenues
Revenues
746372000 USD
CY2021 us-gaap Utilities Operating Expense Gas And Petroleum Purchased
UtilitiesOperatingExpenseGasAndPetroleumPurchased
292314000 USD
CY2020 us-gaap Utilities Operating Expense Gas And Petroleum Purchased
UtilitiesOperatingExpenseGasAndPetroleumPurchased
262755000 USD
CY2019 us-gaap Utilities Operating Expense Gas And Petroleum Purchased
UtilitiesOperatingExpenseGasAndPetroleumPurchased
254911000 USD
CY2021 us-gaap Operating Costs And Expenses
OperatingCostsAndExpenses
204227000 USD
CY2020 us-gaap Operating Costs And Expenses
OperatingCostsAndExpenses
180129000 USD
CY2019 us-gaap Operating Costs And Expenses
OperatingCostsAndExpenses
178191000 USD
CY2021 us-gaap Environmental Remediation Expense
EnvironmentalRemediationExpense
9938000 USD
CY2020 us-gaap Environmental Remediation Expense
EnvironmentalRemediationExpense
9691000 USD
CY2019 us-gaap Environmental Remediation Expense
EnvironmentalRemediationExpense
12337000 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
CY2019 us-gaap Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
32388000 USD
CY2021 us-gaap Utilities Operating Expense Taxes
UtilitiesOperatingExpenseTaxes
34740000 USD
CY2020 us-gaap Utilities Operating Expense Taxes
UtilitiesOperatingExpenseTaxes
30291000 USD
CY2019 us-gaap Utilities Operating Expense Taxes
UtilitiesOperatingExpenseTaxes
30325000 USD
CY2021 us-gaap Depreciation And Amortization
DepreciationAndAmortization
113534000 USD
CY2020 us-gaap Depreciation And Amortization
DepreciationAndAmortization
103683000 USD
CY2019 us-gaap Depreciation And Amortization
DepreciationAndAmortization
91496000 USD
CY2021 us-gaap Other Cost And Expense Operating
OtherCostAndExpenseOperating
3897000 USD
CY2020 us-gaap Other Cost And Expense Operating
OtherCostAndExpenseOperating
3701000 USD
CY2019 us-gaap Other Cost And Expense Operating
OtherCostAndExpenseOperating
3250000 USD
CY2021 us-gaap Operating Expenses
OperatingExpenses
697283000 USD
CY2020 us-gaap Operating Expenses
OperatingExpenses
625328000 USD
CY2019 us-gaap Operating Expenses
OperatingExpenses
602898000 USD
CY2021 us-gaap Operating Income Loss
OperatingIncomeLoss
163117000 USD
CY2020 us-gaap Operating Income Loss
OperatingIncomeLoss
148351000 USD
CY2019 us-gaap Operating Income Loss
OperatingIncomeLoss
143474000 USD
CY2021 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-12559000 USD
CY2020 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-13944000 USD
CY2019 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-22836000 USD
CY2021 us-gaap Interest Income Expense Nonoperating Net
InterestIncomeExpenseNonoperatingNet
-44486000 USD
CY2020 us-gaap Interest Income Expense Nonoperating Net
InterestIncomeExpenseNonoperatingNet
-43052000 USD
CY2019 us-gaap Interest Income Expense Nonoperating Net
InterestIncomeExpenseNonoperatingNet
-42685000 USD
CY2021 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
106072000 USD
CY2020 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
91355000 USD
CY2019 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
77953000 USD
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
27406000 USD
CY2020 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
21082000 USD
CY2019 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
12642000 USD
CY2021 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
78666000 USD
CY2020 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
70273000 USD
CY2019 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
65311000 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
CY2019 us-gaap Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
-3576000 USD
CY2021 us-gaap Net Income Loss
NetIncomeLoss
78666000 USD
CY2020 us-gaap Net Income Loss
NetIncomeLoss
76781000 USD
CY2019 us-gaap Net Income Loss
NetIncomeLoss
61735000 USD
CY2021 us-gaap Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
-219 USD
CY2020 us-gaap Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
1025 USD
CY2019 us-gaap Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
956 USD
CY2021 us-gaap Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
593000 USD
CY2020 us-gaap Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
-2848000 USD
CY2019 us-gaap Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
-2655000 USD
CY2021 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
-320 USD
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
-244 USD
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
-172 USD
CY2021 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
905000 USD
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
679000 USD
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
476000 USD
CY2021 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
80164000 USD
CY2020 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
74612000 USD
CY2019 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
59556000 USD
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
CY2019 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
29786000 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
CY2019 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
29859000 shares
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
CY2019 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
2.19
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
CY2019 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
2.19
CY2021 us-gaap Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share
DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare
0
CY2020 us-gaap Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share
DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare
0.21
CY2019 us-gaap Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share
DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare
-0.12
CY2021 us-gaap Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share
DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
0
CY2020 us-gaap Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share
DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
0.21
CY2019 us-gaap Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share
DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
-0.12
CY2021 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.56
CY2020 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.51
CY2019 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.07
CY2021 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.56
CY2020 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.51
CY2019 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.07
CY2021Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
18559000 USD
CY2020Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
30168000 USD
CY2021Q4 us-gaap Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
101495000 USD
CY2020Q4 us-gaap Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
88083000 USD
CY2021Q4 us-gaap Unbilled Receivables Current
UnbilledReceivablesCurrent
82169000 USD
CY2020Q4 us-gaap Unbilled Receivables Current
UnbilledReceivablesCurrent
57949000 USD
CY2021Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
2018000 USD
CY2020Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
3219000 USD
CY2021Q4 us-gaap Regulatory Assets Current
RegulatoryAssetsCurrent
72391000 USD
CY2020Q4 us-gaap Regulatory Assets Current
RegulatoryAssetsCurrent
31745000 USD
CY2021Q4 us-gaap Derivative Assets Current
DerivativeAssetsCurrent
48130000 USD
CY2020Q4 us-gaap Derivative Assets Current
DerivativeAssetsCurrent
13678000 USD
CY2021Q4 us-gaap Public Utilities Inventory
PublicUtilitiesInventory
57262000 USD
CY2020Q4 us-gaap Public Utilities Inventory
PublicUtilitiesInventory
42691000 USD
CY2021Q4 us-gaap Income Taxes Receivable
IncomeTaxesReceivable
0 USD
CY2020Q4 us-gaap Income Taxes Receivable
IncomeTaxesReceivable
6000000 USD
CY2021Q4 us-gaap Other Assets Current
OtherAssetsCurrent
59288000 USD
CY2020Q4 us-gaap Other Assets Current
OtherAssetsCurrent
56150000 USD
CY2021Q4 us-gaap Assets Current
AssetsCurrent
437276000 USD
CY2020Q4 us-gaap Assets Current
AssetsCurrent
323245000 USD
CY2021Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
3997243000 USD
CY2020Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
3734039000 USD
CY2021Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
1125873000 USD
CY2020Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
1079269000 USD
CY2021Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
2871370000 USD
CY2020Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
2654770000 USD
CY2021Q4 us-gaap Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
314579000 USD
CY2020Q4 us-gaap Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
348927000 USD
CY2021Q4 us-gaap Derivative Assets Noncurrent
DerivativeAssetsNoncurrent
10730000 USD
CY2020Q4 us-gaap Derivative Assets Noncurrent
DerivativeAssetsNoncurrent
6135000 USD
CY2021Q4 us-gaap Other Long Term Investments
OtherLongTermInvestments
89278000 USD
CY2020Q4 us-gaap Other Long Term Investments
OtherLongTermInvestments
83743000 USD
CY2021Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
75049000 USD
CY2020Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
77446000 USD
CY2021Q4 us-gaap Net Investment In Lease Noncurrent
NetInvestmentInLeaseNoncurrent
138995000 USD
CY2020Q4 us-gaap Net Investment In Lease Noncurrent
NetInvestmentInLeaseNoncurrent
143759000 USD
CY2021Q4 us-gaap Goodwill
Goodwill
70570000 USD
CY2020Q4 us-gaap Goodwill
Goodwill
69225000 USD
CY2021Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
56757000 USD
CY2020Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
49129000 USD
CY2021Q4 us-gaap Assets Noncurrent
AssetsNoncurrent
3627328000 USD
CY2020Q4 us-gaap Assets Noncurrent
AssetsNoncurrent
3433134000 USD
CY2021Q4 us-gaap Assets
Assets
4064604000 USD
CY2020Q4 us-gaap Assets
Assets
3756379000 USD
CY2021Q4 us-gaap Short Term Borrowings
ShortTermBorrowings
389500000 USD
CY2020Q4 us-gaap Short Term Borrowings
ShortTermBorrowings
304525000 USD
CY2021Q4 us-gaap Long Term Debt Current
LongTermDebtCurrent
345000 USD
CY2020Q4 us-gaap Long Term Debt Current
LongTermDebtCurrent
95344000 USD
CY2021Q4 us-gaap Accounts Payable Current
AccountsPayableCurrent
133486000 USD
CY2020Q4 us-gaap Accounts Payable Current
AccountsPayableCurrent
97966000 USD
CY2021Q4 us-gaap Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
15520000 USD
CY2020Q4 us-gaap Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
13812000 USD
CY2021Q4 us-gaap Interest Payable Current
InterestPayableCurrent
7503000 USD
CY2020Q4 us-gaap Interest Payable Current
InterestPayableCurrent
7441000 USD
CY2021Q4 us-gaap Regulatory Liability Current
RegulatoryLiabilityCurrent
112281000 USD
CY2020Q4 us-gaap Regulatory Liability Current
RegulatoryLiabilityCurrent
50362000 USD
CY2021Q4 us-gaap Derivative Liabilities Current
DerivativeLiabilitiesCurrent
10402000 USD
CY2020Q4 us-gaap Derivative Liabilities Current
DerivativeLiabilitiesCurrent
4198000 USD
CY2021Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
1296000 USD
CY2020Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
1105000 USD
CY2021Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
54432000 USD
CY2020Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
52330000 USD
CY2021Q4 us-gaap Liabilities Current
LiabilitiesCurrent
724765000 USD
CY2020Q4 us-gaap Liabilities Current
LiabilitiesCurrent
627083000 USD
CY2021Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
1044587000 USD
CY2020Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
860081000 USD
CY2021Q4 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
340231000 USD
CY2020Q4 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
319292000 USD
CY2021Q4 us-gaap Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
658332000 USD
CY2020Q4 us-gaap Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
639663000 USD
CY2021Q4 us-gaap Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
166684000 USD
CY2020Q4 us-gaap Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
217287000 USD
CY2021Q4 us-gaap Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
412000 USD
CY2020Q4 us-gaap Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
2852000 USD
CY2021Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
79468000 USD
CY2020Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
80621000 USD
CY2021Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
114979000 USD
CY2020Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
120767000 USD
CY2021Q4 us-gaap Deferred Credits And Other Liabilities Noncurrent
DeferredCreditsAndOtherLiabilitiesNoncurrent
1360106000 USD
CY2020Q4 us-gaap Deferred Credits And Other Liabilities Noncurrent
DeferredCreditsAndOtherLiabilitiesNoncurrent
1380482000 USD
CY2021Q4 us-gaap Commitments And Contingencies
CommitmentsAndContingencies
USD
CY2020Q4 us-gaap Commitments And Contingencies
CommitmentsAndContingencies
USD
CY2020Q4 us-gaap Common Stock No Par Value
CommonStockNoParValue
0
CY2021Q4 us-gaap Common Stock No Par Value
CommonStockNoParValue
0
CY2020Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
100000000 shares
CY2021Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
100000000 shares
CY2021Q4 us-gaap Common Stock Shares Outstanding
CommonStockSharesOutstanding
31129000 shares
CY2021Q4 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
31129000 shares
CY2020Q4 us-gaap Common Stock Shares Outstanding
CommonStockSharesOutstanding
30589000 shares
CY2020Q4 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
30589000 shares
CY2021Q4 us-gaap Common Stock Value
CommonStockValue
590771000 USD
CY2020Q4 us-gaap Common Stock Value
CommonStockValue
565112000 USD
CY2021Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
355779000 USD
CY2020Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
336523000 USD
CY2021Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-11404000 USD
CY2020Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-12902000 USD
CY2021Q4 us-gaap Stockholders Equity
StockholdersEquity
935146000 USD
CY2020Q4 us-gaap Stockholders Equity
StockholdersEquity
888733000 USD
CY2021Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
4064604000 USD
CY2020Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
3756379000 USD
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
762634000 USD
CY2019 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
59556000 USD
CY2019 us-gaap Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
1.90
CY2019 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
56833000 USD
CY2020 us-gaap Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
1.91
CY2020 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
58708000 USD
CY2019 us-gaap Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
2601000 USD
CY2019 us-gaap Stock Repurchased During Period Value
StockRepurchasedDuringPeriodValue
5085000 USD
CY2019 us-gaap Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
92956000 USD
CY2019 us-gaap Business Combination Consideration Transferred Equity Interests Issued And Issuable
BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
0 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 Stock Granted During Period Value Sharebased Compensation
StockGrantedDuringPeriodValueSharebasedCompensation
4361000 USD
CY2020 us-gaap Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
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
CY2021 us-gaap Net Income Loss
NetIncomeLoss
78666000 USD
CY2020 us-gaap Net Income Loss
NetIncomeLoss
76781000 USD
CY2019 us-gaap Net Income Loss
NetIncomeLoss
61735000 USD
CY2021 us-gaap Depreciation And Amortization
DepreciationAndAmortization
113534000 USD
CY2020 us-gaap Depreciation And Amortization
DepreciationAndAmortization
103683000 USD
CY2019 us-gaap Depreciation And Amortization
DepreciationAndAmortization
91496000 USD
CY2021 us-gaap Amortization Of Regulatory Asset
AmortizationOfRegulatoryAsset
13897000 USD
CY2020 us-gaap Amortization Of Regulatory Asset
AmortizationOfRegulatoryAsset
17779000 USD
CY2019 us-gaap Amortization Of Regulatory Asset
AmortizationOfRegulatoryAsset
19172000 USD
CY2021 us-gaap Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
14617000 USD
CY2020 us-gaap Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
18667000 USD
CY2019 us-gaap Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
6317000 USD
CY2021 us-gaap Pension Expense
PensionExpense
16556000 USD
CY2020 us-gaap Pension Expense
PensionExpense
18370000 USD
CY2019 us-gaap Pension Expense
PensionExpense
16497000 USD
CY2021 us-gaap Pension Contributions
PensionContributions
9590000 USD
CY2020 us-gaap Pension Contributions
PensionContributions
28980000 USD
CY2019 us-gaap Pension Contributions
PensionContributions
10970000 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
CY2019 us-gaap Other Increase Decrease In Environmental Liabilities
OtherIncreaseDecreaseInEnvironmentalLiabilities
-16226000 USD
CY2021 us-gaap Environmental Remediation Expense
EnvironmentalRemediationExpense
9938000 USD
CY2020 us-gaap Environmental Remediation Expense
EnvironmentalRemediationExpense
9691000 USD
CY2019 us-gaap Environmental Remediation Expense
EnvironmentalRemediationExpense
12337000 USD
CY2021 us-gaap Pension Expense Reversal Of Expense Noncash
PensionExpenseReversalOfExpenseNoncash
0 USD
CY2020 us-gaap Pension Expense Reversal Of Expense Noncash
PensionExpenseReversalOfExpenseNoncash
0 USD
CY2019 us-gaap Pension Expense Reversal Of Expense Noncash
PensionExpenseReversalOfExpenseNoncash
10500000 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
CY2019 us-gaap Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax
DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
0 USD
CY2021 us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
-11569000 USD
CY2020 us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
6942000 USD
CY2019 us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
-14760000 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
CY2019 us-gaap Increase Decrease In Accounts And Other Receivables
IncreaseDecreaseInAccountsAndOtherReceivables
-5844000 USD
CY2021 us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
14571000 USD
CY2020 us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
-1262000 USD
CY2019 us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
5969000 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
CY2019 us-gaap Increase Decrease In Accrued Taxes Payable
IncreaseDecreaseInAccruedTaxesPayable
4528000 USD
CY2021 us-gaap Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
12118000 USD
CY2020 us-gaap Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
-15910000 USD
CY2019 us-gaap Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
-16485000 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
CY2019 us-gaap Increase Decrease In Deferred Gas Cost
IncreaseDecreaseInDeferredGasCost
23471000 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
CY2019 us-gaap Increase Decrease In Regulatory Assets And Liabilities
IncreaseDecreaseInRegulatoryAssetsAndLiabilities
-655000 USD
CY2021 nwn Change In Decoupling Regulatory Deferral
ChangeInDecouplingRegulatoryDeferral
5206000 USD
CY2020 nwn Change In Decoupling Regulatory Deferral
ChangeInDecouplingRegulatoryDeferral
-2884000 USD
CY2019 nwn Change In Decoupling Regulatory Deferral
ChangeInDecouplingRegulatoryDeferral
-18661000 USD
CY2021 us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
26069000 USD
CY2020 us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
2925000 USD
CY2019 us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
4080000 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
CY2019 us-gaap Cash Provided By Used In Operating Activities Discontinued Operations
CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
712000 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
CY2019 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
186013000 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
CY2019 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
223471000 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
CY2019 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
56786000 USD
CY2021 us-gaap Operating Lease Payments Use
OperatingLeasePaymentsUse
1364000 USD
CY2020 us-gaap Operating Lease Payments Use
OperatingLeasePaymentsUse
7878000 USD
CY2019 us-gaap Operating Lease Payments Use
OperatingLeasePaymentsUse
18812000 USD
CY2021 us-gaap Proceeds From Sale Of Land Held For Use
ProceedsFromSaleOfLandHeldForUse
3926000 USD
CY2020 us-gaap Proceeds From Sale Of Land Held For Use
ProceedsFromSaleOfLandHeldForUse
8149000 USD
CY2019 us-gaap Proceeds From Sale Of Land Held For Use
ProceedsFromSaleOfLandHeldForUse
659000 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
CY2019 us-gaap Payments To Acquire Equity Method Investments
PaymentsToAcquireEquityMethodInvestments
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
CY2019 us-gaap Proceeds From Sale Of Equity Method Investments
ProceedsFromSaleOfEquityMethodInvestments
0 USD
CY2021 us-gaap Proceeds From Divestiture Of Businesses
ProceedsFromDivestitureOfBusinesses
0 USD
CY2020 us-gaap Proceeds From Divestiture Of Businesses
ProceedsFromDivestitureOfBusinesses
12500000 USD
CY2019 us-gaap Proceeds From Divestiture Of Businesses
ProceedsFromDivestitureOfBusinesses
0 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
CY2019 us-gaap Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
3544000 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
CY2019 us-gaap Cash Provided By Used In Investing Activities Discontinued Operations
CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
-1827000 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
CY2019 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-303781000 USD
CY2020 us-gaap Proceeds From Debt Maturing In More Than Three Months
ProceedsFromDebtMaturingInMoreThanThreeMonths
150000000 USD
CY2019 us-gaap Proceeds From Debt Maturing In More Than Three Months
ProceedsFromDebtMaturingInMoreThanThreeMonths
0 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
CY2019 us-gaap Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
92956000 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
CY2019 us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
175000000 USD
CY2021 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
95000000 USD
CY2020 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
75000000 USD
CY2019 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
30000000 USD
CY2021 us-gaap Proceeds From Debt Maturing In More Than Three Months
ProceedsFromDebtMaturingInMoreThanThreeMonths
100000000 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
CY2019 us-gaap Repayments Of Debt Maturing In More Than Three Months
RepaymentsOfDebtMaturingInMoreThanThreeMonths
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
CY2019 nwn Proceeds From Issuances Of Commercial Paper Maturities Greater Than90 Days
ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days
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
CY2019 nwn Repayments Of Commercial Paper Maturities Greater Than Three Months
RepaymentsOfCommercialPaperMaturitiesGreaterThanThreeMonths
0 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
CY2019 us-gaap Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
-68520000 USD
CY2021 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
55919000 USD
CY2020 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
55420000 USD
CY2019 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
53339000 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
CY2019 us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
-599000 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
CY2019 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
115498000 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
CY2019 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
-2270000 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
CY2018Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
14906000 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
CY2021 us-gaap Interest Paid Net
InterestPaidNet
43719000 USD
CY2020 us-gaap Interest Paid Net
InterestPaidNet
42651000 USD
CY2019 us-gaap Interest Paid Net
InterestPaidNet
41231000 USD
CY2021 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
10555000 USD
CY2020 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
13644000 USD
CY2019 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
-96000 USD
CY2021 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>
CY2021Q4 us-gaap Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
314579000 USD
CY2020Q4 us-gaap Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
348927000 USD
CY2021Q4 us-gaap Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
658332000 USD
CY2020Q4 us-gaap Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
639663000 USD
CY2021 nwn Weighted Average Depreciation Rates Transmission Distribution
WeightedAverageDepreciationRatesTransmissionDistribution
0.026
CY2021 nwn Weighted Average Depreciation Rates Utility Storage
WeightedAverageDepreciationRatesUtilityStorage
0.020
CY2021 nwn Weighted Average Depreciation Rates General Plant
WeightedAverageDepreciationRatesGeneralPlant
0.062
CY2021 nwn Weighted Average Depreciation Rates Intangible Other
WeightedAverageDepreciationRatesIntangibleOther
0.061
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
CY2019 us-gaap Public Utilities Allowance For Funds Used During Construction Rate
PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate
0.039
CY2021Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
18559000 USD
CY2020Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
30168000 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
CY2021Q4 us-gaap Unbilled Receivables Current
UnbilledReceivablesCurrent
82200000 USD
CY2020Q4 us-gaap Unbilled Receivables Current
UnbilledReceivablesCurrent
57900000 USD
CY2021 us-gaap Utilities Operating Expense Taxes
UtilitiesOperatingExpenseTaxes
34700000 USD
CY2020 us-gaap Utilities Operating Expense Taxes
UtilitiesOperatingExpenseTaxes
30300000 USD
CY2019 us-gaap Utilities Operating Expense Taxes
UtilitiesOperatingExpenseTaxes
30300000 USD
CY2020Q4 us-gaap Allowance For Doubtful Accounts Receivable
AllowanceForDoubtfulAccountsReceivable
3219000 USD
CY2021 us-gaap Allowance For Doubtful Accounts Receivable Period Increase Decrease
AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
724000 USD
CY2021 us-gaap Allowance For Doubtful Accounts Receivable Recoveries
AllowanceForDoubtfulAccountsReceivableRecoveries
1925000 USD
CY2021Q4 us-gaap Allowance For Doubtful Accounts Receivable
AllowanceForDoubtfulAccountsReceivable
2018000 USD
CY2021Q4 nwn Number Of Net Investments In Sales Type Leases
NumberOfNetInvestmentsInSalesTypeLeases
2 numberOfLeases
CY2021Q4 us-gaap Inventory Raw Materials And Supplies Net Of Reserves
InventoryRawMaterialsAndSuppliesNetOfReserves
19400000 USD
CY2020Q4 us-gaap Inventory Raw Materials And Supplies Net Of Reserves
InventoryRawMaterialsAndSuppliesNetOfReserves
18000000 USD
CY2021Q4 us-gaap Goodwill
Goodwill
70600000 USD
CY2020Q4 us-gaap Goodwill
Goodwill
69200000 USD
CY2021Q4 us-gaap Goodwill And Intangible Asset Impairment
GoodwillAndIntangibleAssetImpairment
0 USD
CY2021Q4 us-gaap Equity Method Investment Underlying Equity In Net Assets
EquityMethodInvestmentUnderlyingEquityInNetAssets
14500000 USD
CY2021 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
78666000 USD
CY2020 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
70273000 USD
CY2019 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
65311000 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
CY2019 us-gaap Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
-3576000 USD
CY2021 us-gaap Net Income Loss
NetIncomeLoss
78666000 USD
CY2020 us-gaap Net Income Loss
NetIncomeLoss
76781000 USD
CY2019 us-gaap Net Income Loss
NetIncomeLoss
61735000 USD
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
CY2019 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
29786000 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
CY2019 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
73000 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
CY2019 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
29859000 shares
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
CY2019 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
2.19
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
CY2019 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
2.19
CY2021 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.56
CY2020 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.51
CY2019 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.07
CY2021 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.56
CY2020 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.51
CY2019 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.07
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
CY2019 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
0 shares
CY2019Q4 us-gaap Assets Of Disposal Group Including Discontinued Operation
AssetsOfDisposalGroupIncludingDiscontinuedOperation
15100000 USD
CY2021Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
100000000 shares
CY2020Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
100000000 shares
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
CY2021Q4 us-gaap Lessor Sales Type Lease Term Of Contract1
LessorSalesTypeLeaseTermOfContract1
P30Y
CY2021Q4 us-gaap Lessor Sales Type Lease Renewal Term1
LessorSalesTypeLeaseRenewalTerm1
P50Y
CY2021Q4 us-gaap Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
98400000 USD
CY2021Q4 us-gaap Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
19700000 USD
CY2021Q4 us-gaap Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
18100000 USD
CY2021Q4 us-gaap Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
15700000 USD
CY2021Q4 us-gaap Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
13500000 USD
CY2021Q4 us-gaap Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
31400000 USD
CY2021Q4 us-gaap Lessor Sales Type Lease Term Of Contract1
LessorSalesTypeLeaseTermOfContract1
P30Y
CY2021Q4 us-gaap Lessor Sales Type Lease Renewal Term1
LessorSalesTypeLeaseRenewalTerm1
P50Y
CY2021 us-gaap Operating Lease Lease Income
OperatingLeaseLeaseIncome
80000 USD
CY2020 us-gaap Operating Lease Lease Income
OperatingLeaseLeaseIncome
88000 USD
CY2021 us-gaap Sales Type Lease Lease Income
SalesTypeLeaseLeaseIncome
17471000 USD
CY2020 us-gaap Sales Type Lease Lease Income
SalesTypeLeaseLeaseIncome
18355000 USD
CY2021 us-gaap Lease Income
LeaseIncome
17551000 USD
CY2020 us-gaap Lease Income
LeaseIncome
18443000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received Next Twelve Months
LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths
627000 USD
CY2021Q4 nwn Lease Paymentstobe Received Nexttwelvemonths
LeasePaymentstobeReceivedNexttwelvemonths
17653000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received Two Years
LessorOperatingLeasePaymentsToBeReceivedTwoYears
125000 USD
CY2021Q4 nwn Lease Paymentstobe Received Two Years
LeasePaymentstobeReceivedTwoYears
16682000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received Three Years
LessorOperatingLeasePaymentsToBeReceivedThreeYears
126000 USD
CY2021Q4 nwn Lease Paymentstobe Received Three Years
LeasePaymentstobeReceivedThreeYears
15993000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received Four Years
LessorOperatingLeasePaymentsToBeReceivedFourYears
119000 USD
CY2021Q4 nwn Lease Paymentstobe Received Four Years
LeasePaymentstobeReceivedFourYears
15425000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received Five Years
LessorOperatingLeasePaymentsToBeReceivedFiveYears
92000 USD
CY2021Q4 nwn Lease Paymentstobe Received Five Years
LeasePaymentstobeReceivedFiveYears
14993000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received Thereafter
LessorOperatingLeasePaymentsToBeReceivedThereafter
936000 USD
CY2021Q4 nwn Lease Paymentstobe Received Thereafter
LeasePaymentstobeReceivedThereafter
237756000 USD
CY2021Q4 us-gaap Lessor Operating Lease Payments To Be Received
LessorOperatingLeasePaymentsToBeReceived
2025000 USD
CY2021Q4 nwn Lease Paymentstobe Received
LeasePaymentstobeReceived
318502000 USD
CY2021Q4 us-gaap Residual Value Of Leased Asset
ResidualValueOfLeasedAsset
4700000 USD
CY2020Q4 us-gaap Residual Value Of Leased Asset
ResidualValueOfLeasedAsset
4300000 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
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
CY2020Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
77446000 USD
CY2020Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
1105000 USD
CY2020Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
80621000 USD
CY2020Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
81726000 USD
CY2021Q4 us-gaap Operating Lease Weighted Average Remaining Lease Term1
OperatingLeaseWeightedAverageRemainingLeaseTerm1
P18Y2M12D
CY2020Q4 us-gaap Operating Lease Weighted Average Remaining Lease Term1
OperatingLeaseWeightedAverageRemainingLeaseTerm1
P19Y2M12D
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Next Twelve Months
LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
6992000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
7019000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
7156000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
7191000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Five
LesseeOperatingLeaseLiabilityPaymentsDueYearFive
7359000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due After Year Five
LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
116449000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
152166000 USD
CY2021Q4 us-gaap Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
71402000 USD
CY2021Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
80764000 USD
CY2021Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
1296000 USD
CY2021Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
79468000 USD
CY2021Q4 us-gaap Finance Lease Liability Payments Due Next Twelve Months
FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
300000 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
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
CY2019 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
575000 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
CY2019 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
1597000 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
CY2019 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
430000 USD
CY2021Q4 us-gaap Short Term Borrowings
ShortTermBorrowings
389500000 USD
CY2020Q4 us-gaap Short Term Borrowings
ShortTermBorrowings
304500000 USD
CY2021Q4 us-gaap Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
0.011
CY2020Q4 us-gaap Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
0.012
CY2021 nwn Commercial Paper Maximum Maturity
CommercialPaperMaximumMaturity
P63D
CY2021 nwn Commercial Paper Average Maturity
CommercialPaperAverageMaturity
P34D
CY2021Q4 us-gaap Long Term Debt
LongTermDebt
1044900000 USD
CY2020Q4 us-gaap Long Term Debt
LongTermDebt
955400000 USD
CY2021Q4 us-gaap Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
8300000 USD
CY2021Q4 us-gaap Ratio Of Indebtedness To Net Capital1
RatioOfIndebtednessToNetCapital1
0.605
CY2021Q4 us-gaap Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
1053241000 USD
CY2020Q4 us-gaap Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
962905000 USD
CY2021Q4 us-gaap Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
8309000 USD
CY2020Q4 us-gaap Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
7480000 USD
CY2021Q4 us-gaap Long Term Debt
LongTermDebt
1044932000 USD
CY2020Q4 us-gaap Long Term Debt
LongTermDebt
955425000 USD
CY2021Q4 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
1174500000 USD
CY2020Q4 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
1136311000 USD
CY2020Q4 nwn Defined Benefit Plan Health Care Cost Trend Rate Assumed Thereafter
DefinedBenefitPlanHealthCareCostTrendRateAssumedThereafter
0.0650
CY2021Q4 nwn Defined Benefit Plan Health Care Cost Trend Rate Assumed Thereafter
DefinedBenefitPlanHealthCareCostTrendRateAssumedThereafter
0.0350
CY2021Q4 us-gaap Defined Benefit Plan Ultimate Health Care Cost Trend Rate1
DefinedBenefitPlanUltimateHealthCareCostTrendRate1
0.0475
CY2021 us-gaap Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate
DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate
2026
CY2020 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
16077000 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
CY2019 us-gaap Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
16370000 USD
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
CY2019 us-gaap Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
4422000 USD
CY2021 nwn Differences Regulatory Commission
DifferencesRegulatoryCommission
-4655000 USD
CY2020 nwn Differences Regulatory Commission
DifferencesRegulatoryCommission
-3960000 USD
CY2019 nwn Differences Regulatory Commission
DifferencesRegulatoryCommission
-5772000 USD
CY2021 nwn Regulatory Settlement
RegulatorySettlement
0 USD
CY2020 nwn Regulatory Settlement
RegulatorySettlement
0 USD
CY2019 nwn Regulatory Settlement
RegulatorySettlement
-1129000 USD
CY2021 us-gaap Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
-176000 USD
CY2020 us-gaap Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
-532000 USD
CY2019 us-gaap Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
-1249000 USD
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
27406000 USD
CY2020 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
21082000 USD
CY2019 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
12642000 USD
CY2021 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.258
CY2020 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.231
CY2019 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.162
CY2021 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
6508000 USD
CY2020 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
10106000 USD
CY2019 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
5530000 USD
CY2021 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
6281000 USD
CY2020 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
5971000 USD
CY2019 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
1667000 USD
CY2021 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
12789000 USD
CY2019 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
7197000 USD
CY2021 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
8289000 USD
CY2020 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
2888000 USD
CY2019 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
1515000 USD
CY2021 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
6328000 USD
CY2020 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
2117000 USD
CY2019 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
3930000 USD
CY2021 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
14617000 USD
CY2020 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
5005000 USD
CY2019 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
5445000 USD
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
27406000 USD
CY2020 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
21082000 USD
CY2019 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
12642000 USD
CY2021Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
310471000 USD
CY2020Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
297078000 USD
CY2021Q4 us-gaap Deferred Tax Liabilities Leasing Arrangements
DeferredTaxLiabilitiesLeasingArrangements
38123000 USD
CY2020Q4 us-gaap Deferred Tax Liabilities Leasing Arrangements
DeferredTaxLiabilitiesLeasingArrangements
39396000 USD
CY2021Q4 nwn Deferred Tax Liabilities Lease Right Of Use Assets
DeferredTaxLiabilitiesLeaseRightOfUseAssets
21362000 USD
CY2020Q4 nwn Deferred Tax Liabilities Lease Right Of Use Assets
DeferredTaxLiabilitiesLeaseRightOfUseAssets
21613000 USD
CY2021Q4 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
7793000 USD
CY2020Q4 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
0 USD
CY2021Q4 us-gaap Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
415664000 USD
CY2020Q4 us-gaap Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
400257000 USD
CY2021Q4 nwn Deferred Tax Assets Lease Liabilities
DeferredTaxAssetsLeaseLiabilities
21376000 USD
CY2020Q4 nwn Deferred Tax Assets Lease Liabilities
DeferredTaxAssetsLeaseLiabilities
21622000 USD
CY2021Q4 us-gaap Deferred Tax Assets Goodwill And Intangible Assets
DeferredTaxAssetsGoodwillAndIntangibleAssets
3484000 USD
CY2020Q4 us-gaap Deferred Tax Assets Goodwill And Intangible Assets
DeferredTaxAssetsGoodwillAndIntangibleAssets
4485000 USD
CY2021Q4 us-gaap Deferred Tax Assets Tax Credit Carryforwards Other
DeferredTaxAssetsTaxCreditCarryforwardsOther
126000 USD
CY2020Q4 us-gaap Deferred Tax Assets Tax Credit Carryforwards Other
DeferredTaxAssetsTaxCreditCarryforwardsOther
861000 USD
CY2021Q4 us-gaap Deferred Tax Assets Other
DeferredTaxAssetsOther
0 USD
CY2020Q4 us-gaap Deferred Tax Assets Other
DeferredTaxAssetsOther
1407000 USD
CY2021Q4 us-gaap Deferred Tax Assets Net
DeferredTaxAssetsNet
75433000 USD
CY2020Q4 us-gaap Deferred Tax Assets Net
DeferredTaxAssetsNet
80965000 USD
CY2021Q4 us-gaap Deferred Tax Liabilities
DeferredTaxLiabilities
340231000 USD
CY2020Q4 us-gaap Deferred Tax Liabilities
DeferredTaxLiabilities
319292000 USD
CY2021Q4 us-gaap Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax
DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
100000 USD
CY2020Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
0 USD
CY2019Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
0 USD
CY2021Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
0 USD
CY2021Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
2871370000 USD
CY2020Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
2654770000 USD
CY2021Q4 nwn Property Plant Equipmentnoncash
PropertyPlantEquipmentnoncash
38333000 USD
CY2020Q4 nwn Property Plant Equipmentnoncash
PropertyPlantEquipmentnoncash
25129000 USD
CY2021Q4 us-gaap Life Insurance Corporate Or Bank Owned Amount
LifeInsuranceCorporateOrBankOwnedAmount
48178000 USD
CY2020Q4 us-gaap Life Insurance Corporate Or Bank Owned Amount
LifeInsuranceCorporateOrBankOwnedAmount
49241000 USD
CY2021Q4 us-gaap Equity Method Investments
EquityMethodInvestments
26608000 USD
CY2020Q4 us-gaap Equity Method Investments
EquityMethodInvestments
34484000 USD
CY2021Q4 us-gaap Equity Method Investment Aggregate Cost
EquityMethodInvestmentAggregateCost
14492000 USD
CY2020Q4 us-gaap Equity Method Investment Aggregate Cost
EquityMethodInvestmentAggregateCost
18000 USD
CY2021Q4 us-gaap Other Long Term Investments
OtherLongTermInvestments
89278000 USD
CY2020Q4 us-gaap Other Long Term Investments
OtherLongTermInvestments
83743000 USD
CY2021Q4 nwn Total Cumulative Gas Reserves Investment
TotalCumulativeGasReservesInvestment
188000000 USD
CY2021Q4 us-gaap Goodwill
Goodwill
70600000 USD
CY2020Q4 us-gaap Goodwill
Goodwill
69200000 USD
CY2021 us-gaap Goodwill Impairment Loss
GoodwillImpairmentLoss
0 USD
CY2021 us-gaap Derivative Gain On Derivative
DerivativeGainOnDerivative
50900000 USD
CY2020 us-gaap Derivative Gain On Derivative
DerivativeGainOnDerivative
2300000 USD
CY2021Q4 us-gaap Derivative Fair Value Of Derivative Net
DerivativeFairValueOfDerivativeNet
48000000 USD
CY2020Q4 us-gaap Derivative Fair Value Of Derivative Net
DerivativeFairValueOfDerivativeNet
12800000 USD
CY2021Q4 nwn Site Contingency Numberof Remediation Projects
SiteContingencyNumberofRemediationProjects
2
CY2021 nwn Insurance Proceeds Amortization Period
InsuranceProceedsAmortizationPeriod
P10Y6M
CY2021Q4 nwn Insurance Proceeds Applied To Prudently Incurred Remediation Costs
InsuranceProceedsAppliedToPrudentlyIncurredRemediationCosts
3600000 USD
CY2021 nwn Cost Recovery Period
CostRecoveryPeriod
P3Y
CY2021 nwn Total Dividends Paid To Registrant Consolidated Subsidiaries
TotalDividendsPaidToRegistrantConsolidatedSubsidiaries
82100000 USD
CY2020 nwn Total Dividends Paid To Registrant Consolidated Subsidiaries
TotalDividendsPaidToRegistrantConsolidatedSubsidiaries
74400000 USD
CY2019 nwn Total Dividends Paid To Registrant Consolidated Subsidiaries
TotalDividendsPaidToRegistrantConsolidatedSubsidiaries
88400000 USD
CY2020Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
3219000 USD
CY2021 us-gaap Valuation Allowances And Reserves Charged To Cost And Expense
ValuationAllowancesAndReservesChargedToCostAndExpense
724000 USD
CY2021 us-gaap Valuation Allowances And Reserves Charged To Other Accounts
ValuationAllowancesAndReservesChargedToOtherAccounts
-219000 USD
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
CY2018Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
977000 USD
CY2019 us-gaap Valuation Allowances And Reserves Charged To Cost And Expense
ValuationAllowancesAndReservesChargedToCostAndExpense
450000 USD
CY2019 us-gaap Valuation Allowances And Reserves Charged To Other Accounts
ValuationAllowancesAndReservesChargedToOtherAccounts
0 USD
CY2019 us-gaap Valuation Allowances And Reserves Deductions
ValuationAllowancesAndReservesDeductions
754000 USD
CY2019Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
673000 USD

Files In Submission

Name View Source Status
0001733998-22-000005-index-headers.html Edgar Link pending
0001733998-22-000005-index.html Edgar Link pending
0001733998-22-000005.txt Edgar Link pending
0001733998-22-000005-xbrl.zip Edgar Link pending
ex10ll-2022nwngsaipplandoc.htm Edgar Link pending
ex10o-executiveannualincen.htm Edgar Link pending
ex10w-2022x2024pspgrantagr.htm Edgar Link pending
ex10z-2022rsuofficergranta.htm Edgar Link pending
ex2112312021.htm Edgar Link pending
ex23a2021consentofpublicac.htm Edgar Link pending
ex23b2021consentofpublicac.htm Edgar Link pending
ex311q42021_ceo.htm Edgar Link pending
ex312q42021_cfo.htm Edgar Link pending
ex313q42021_ceo.htm Edgar Link pending
ex314q42021_cfo.htm Edgar Link pending
ex321q42021_ceocfo.htm Edgar Link pending
ex322q42021_ceocfo.htm Edgar Link pending
ex3c-nw_holdingsxamendedxa.htm Edgar Link pending
ex3d-nw_naturalxamendedxan.htm Edgar Link pending
FilingSummary.xml Edgar Link unprocessable
Financial_Report.xlsx Edgar Link pending
image.jpg Edgar Link pending
image1.jpg Edgar Link pending
image2.jpg Edgar Link pending
image3.jpg Edgar Link pending
MetaLinks.json Edgar Link pending
nwn-20211231.htm Edgar Link pending
nwn-20211231.xsd Edgar Link pending
nwn-20211231_cal.xml Edgar Link unprocessable
nwn-20211231_def.xml Edgar Link unprocessable
nwn-20211231_g1.jpg Edgar Link pending
nwn-20211231_g2.jpg Edgar Link pending
nwn-20211231_htm.xml Edgar Link completed
nwn-20211231_lab.xml Edgar Link unprocessable
nwn-20211231_pre.xml Edgar Link unprocessable
R1.htm Edgar Link pending
R10.htm Edgar Link pending
R11.htm Edgar Link pending
R12.htm Edgar Link pending
R13.htm Edgar Link pending
R14.htm Edgar Link pending
R15.htm Edgar Link pending
R16.htm Edgar Link pending
R17.htm Edgar Link pending
R18.htm Edgar Link pending
R19.htm Edgar Link pending
R2.htm Edgar Link pending
R20.htm Edgar Link pending
R21.htm Edgar Link pending
R22.htm Edgar Link pending
R23.htm Edgar Link pending
R24.htm Edgar Link pending
R25.htm Edgar Link pending
R26.htm Edgar Link pending
R27.htm Edgar Link pending
R28.htm Edgar Link pending
R29.htm Edgar Link pending
R3.htm Edgar Link pending
R30.htm Edgar Link pending
R31.htm Edgar Link pending
R32.htm Edgar Link pending
R33.htm Edgar Link pending
R34.htm Edgar Link pending
R35.htm Edgar Link pending
R36.htm Edgar Link pending
R37.htm Edgar Link pending
R38.htm Edgar Link pending
R39.htm Edgar Link pending
R4.htm Edgar Link pending
R40.htm Edgar Link pending
R41.htm Edgar Link pending
R42.htm Edgar Link pending
R43.htm Edgar Link pending
R44.htm Edgar Link pending
R45.htm Edgar Link pending
R46.htm Edgar Link pending
R47.htm Edgar Link pending
R48.htm Edgar Link pending
R49.htm Edgar Link pending
R5.htm Edgar Link pending
R50.htm Edgar Link pending
R51.htm Edgar Link pending
R52.htm Edgar Link pending
R53.htm Edgar Link pending
R54.htm Edgar Link pending
R55.htm Edgar Link pending
R56.htm Edgar Link pending
R57.htm Edgar Link pending
R58.htm Edgar Link pending
R59.htm Edgar Link pending
R6.htm Edgar Link pending
R60.htm Edgar Link pending
R61.htm Edgar Link pending
R62.htm Edgar Link pending
R63.htm Edgar Link pending
R64.htm Edgar Link pending
R65.htm Edgar Link pending
R66.htm Edgar Link pending
R67.htm Edgar Link pending
R68.htm Edgar Link pending
R69.htm Edgar Link pending
R7.htm Edgar Link pending
R70.htm Edgar Link pending
R71.htm Edgar Link pending
R72.htm Edgar Link pending
R73.htm Edgar Link pending
R74.htm Edgar Link pending
R75.htm Edgar Link pending
R76.htm Edgar Link pending
R77.htm Edgar Link pending
R78.htm Edgar Link pending
R79.htm Edgar Link pending
R8.htm Edgar Link pending
R80.htm Edgar Link pending
R81.htm Edgar Link pending
R82.htm Edgar Link pending
R83.htm Edgar Link pending
R84.htm Edgar Link pending
R85.htm Edgar Link pending
R86.htm Edgar Link pending
R87.htm Edgar Link pending
R9.htm Edgar Link pending
R9999.htm Edgar Link pending
report.css Edgar Link pending
Show.js Edgar Link pending