$BKH
BLACK HILLS CORP /SD/ Stock $bkh

$bkh Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000113046422000004 Filed on February 15, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$562.5M	$1.949B	$486.4M
YoY Change	15.65%	14.86%	1.83%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin		$9.655M
YoY Change		50.86%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$61.08M	$236.0M	$55.10M
YoY Change	10.86%	5.12%	0.92%
% of Gross Profit
Operating Expenses	$448.5M	$1.540B	$360.4M
YoY Change	24.45%	21.36%	1.15%
Operating Profit		$409.4M
YoY Change		-4.41%
Interest Expense	-$38.58M	$152.4M	-$36.40M
YoY Change	6.0%	6.23%	18.95%
% of Operating Profit		37.22%
Other Income/Expense, Net	-$231.0K	-$151.0M	-$1.600M
YoY Change	-85.56%	-1.06%	-84.62%
Pretax Income	$75.16M	$258.4M	$87.90M
YoY Change	-14.49%	-6.26%	9.33%
Income Tax	$836.0K	$7.169M	$7.400M
% Of Pretax Income	1.11%	2.77%	8.42%
Net Earnings	$71.16M	$236.7M	$77.20M
YoY Change	-7.83%	4.01%	11.59%
Net Earnings / Revenue	12.65%	12.15%	15.87%
Basic Earnings Per Share		$3.74
Diluted Earnings Per Share	$1.109M	$3.74	$1.231M
COMMON SHARES
Basic Shares Outstanding	63.82M shares	63.22M shares	62.75M shares
Diluted Shares Outstanding		63.33M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$8.921M	$8.921M	$6.400M
YoY Change	39.39%	39.39%	-34.69%
Cash & Equivalents	$8.921M	$8.921M	$6.356M
Short-Term Investments
Other Short-Term Assets	$29.01M	$451.3M	$26.22M
YoY Change	10.64%	114.7%	-0.97%
Inventory	$151.0M	$151.0M	$117.4M
Prepaid Expenses
Receivables	$321.7M	$178.9M	$266.0M
Other Receivables	$18.02M	$18.02M	$19.40M
Total Short-Term Assets	$808.1M	$808.1M	$493.3M
YoY Change	63.82%	63.82%	4.25%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.449B	$6.449B	$6.020B
YoY Change	7.13%	7.06%	9.39%
Goodwill	$1.299B		$1.299B
YoY Change	0.0%		0.0%
Intangibles	$10.77M		$11.94M
YoY Change	-9.83%		-9.97%
Long-Term Investments		$15.48M
YoY Change
Other Assets	$38.05M	$548.9M	$37.80M
YoY Change	0.67%	110.95%	-8.48%
Total Long-Term Assets	$8.324B	$8.324B	$7.595B
YoY Change	9.59%	9.59%	7.2%
TOTAL ASSETS
Total Short-Term Assets	$808.1M	$808.1M	$493.3M
Total Long-Term Assets	$8.324B	$8.324B	$7.595B
Total Assets	$9.132B	$9.132B	$8.089B
YoY Change	12.9%	12.9%	7.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$217.8M	$217.8M	$183.3M
YoY Change	18.77%	18.8%	-5.26%
Accrued Expenses	$244.8M	$145.1M	$243.6M
YoY Change	0.47%	0.53%	7.43%
Deferred Revenue
YoY Change
Short-Term Debt	$420.2M	$420.2M	$234.0M
YoY Change	79.53%	79.56%	-33.04%
Long-Term Debt Due	$0.00	$0.00	$8.436M
YoY Change	-100.0%	-100.0%	46.89%
Total Short-Term Liabilities	$901.7M	$901.7M	$696.5M
YoY Change	29.46%	29.46%	-14.15%
LONG-TERM LIABILITIES
Long-Term Debt	$4.127B	$4.127B	$3.528B
YoY Change	16.97%	16.97%	12.36%
Other Long-Term Liabilities	$141.4M	$750.7M	$134.7M
YoY Change	5.03%	-37.52%	8.03%
Total Long-Term Liabilities	$4.268B	$4.878B	$3.663B
YoY Change	16.53%	3.13%	12.19%
TOTAL LIABILITIES
Total Short-Term Liabilities	$901.7M	$901.7M	$696.5M
Total Long-Term Liabilities	$4.268B	$4.878B	$3.663B
Total Liabilities	$5.170B	$6.345B	$4.359B
YoY Change	18.6%	14.79%	6.95%
SHAREHOLDERS EQUITY
Retained Earnings	$962.5M		$870.7M
YoY Change	10.53%		11.81%
Common Stock	$64.79M		$62.83M
YoY Change	3.13%		2.19%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.509M		$2.119M
YoY Change	65.6%		693.63%
Treasury Stock Shares	54.08K shares		32.49K shares
Shareholders Equity	$2.787B	$2.787B	$2.561B
YoY Change
Total Liabilities & Shareholders Equity	$9.132B	$9.132B	$8.089B
YoY Change	12.9%	12.9%	7.02%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$71.16M	$236.7M	$77.20M
YoY Change	-7.83%	4.01%	11.59%
Depreciation, Depletion And Amortization	$61.08M	$236.0M	$55.10M
YoY Change	10.86%	5.12%	0.92%
Cash From Operating Activities	$80.20M	-$64.57M	$122.4M
YoY Change	-34.48%	-111.92%	2.51%
INVESTING ACTIVITIES
Capital Expenditures	-$179.6M	$677.5M	-$231.4M
YoY Change	-22.37%	-11.72%	2.43%
Acquisitions
YoY Change
Other Investing Activities	-$481.0K	-$13.26M	-$600.0K
YoY Change	-19.83%	131.05%	-120.69%
Cash From Investing Activities	-$180.1M	-$664.2M	-$232.0M
YoY Change	-22.36%	-12.79%	4.08%
FINANCING ACTIVITIES
Cash Dividend Paid		$145.0M
YoY Change		7.08%
Common Stock Issuance & Retirement, Net		$119.0M
YoY Change		19.84%
Debt Paid & Issued, Net		$8.436M
YoY Change		-1.87%
Cash From Financing Activities	98.80M	$731.9M	109.1M
YoY Change	-9.44%	237.45%	8.67%
NET CHANGE
Cash From Operating Activities	80.20M	-$64.57M	122.4M
Cash From Investing Activities	-180.1M	-$664.2M	-232.0M
Cash From Financing Activities	98.80M	$731.9M	109.1M
Net Change In Cash	-1.124M	$3.071M	-500.0K
YoY Change	124.8%	-205.21%	-83.87%
FREE CASH FLOW
Cash From Operating Activities	$80.20M	-$64.57M	$122.4M
Capital Expenditures	-$179.6M	$677.5M	-$231.4M
Free Cash Flow	$259.8M	-$742.1M	$353.8M
YoY Change	-26.56%	229.01%	2.46%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001130464
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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	Entity Registrant Name EntityRegistrantName	BLACK HILLS CORPORATION
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	SD
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	46-0458824
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	7001 Mount Rushmore Road
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-31303
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Rapid City
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	SD
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	57702
CY2021	dei	City Area Code CityAreaCode	605
CY2021	dei	Local Phone Number LocalPhoneNumber	721-1700
CY2021	dei	Security12b Title Security12bTitle	Common stock of $1.00 par value
CY2021	dei	Trading Symbol TradingSymbol	BKH
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
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	64738725	shares
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	4135954577	USD
CY2021	dei	Auditor Name AuditorName	DELOITTE & TOUCHE LLP
CY2021	dei	Auditor Location AuditorLocation	Minneapolis, Minnesota
CY2021	us-gaap	Revenues Revenues	1949102000	USD
CY2020	us-gaap	Revenues Revenues	1696941000	USD
CY2019	us-gaap	Revenues Revenues	1734900000	USD
CY2021	bkh	Fuel Purchased Power And Cost Of Gas Sold FuelPurchasedPowerAndCostOfGasSold	741934000	USD
CY2020	bkh	Fuel Purchased Power And Cost Of Gas Sold FuelPurchasedPowerAndCostOfGasSold	492404000	USD
CY2019	bkh	Fuel Purchased Power And Cost Of Gas Sold FuelPurchasedPowerAndCostOfGasSold	570829000	USD
CY2021	bkh	Operating Expense Maintenance Operationsand Other Costsand Expense OperatingExpenseMaintenanceOperationsandOtherCostsandExpense	501690000	USD
CY2020	bkh	Operating Expense Maintenance Operationsand Other Costsand Expense OperatingExpenseMaintenanceOperationsandOtherCostsandExpense	495404000	USD
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CY2021	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	60096000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	56373000	USD
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CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7169000	USD
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CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14516000	USD
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CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	63219000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62378000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60662000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63325000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62439000	shares
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CY2021	us-gaap	Profit Loss ProfitLoss	251260000	USD
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CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7262000	USD
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CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3739000	USD
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CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	244006000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	230917000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	195571000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8921000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6356000	USD
CY2021Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	4889000	USD
CY2020Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	4383000	USD
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CY2021Q4	us-gaap	Inventory Net InventoryNet	150979000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	117400000	USD
CY2021Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	4373000	USD
CY2020Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1848000	USD
CY2021Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	18017000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	19446000	USD
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	270290000	USD
CY2020Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	51676000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	29012000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	26221000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	808133000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	493291000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7856573000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7305530000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1407397000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1285816000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6449176000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6019714000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	1299454000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1299454000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	10770000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	11944000	USD
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	526309000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	226582000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	38054000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	37801000	USD
CY2021Q4	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	1874587000	USD
CY2020Q4	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	1575781000	USD
CY2021Q4	us-gaap	Assets Assets	9131896000	USD
CY2020Q4	us-gaap	Assets Assets	8088786000	USD
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	217761000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	244759000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	183340000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	243612000	USD
CY2021Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	1439000	USD
CY2020Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	2044000	USD
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	17574000	USD
CY2020Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	25061000	USD
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	420180000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	234040000	USD
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	8436000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	901713000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	696533000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4126923000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3528100000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	465388000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	408624000	USD
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	485377000	USD
CY2020Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	507659000	USD
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	123925000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	150556000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	141447000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	134667000	USD
CY2021Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	1216137000	USD
CY2020Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	1201506000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	64793095	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	62827179	shares
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	64793000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	62827000	USD
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1783436000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1657285000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	962458000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	870738000	USD
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	54078	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	32492	shares
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3509000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2119000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-20084000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-27346000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2787094000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2561385000	USD
CY2021Q4	us-gaap	Noncontrolling Interest In Variable Interest Entity NoncontrollingInterestInVariableInterestEntity	100029000	USD
CY2020Q4	us-gaap	Noncontrolling Interest In Variable Interest Entity NoncontrollingInterestInVariableInterestEntity	101262000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2887123000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2662647000	USD
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CY2020	us-gaap	Profit Loss ProfitLoss	242763000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	213322000	USD
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CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	224457000	USD
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CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	7883000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	7838000	USD
CY2021	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	6859000	USD
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	19741000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	9655000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	5373000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	12095000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7261000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	38091000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	38020000	USD
CY2021	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	9590000	USD
CY2020	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	11997000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	12406000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-7018000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-11669000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-16485000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	35707000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2755000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2052000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable And Other Operating Assets IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets	43170000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable And Other Operating Assets IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets	10843000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable And Other Operating Assets IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets	-7578000	USD
CY2021	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	10660000	USD
CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	24659000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-34906000	USD
CY2021	us-gaap	Increase Decrease In Other Regulatory Assets IncreaseDecreaseInOtherRegulatoryAssets	514687000	USD
CY2020	us-gaap	Increase Decrease In Other Regulatory Assets IncreaseDecreaseInOtherRegulatoryAssets	5047000	USD
CY2019	us-gaap	Increase Decrease In Other Regulatory Assets IncreaseDecreaseInOtherRegulatoryAssets	-23619000	USD
CY2021	us-gaap	Increase Decrease In Regulatory Liabilities IncreaseDecreaseInRegulatoryLiabilities	-9533000	USD
CY2020	us-gaap	Increase Decrease In Regulatory Liabilities IncreaseDecreaseInRegulatoryLiabilities	-10706000	USD
CY2019	us-gaap	Increase Decrease In Regulatory Liabilities IncreaseDecreaseInRegulatoryLiabilities	-15158000	USD
CY2021	us-gaap	Pension Contributions PensionContributions	0	USD
CY2020	us-gaap	Pension Contributions PensionContributions	12700000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	12700000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-167000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-4653000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-6001000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-64565000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	541863000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	505513000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	677492000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	767404000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	818376000	USD
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-13262000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-5740000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2166000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-664230000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-761664000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-816210000	USD
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	145023000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	135439000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	124647000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	118979000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	99278000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	101358000	USD
CY2021	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	800000000	USD
CY2020	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	0	USD
CY2019	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	0	USD
CY2021	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	800000000	USD
CY2020	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	0	USD
CY2019	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	0	USD
CY2021	bkh	Net Borrowings Payments Of Revolving Credit Facility And Cp Program NetBorrowingsPaymentsOfRevolvingCreditFacilityAndCPProgram	186140000	USD
CY2020	bkh	Net Borrowings Payments Of Revolving Credit Facility And Cp Program NetBorrowingsPaymentsOfRevolvingCreditFacilityAndCPProgram	-115460000	USD
CY2019	bkh	Net Borrowings Payments Of Revolving Credit Facility And Cp Program NetBorrowingsPaymentsOfRevolvingCreditFacilityAndCPProgram	163880000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	600000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	400000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1100000000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	8436000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	8597000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	905743000	USD
CY2021	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	15749000	USD
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	15839000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	17901000	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-4045000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-7061000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-16737000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	731866000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	216882000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	300210000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	3071000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-2919000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-10487000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10739000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13658000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	24145000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13810000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10739000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13658000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	142685000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	136549000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	131774000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1521000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-2172000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-4682000	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	68758000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	72215000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	91491000	USD
CY2021	bkh	Non Cash Revision To Capitalized Asset Retirement Costs NonCashRevisionToCapitalizedAssetRetirementCosts	2109000	USD
CY2020	bkh	Non Cash Revision To Capitalized Asset Retirement Costs NonCashRevisionToCapitalizedAssetRetirementCosts	4774000	USD
CY2019	bkh	Non Cash Revision To Capitalized Asset Retirement Costs NonCashRevisionToCapitalizedAssetRetirementCosts	5044000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2287423000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	213322000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3739000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.05
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	124647000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	7076000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	100000000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1182000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	-327000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	17901000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2464069000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	242763000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3309000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.17
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	135439000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	5194000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	100000000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1203000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	15839000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2662647000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	251260000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7262000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.29
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	145023000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	8020000	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	119924000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1217000	USD
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	1000	USD
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	15749000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2887123000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:120%">Use of Estimates and Basis of Presentation</span></div><div><span><br/></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 GAAP requires management to make estimates and assumptions that affect the reported amounts of certain assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Changes in facts and circumstances or additional information may result in revised estimates and actual results could differ materially from those estimates.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:120%">COVID-19 Pandemic</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">In March 2020, the World Health Organization categorized COVID-19 as a pandemic and the President of the United States declared the outbreak a national emergency. The U.S. government has deemed electric and natural gas utilities to be critical infrastructure sectors that provide essential services during this emergency. As a provider of essential services, the Company has an obligation to provide services to our customers. The Company remains focused on protecting the health of our customers, employees and the communities in which we operate while assuring the continuity of our business operations.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The Company’s Consolidated Financial Statements reflect estimates and assumptions made by management that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and reported amounts of revenue and expenses during the reporting periods presented. The Company considered the impacts of COVID-19 on the assumptions and estimates used and determined that, for the years ended December 31, 2021 and 2020, there were no material adverse impacts on the Company’s results of operations.</span></div>
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2113000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	7003000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	321652000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	265961000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	7003000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2444000	USD
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	3560000	USD
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	10894000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2113000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2444000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	8927000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	4728000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	9096000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	7003000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3209000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	5795000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	3942000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	10502000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2444000	USD
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	86400000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	85250000	USD
CY2021Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	1267000	USD
CY2020Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	1531000	USD
CY2021Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	63312000	USD
CY2020Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	30619000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	150979000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	117400000	USD
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CY2019Q3	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	20000000	USD
CY2020Q1	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	6900000	USD
CY2021Q4	us-gaap	Long Term Investments LongTermInvestments	15481000	USD
CY2020Q4	us-gaap	Long Term Investments LongTermInvestments	15810000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	1299454000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	11944000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	13266000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	14337000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1174000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1322000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1071000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	10770000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	11944000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	13266000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1200000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1200000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1200000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1200000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1200000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	74387000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	77806000	USD
CY2021Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	50874000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	47105000	USD
CY2021Q4	bkh	Customer Depositsand Prepayments CustomerDepositsandPrepayments	48814000	USD
CY2020Q4	bkh	Customer Depositsand Prepayments CustomerDepositsandPrepayments	52185000	USD
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CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	31520000	USD
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CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	34996000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	244759000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	243612000	USD
CY2021Q4	us-gaap	Regulatory Assets RegulatoryAssets	797000000	USD
CY2020Q4	us-gaap	Regulatory Assets RegulatoryAssets	278000000	USD
CY2021Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	503000000	USD
CY2020Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	533000000	USD
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CY2020	us-gaap	Net Income Loss NetIncomeLoss	227608000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	199310000	USD
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CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62378000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60662000	shares
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CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	136000	shares
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CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62439000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	60798000	shares
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CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.28
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CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	60000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1000	shares
CY2021Q4	us-gaap	Regulatory Assets RegulatoryAssets	796599000	USD
CY2020Q4	us-gaap	Regulatory Assets RegulatoryAssets	278258000	USD
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	270290000	USD
CY2020Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	51676000	USD
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	526309000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	226582000	USD
CY2021Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	502951000	USD
CY2020Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	532720000	USD
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	17574000	USD
CY2020Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	25061000	USD
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	485377000	USD
CY2020Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	507659000	USD
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CY2021Q4	bkh	Unrecorded Unconditional Purchase Obligation Due Within Two Years UnrecordedUnconditionalPurchaseObligationDueWithinTwoYears	12012500	MMBTU
CY2021Q4	bkh	Unrecorded Unconditional Purchase Obligation Due Within Three Years UnrecordedUnconditionalPurchaseObligationDueWithinThreeYears	8220000	MMBTU
CY2021Q4	bkh	Unrecorded Unconditional Purchase Obligation Due Within Four Years UnrecordedUnconditionalPurchaseObligationDueWithinFourYears	4560000	MMBTU
CY2021Q4	bkh	Unrecorded Unconditional Purchase Obligation Due Within Five Years UnrecordedUnconditionalPurchaseObligationDueWithinFiveYears	0	MMBTU
CY2021Q4	bkh	Unrecorded Unconditional Purchase Obligation Dueafter Five Yearsa UnrecordedUnconditionalPurchaseObligationDueafterFiveYearsa	0	MMBTU
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	2173000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	2204000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	2125000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	2070000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	1881000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	51233000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	61686000	USD
CY2021Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	426425000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1930834000	USD
CY2021	us-gaap	Revenues Revenues	1949102000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1930834000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1680804000	USD
CY2020	us-gaap	Revenues Revenues	1696941000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1680804000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1726392000	USD
CY2019	us-gaap	Revenues Revenues	1734900000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1726392000	USD
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CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	26878000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	24809000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4126923000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3528100000	USD
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CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	600000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
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CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2109000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	75544000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	64205000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5999000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	317000	USD
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CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-1225000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	71431000	USD
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CY2021Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	27209000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	234040000	USD
CY2020Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	24730000	USD
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CY2021Q4	bkh	Commercial Paper Maximum Borrowing Capacity CommercialPaperMaximumBorrowingCapacity	750000000	USD
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CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	26878000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3769000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3272000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3242000	USD
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CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
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CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
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CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-27346000	USD
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CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	9655000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	5373000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	12095000	USD
CY2021	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	28000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid	1647000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	3294000	USD
CY2020	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	14000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid	1100000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	2199000	USD
CY2019	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	44000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid	2860000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	5720000	USD
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CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	574000	USD
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CY2020	bkh	Effective Income Tax Reconciliation Tcja Related Customer Billing Credits To Its Customers Percent EffectiveIncomeTaxReconciliationTCJARelatedCustomerBillingCreditsToItsCustomersPercent	0
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CY2021	dei	Auditor Firm AuditorFirmId	34

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$BKH
BLACK HILLS CORP /SD/ Stock $bkh

2021 Q4 Form 10-K Financial Statement

#000113046422000004 Filed on February 15, 2022

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$BKH BLACK HILLS CORP /SD/ Stock $bkh

2021 Q4 Form 10-K Financial Statement

#000113046422000004 Filed on February 15, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BKH
BLACK HILLS CORP /SD/ Stock $bkh