$HL
HECLA MINING CO/DE/ Stock $hl

$hl Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000143774922004164 Filed on February 23, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$185.1M	$807.5M	$188.9M
YoY Change	-2.02%	16.71%	-16.01%
Cost Of Revenue	$131.8M	$589.7M	$142.1M
YoY Change	-7.22%	11.1%	-28.81%
Gross Profit	$53.24M	$217.8M	$46.80M
YoY Change	13.76%	35.2%	84.98%
Gross Profit Margin	28.77%	26.97%	24.78%
Selling, General & Admin	$6.585M	$34.57M	$7.900M
YoY Change	-16.65%	-2.89%	-12.22%
% of Gross Profit	12.37%	15.87%	16.88%
Research & Development	$19.91M	$47.90M	$8.500M
YoY Change	134.21%		193.1%
% of Gross Profit	37.39%	21.99%	18.16%
Depreciation & Amortization	$32.85M	$172.7M	$37.10M
YoY Change	-11.45%	11.38%	-39.67%
% of Gross Profit	61.7%	79.27%	79.27%
Operating Expenses	$25.34M	$134.4M	$20.70M
YoY Change	22.39%	42.77%	43.75%
Operating Profit	$27.91M	$83.42M	$26.10M
YoY Change	6.92%	24.55%	139.45%
Interest Expense	-$35.21M	$41.95M	-$25.60M
YoY Change	37.54%	-15.38%	29.95%
% of Operating Profit	-126.17%	50.28%	-98.08%
Other Income/Expense, Net	-$382.0K	-$77.89M	-$100.0K
YoY Change	282.0%	14.15%	-90.0%
Pretax Income	-$13.77M	$5.526M	-$300.0K
YoY Change	4490.0%	-539.27%	-97.52%
Income Tax	-$25.65M	-$29.57M	-$1.100M
% Of Pretax Income		-535.09%
Net Earnings	$11.88M	$35.10M	$800.0K
YoY Change	1384.38%	-471.1%	-110.0%
Net Earnings / Revenue	6.42%	4.35%	0.42%
Basic Earnings Per Share		$0.06
Diluted Earnings Per Share	$21.85K	$0.06	$1.507K
COMMON SHARES
Basic Shares Outstanding	538.1M	536.2M	531.0M
Diluted Shares Outstanding		542.2M

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$210.0M	$210.0M	$129.8M
YoY Change	61.8%	61.8%	107.68%
Cash & Equivalents	$210.0M	$210.0M	$129.8M
Short-Term Investments
Other Short-Term Assets	$16.56M	$19.27M	$19.11M
YoY Change	-13.38%	0.87%	58.78%
Inventory	$67.77M	$67.77M	$57.57M
Prepaid Expenses
Receivables	$36.44M	$36.44M	$27.90M
Other Receivables	$8.149M	$8.149M	$11.30M
Total Short-Term Assets	$341.6M	$341.6M	$284.3M
YoY Change	20.16%	20.0%	58.98%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.311B	$2.323B	$2.378B
YoY Change	-2.83%	-1.38%	-2.83%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$10.84M	$10.84M	$15.10M
YoY Change	-28.19%	-28.19%	143.55%
Other Assets	$3.974M	$53.09M	$8.083M
YoY Change	-50.84%	342.43%	10.18%
Total Long-Term Assets	$2.387B	$2.387B	$2.416B
YoY Change	-1.19%	0.18%	-2.66%
TOTAL ASSETS
Total Short-Term Assets	$341.6M	$341.6M	$284.3M
Total Long-Term Assets	$2.387B	$2.387B	$2.416B
Total Assets	$2.729B	$2.729B	$2.700B
YoY Change	1.06%	2.29%	1.48%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$68.10M	$68.10M	$68.50M
YoY Change	-0.58%	-0.58%	18.72%
Accrued Expenses	$54.91M	$54.91M	$54.60M
YoY Change	0.57%	0.57%	27.27%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$5.612M	$5.612M	$6.500M
YoY Change	-13.66%	-13.66%	20.37%
Total Short-Term Liabilities	$160.4M	$160.4M	$147.2M
YoY Change	8.95%	7.06%	25.85%
LONG-TERM LIABILITIES
Long-Term Debt	$515.9M	$515.9M	$516.5M
YoY Change	-0.12%	-0.12%	2.33%
Other Long-Term Liabilities	$9.611M	$142.1M	$4.346M
YoY Change	121.15%	-14.73%	-36.61%
Total Long-Term Liabilities	$9.611M	$657.9M	$4.346M
YoY Change	121.15%	-3.68%	-99.15%
TOTAL LIABILITIES
Total Short-Term Liabilities	$160.4M	$160.4M	$147.2M
Total Long-Term Liabilities	$9.611M	$657.9M	$4.346M
Total Liabilities	$968.0M	$968.0M	$986.4M
YoY Change	-1.87%	0.27%	2.3%
SHAREHOLDERS EQUITY
Retained Earnings	-$353.7M		-$368.1M
YoY Change	-3.92%		5.4%
Common Stock	$136.4M		$134.6M
YoY Change	1.31%		1.77%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$28.02M		$23.50M
YoY Change	19.26%		2.3%
Treasury Stock Shares	$7.395M		$6.821M
Shareholders Equity	$1.761B	$1.761B	$1.714B
YoY Change
Total Liabilities & Shareholders Equity	$2.729B	$2.729B	$2.700B
YoY Change	1.06%	2.29%	1.48%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$11.88M	$35.10M	$800.0K
YoY Change	1384.38%	-471.1%	-110.0%
Depreciation, Depletion And Amortization	$32.85M	$172.7M	$37.10M
YoY Change	-11.45%	11.38%	-39.67%
Cash From Operating Activities	$53.35M	$220.3M	$64.90M
YoY Change	-17.79%	21.87%	13.26%
INVESTING ACTIVITIES
Capital Expenditures	-$28.84M	$109.0M	-$36.60M
YoY Change	-21.21%	19.76%	51.87%
Acquisitions
YoY Change
Other Investing Activities	-$154.0K	$2.019M	-$500.0K
YoY Change	-69.2%	-206.26%	-600.0%
Cash From Investing Activities	-$28.99M	-$107.0M	-$37.20M
YoY Change	-22.06%	15.21%	55.0%
FINANCING ACTIVITIES
Cash Dividend Paid		$20.67M
YoY Change		125.87%
Common Stock Issuance & Retirement, Net		$4.525M
YoY Change		64.85%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-5.198M	-$32.60M	2.600M
YoY Change	-299.92%	68.21%	-159.09%
NET CHANGE
Cash From Operating Activities	53.35M	$220.3M	64.90M
Cash From Investing Activities	-28.99M	-$107.0M	-37.20M
Cash From Financing Activities	-5.198M	-$32.60M	2.600M
Net Change In Cash	19.17M	$80.18M	30.30M
YoY Change	-36.75%	18.95%	4.84%
FREE CASH FLOW
Cash From Operating Activities	$53.35M	$220.3M	$64.90M
Capital Expenditures	-$28.84M	$109.0M	-$36.60M
Free Cash Flow	$82.19M	$111.3M	$101.5M
YoY Change	-19.02%	24.02%	24.69%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Auditor Location AuditorLocation	Spokane, Washington
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.02
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.19
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
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CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.25
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.25
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	750000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	750000000
CY2021Q4	hl	Common Stock Shares Issued Less Treasury Shares CommonStockSharesIssuedLessTreasuryShares	545534760
CY2020Q4	hl	Common Stock Shares Issued Less Treasury Shares CommonStockSharesIssuedLessTreasuryShares	538487415
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7395295
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	6821044
CY2019	hl	Stock Issued During Period Shares Directors StockIssuedDuringPeriodSharesDirectors	253000
CY2019	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	21410000
CY2019	hl	Stock Issued During Period Shares401k Match StockIssuedDuringPeriodShares401kMatch	1882000
CY2019	hl	Stock Issued During Period Shares Prepayment Of Debt StockIssuedDuringPeriodSharesPrepaymentOfDebt	10655000
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.01
CY2019	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	2.63
CY2019	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	3597000
CY2019	us-gaap	Stock Issued During Period Shares Employee Benefit Plan StockIssuedDuringPeriodSharesEmployeeBenefitPlan	2384000
CY2019	hl	Restricted Stock Unit Distributions Shares RestrictedStockUnitDistributionsShares	1164000
CY2020	hl	Stock Issued During Period Shares Directors StockIssuedDuringPeriodSharesDirectors	391000
CY2020	hl	Stock Issued During Period Shares401k Match StockIssuedDuringPeriodShares401kMatch	1584000
CY2020	hl	Restricted Stock Unit Distributions Shares RestrictedStockUnitDistributionsShares	1702000
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.01625
CY2020	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	2.63
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	691873000	USD
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.19
CY2020	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	2800000
CY2020	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	650000
CY2020	us-gaap	Stock Issued During Period Shares Employee Benefit Plan StockIssuedDuringPeriodSharesEmployeeBenefitPlan	2869000
CY2021	hl	Stock Issued During Period Shares Directors StockIssuedDuringPeriodSharesDirectors	207000
CY2021	hl	Stock Issued During Period Shares401k Match StockIssuedDuringPeriodShares401kMatch	685000
CY2021	hl	Restricted Stock Unit Distributions Shares RestrictedStockUnitDistributionsShares	1653000
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.0375
CY2021	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	2.63
CY2021	us-gaap	Stock Issued During Period Shares Employee Benefit Plan StockIssuedDuringPeriodSharesEmployeeBenefitPlan	4500000
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1100000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.02
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CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	pure
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0500	pure
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0500	pure
CY2021	hl	Defined Benefit Plan Assumed Long Term Rate Basis Spread DefinedBenefitPlanAssumedLongTermRateBasisSpread	0.01	pure
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.02
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.19
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2021	hl	Forecasted Cad Denominated Operating Costs To Be Hedged Term ForecastedCADDenominatedOperatingCostsToBeHedgedTerm	P5Y
CY2021Q4	hl	Percent Of Shareholders Consent Needed To Create Or Issue Stock Ranking Senior To Series B Preferred Stock PercentOfShareholdersConsentNeededToCreateOrIssueStockRankingSeniorToSeriesBPreferredStock	0.6667	pure
CY2021	hl	Share Based Compensation Arrangement By Share Based Payment Award Measurement Period Used To Value Performance Based Awards ShareBasedCompensationArrangementByShareBasedPaymentAwardMeasurementPeriodUsedToValuePerformanceBasedAwards	P3Y
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	807473000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	673266000	USD
CY2021	hl	Cost Of Goods Sold Before Depreciation Depletion And Amortization CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization	417879000	USD
CY2020	hl	Cost Of Goods Sold Before Depreciation Depletion And Amortization CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization	382663000	USD
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CY2021	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	171793000	USD
CY2020	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	148110000	USD
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CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	589672000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	530773000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	639436000	USD
CY2021	us-gaap	Gross Profit GrossProfit	217801000	USD
CY2020	us-gaap	Gross Profit GrossProfit	161100000	USD
CY2019	us-gaap	Gross Profit GrossProfit	33830000	USD
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	34570000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	35561000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	35832000	USD
CY2021	hl	Exploration And Predevelopment Expense ExplorationAndPredevelopmentExpense	47901000	USD
CY2020	hl	Exploration And Predevelopment Expense ExplorationAndPredevelopmentExpense	18295000	USD
CY2019	hl	Exploration And Predevelopment Expense ExplorationAndPredevelopmentExpense	19069000	USD
CY2021	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	14571000	USD
CY2020	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	3929000	USD
CY2019	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	4690000	USD
CY2021	hl	Employee Labor Strike Related Costs EmployeeLaborStrikeRelatedCosts	23012000	USD
CY2020	hl	Employee Labor Strike Related Costs EmployeeLaborStrikeRelatedCosts	24911000	USD
CY2019	hl	Employee Labor Strike Related Costs EmployeeLaborStrikeRelatedCosts	12051000	USD
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-87000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-572000	USD
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CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	4223000	USD
CY2021	us-gaap	Operating Expenses OperatingExpenses	134381000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	94122000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	80508000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	83420000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	66978000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-46678000	USD
CY2021	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-35792000	USD
CY2020	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-11806000	USD
CY2019	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-5437000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	417000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-4605000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-8236000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-574000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2256000	USD
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CY2021	us-gaap	Interest Expense InterestExpense	41945000	USD
CY2020	us-gaap	Interest Expense InterestExpense	49569000	USD
CY2019	us-gaap	Interest Expense InterestExpense	48447000	USD
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-77894000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-68236000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-66549000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5526000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1258000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-113227000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-29569000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8199000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18318000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35095000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-94909000	USD
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	552000	USD
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	552000	USD
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	552000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	34543000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-10009000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-95461000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35095000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
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CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	39528000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-5036000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-89750000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	536192000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	527329000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	490449000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	542176000
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CY2021	us-gaap	Net Income Loss NetIncomeLoss	35095000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-94909000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	172651000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	155006000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	196408000	USD
CY2021	hl	Fair Value Adjustments Net FairValueAdjustmentsNet	-15040000	USD
CY2020	hl	Fair Value Adjustments Net FairValueAdjustmentsNet	4690000	USD
CY2019	hl	Fair Value Adjustments Net FairValueAdjustmentsNet	-7079000	USD
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	6524000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	0	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	1399000	USD
CY2021	hl	Paidinkind Prepayment Of Debt Fee PaidinkindPrepaymentOfDebtFee	0	USD
CY2019	hl	Paidinkind Prepayment Of Debt Fee PaidinkindPrepaymentOfDebtFee	2855000	USD
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-87000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-572000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-4643000	USD
CY2021	us-gaap	Environmental Expense And Liabilities EnvironmentalExpenseAndLiabilities	11514000	USD
CY2020	us-gaap	Environmental Expense And Liabilities EnvironmentalExpenseAndLiabilities	6189000	USD
CY2019	us-gaap	Environmental Expense And Liabilities EnvironmentalExpenseAndLiabilities	6914000	USD
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	48049000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	3818000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	29968000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	6082000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	6458000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	5668000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1895000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3666000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2637000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	79000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-2680000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-8025000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-681000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1794000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-42000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	5405000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1080000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	10939000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-16919000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	13208000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-16146000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1678000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2381000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-15618000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-795000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	19379000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-24355000	USD
CY2021	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	1270000	USD
CY2020	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	14445000	USD
CY2019	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	9226000	USD
CY2021	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	6457000	USD
CY2020	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	3561000	USD
CY2019	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	-3155000	USD
CY2021	hl	Increase Decrease In Accrued Reclamation And Closure Costs And Other Non Current Liabilities IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities	-2128000	USD
CY2020	hl	Increase Decrease In Accrued Reclamation And Closure Costs And Other Non Current Liabilities IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities	3085000	USD
CY2019	hl	Increase Decrease In Accrued Reclamation And Closure Costs And Other Non Current Liabilities IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities	-7532000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	220337000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	180793000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	120866000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	109048000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	91016000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	121421000	USD
CY2021	hl	Payments For Carbon Credits PaymentsForCarbonCredits	869000	USD
CY2020	hl	Payments For Carbon Credits PaymentsForCarbonCredits	-0	USD
CY2019	hl	Payments For Carbon Credits PaymentsForCarbonCredits	-0	USD
CY2021	hl	Proceeds From Sale Of Investments ProceedsFromSaleOfInvestments	1811000	USD
CY2020	hl	Proceeds From Sale Of Investments ProceedsFromSaleOfInvestments	0	USD
CY2019	hl	Proceeds From Sale Of Investments ProceedsFromSaleOfInvestments	1760000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1077000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	331000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	183000	USD
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	-0	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2216000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	389000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-107029000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-92901000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-119867000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	49019000	USD
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	20672000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	9152000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	5466000	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	116000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1356000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	976000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4525000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2745000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2231000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	716327000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	279500000	USD
CY2021	us-gaap	Repayments Of Debt RepaymentsOfDebt	-0	USD
CY2020	us-gaap	Repayments Of Debt RepaymentsOfDebt	716500000	USD
CY2019	us-gaap	Repayments Of Debt RepaymentsOfDebt	279500000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7285000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	5953000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7157000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32598000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	22365000	USD
CY2019	hl	Common Stock Contributed To Pension Plans CommonStockContributedToPensionPlans	3600000	USD
CY2021	hl	Common Stock Issued For401 K Match CommonStockIssuedFor401KMatch	4339000	USD
CY2020	hl	Common Stock Issued For401 K Match CommonStockIssuedFor401KMatch	4624000	USD
CY2019	hl	Common Stock Issued For401 K Match CommonStockIssuedFor401KMatch	3862000	USD
CY2021	us-gaap	Restricted Stock Expense RestrictedStockExpense	0	USD
CY2020	us-gaap	Restricted Stock Expense RestrictedStockExpense	5096000	USD
CY2019	us-gaap	Restricted Stock Expense RestrictedStockExpense	8274000	USD
CY2021	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-19379000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	33189000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-530000	USD
CY2021	hl	Common Stock Contributed To Pension Plans CommonStockContributedToPensionPlans	22250000	USD
CY2020	hl	Common Stock Contributed To Pension Plans CommonStockContributedToPensionPlans	16032000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-1107000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	875000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	80180000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	67406000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	35063000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	130883000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	63477000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	28414000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	211063000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	130883000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	63477000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	37565000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	34853000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	42972000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-12105000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7913000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-3385000	USD
CY2021	hl	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued Value NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssuedValue	0	USD
CY2020	hl	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued Value NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssuedValue	0	USD
CY2019	hl	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued Value NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssuedValue	-325000	USD
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4870000	USD
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	9113000	USD
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	6506000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4874000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	33457000	USD
CY2021	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	3626000	USD
CY2020	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	0	USD
CY2019	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	0	USD
CY2021	hl	Marketable Equity Securities Received For Sale Of Mineral Interest MarketableEquitySecuritiesReceivedForSaleOfMineralInterest	0	USD
CY2020	hl	Marketable Equity Securities Received For Sale Of Mineral Interest MarketableEquitySecuritiesReceivedForSaleOfMineralInterest	0	USD
CY2019	hl	Marketable Equity Securities Received For Sale Of Mineral Interest MarketableEquitySecuritiesReceivedForSaleOfMineralInterest	2257000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	210010000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	129830000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	36437000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	27864000	USD
CY2021Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable		USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1584000	USD
CY2021Q4	us-gaap	Other Receivables OtherReceivables	8149000	USD
CY2020Q4	us-gaap	Other Receivables OtherReceivables	9745000	USD
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	25906000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	57567000	USD
CY2021Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	41859000	USD
CY2020Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	38608000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	19266000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	19114000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	341627000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	284312000	USD
CY2021Q4	us-gaap	Long Term Investments LongTermInvestments	10844000	USD
CY2020Q4	us-gaap	Long Term Investments LongTermInvestments	15148000	USD
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1053000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1053000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2310810000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2378074000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12435000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10628000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	45562000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2912000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6477000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	8083000	USD
CY2021Q4	us-gaap	Assets Assets	2728808000	USD
CY2020Q4	us-gaap	Assets Assets	2700210000	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	68100000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	68516000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	28714000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	31807000	USD
CY2021Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	12306000	USD
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	5774000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	5612000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	6491000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2486000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3008000	USD
CY2021Q4	us-gaap	Accrued Reclamation Costs Current AccruedReclamationCostsCurrent	9259000	USD
CY2020Q4	us-gaap	Accrued Reclamation Costs Current AccruedReclamationCostsCurrent	5582000	USD
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	14454000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	14157000	USD
CY2021Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	19353000	USD
CY2020Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	11737000	USD
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	99000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	138000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	160383000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	147210000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	7776000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	9274000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9950000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	7634000	USD
CY2021Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	103972000	USD
CY2020Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	110466000	USD
CY2021Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	508095000	USD
CY2020Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	507242000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	149706000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	156091000	USD
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	4673000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	44144000	USD
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	18528000	USD
CY2020Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	18000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4938000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4346000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	968021000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	986425000	USD
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	136391000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	134629000	USD
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2034485000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2003576000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-353651000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-368074000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-28456000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-32889000	USD
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	28021000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	23496000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1760787000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1713785000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2728808000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2700210000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1690426000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-94909000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	325000	USD
CY2019	hl	Stock Issued During Period Value Directors StockIssuedDuringPeriodValueDirectors	455000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	49019000	USD
CY2019	hl	Stock Issued During Period Value401k Match StockIssuedDuringPeriodValue401kMatch	3862000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	5213000	USD
CY2019	hl	Stock Issued During Period Value Prepayment Of Debt StockIssuedDuringPeriodValuePrepaymentOfDebt	33457000	USD
CY2019	us-gaap	Dividends Dividends	5466000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	6679000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	3600000	USD
CY2019	hl	Restricted Stock Unit Distributions RestrictedStockUnitDistributions	-636000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5159000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1696534000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
CY2020	hl	Stock Issued During Period Value Directors StockIssuedDuringPeriodValueDirectors	1486000	USD
CY2020	hl	Stock Issued During Period Value401k Match StockIssuedDuringPeriodValue401kMatch	4624000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	4975000	USD
CY2020	hl	Restricted Stock Unit Distributions RestrictedStockUnitDistributions	-1479000	USD
CY2020	us-gaap	Dividends Dividends	9151000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3830000	USD
CY2020	us-gaap	Treasury Stock Reissued At Lower Than Repurchase Price TreasuryStockReissuedAtLowerThanRepurchasePrice	-1970000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	16032000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4421000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1713785000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35095000	USD
CY2021	hl	Stock Issued During Period Value Directors StockIssuedDuringPeriodValueDirectors	1844000	USD
CY2021	hl	Stock Issued During Period Value401k Match StockIssuedDuringPeriodValue401kMatch	4339000	USD
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	4238000	USD
CY2021	hl	Restricted Stock Unit Distributions RestrictedStockUnitDistributions	-4525000	USD
CY2021	us-gaap	Dividends Dividends	20672000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	22250000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4433000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1760787000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"/><p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"/> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt;text-indent:27pt;"><i>B.</i> <i> Assumptions and Use of Estimates</i> — Preparing financial statements requires management to make estimates and assumptions that affect the reported amounts and related disclosure of assets, liabilities, revenue and expenses at the date of the consolidated financial statements and reporting periods. We consider our most critical accounting estimates to be future metals prices; obligations for environmental, reclamation and closure matters and mineral reserves and resources. Other significant areas requiring the use of management assumptions and estimates relate to reserves for contingencies and litigation; asset impairments, including long-lived assets and investments; valuation of deferred tax assets; and post-employment, post-retirement and other employee benefit assets and liabilities. We have based our estimates on historical experience and various other assumptions that we believe to be reasonable. Accordingly, actual results <em style="font: inherit;"> may </em>differ materially from these estimates under different assumptions or conditions.</p>
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1100000	USD
CY2021Q4	hl	Capitalized Drilling Costs CapitalizedDrillingCosts	5200000	USD
CY2020Q4	hl	Capitalized Drilling Costs CapitalizedDrillingCosts	4400000	USD
CY2019Q4	hl	Capitalized Drilling Costs CapitalizedDrillingCosts	14400000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	400000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-4600000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-8200000	USD
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<i>T. Reclassifications </i>—<i> </i>Certain amounts in prior years have been reclassified to conform with the <em style="font: inherit;">2021</em> presentation.
CY2020Q4	us-gaap	Inventory Net InventoryNet	57567000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	284312000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2378074000	USD
CY2020Q4	us-gaap	Assets Assets	2700210000	USD
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	5774000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	147210000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	156091000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	986425000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-368074000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1713785000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2700210000	USD
CY2020	hl	Cost Of Goods Sold Before Depreciation Depletion And Amortization CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization	382663000	USD
CY2020	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	148110000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	530773000	USD
CY2020	us-gaap	Gross Profit GrossProfit	161100000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	66978000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1258000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8199000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-10009000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-5036000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	155006000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-3818000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	180793000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	30078000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	178838000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2447450000	USD
CY2019Q4	us-gaap	Assets Assets	2660774000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	157637000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	964240000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-349220000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1696534000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2660774000	USD
CY2019	hl	Cost Of Goods Sold Before Depreciation Depletion And Amortization CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization	447985000	USD
CY2019	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	191451000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	639436000	USD
CY2019	us-gaap	Gross Profit GrossProfit	33830000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-46678000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-113227000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18318000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-94909000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-95461000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-89750000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-94909000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	196408000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-29968000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	120866000	USD
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	807473000	USD
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	691873000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	673266000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	83420000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	66978000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-46678000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	109048000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	91016000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	121421000	USD
CY2021	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	171793000	USD
CY2020	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	148110000	USD
CY2019	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	191451000	USD
CY2021	hl	Other Significant Noncash Income Expense OtherSignificantNoncashIncomeExpense	-6305000	USD
CY2020	hl	Other Significant Noncash Income Expense OtherSignificantNoncashIncomeExpense	12851000	USD
CY2019	hl	Other Significant Noncash Income Expense OtherSignificantNoncashIncomeExpense	9294000	USD
CY2021Q4	us-gaap	Assets Assets	2728808000	USD
CY2020Q4	us-gaap	Assets Assets	2700210000	USD
CY2019Q4	us-gaap	Assets Assets	2660774000	USD
CY2019	hl	Sales Revenue Goods Excluding Gain Loss On Forward Contracts SalesRevenueGoodsExcludingGainLossOnForwardContracts	674549000	USD
CY2021	us-gaap	Derivative Loss On Derivative DerivativeLossOnDerivative	500000	USD
CY2020	us-gaap	Derivative Loss On Derivative DerivativeLossOnDerivative	16400000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2310810000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2378074000	USD
CY2021	hl	Smelter And Refining Charges SmelterAndRefiningCharges	48933000	USD
CY2020	hl	Smelter And Refining Charges SmelterAndRefiningCharges	68361000	USD
CY2019	hl	Smelter And Refining Charges SmelterAndRefiningCharges	33004000	USD
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	807473000	USD
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	691873000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	673266000	USD
CY2021	hl	Sales Revenue Goods Excluding Gain Loss On Forward Contracts SalesRevenueGoodsExcludingGainLossOnForwardContracts	808016000	USD
CY2020	hl	Sales Revenue Goods Excluding Gain Loss On Forward Contracts SalesRevenueGoodsExcludingGainLossOnForwardContracts	708253000	USD
CY2019	hl	Sales Revenue Goods Excluding Gain Loss On Forward Contracts SalesRevenueGoodsExcludingGainLossOnForwardContracts	674549000	USD
CY2021	hl	Sales Revenue Goods Excluding Gain Loss On Forward Contracts SalesRevenueGoodsExcludingGainLossOnForwardContracts	808016000	USD
CY2020	hl	Sales Revenue Goods Excluding Gain Loss On Forward Contracts SalesRevenueGoodsExcludingGainLossOnForwardContracts	708253000	USD
CY2019	us-gaap	Derivative Loss On Derivative DerivativeLossOnDerivative	1300000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	36400000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	27900000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Increase Decrease For Revision In Estimates AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates	-4522000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	3087000	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	108374000	USD
CY2020	hl	Accrual For Environmental Loss Contingencies Accretion AccrualForEnvironmentalLossContingenciesAccretion	5912000	USD
CY2020	us-gaap	Accrual For Environmental Loss Contingencies Increase Decrease For Revision In Estimates AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates	2543000	USD
CY2020	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	781000	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	116048000	USD
CY2021	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	4952000	USD
CY2021	hl	Accrual For Environmental Loss Contingencies Accretion AccrualForEnvironmentalLossContingenciesAccretion	6454000	USD
CY2021	us-gaap	Accrual For Environmental Loss Contingencies Increase Decrease For Revision In Estimates AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates	-8781000	USD
CY2021	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	5442000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	113231000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	113231000	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	116048000	USD
CY2021Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	9259000	USD
CY2020Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	5582000	USD
CY2021Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	103972000	USD
CY2020Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	110466000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	108389000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	472000	USD
CY2019	hl	Accrual For Environmental Loss Contingencies Accretion AccrualForEnvironmentalLossContingenciesAccretion	7122000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	113200000	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	116000000.0	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	100208000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	91831000	USD
CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-8781000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2543000	USD
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	6451000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	5912000	USD
CY2021	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	2845000	USD
CY2020	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	78000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	95033000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	100208000	USD
CY2021	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	7477000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	192954000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	172909000	USD
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	5820000	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	5334000	USD
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	4990000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	5618000	USD
CY2021	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	550000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	0	USD
CY2021	hl	Defined Benefit Plan Benefit Obligation Change In Mortality Rate DefinedBenefitPlanBenefitObligationChangeInMortalityRate	548000	USD
CY2020	hl	Defined Benefit Plan Benefit Obligation Change In Mortality Rate DefinedBenefitPlanBenefitObligationChangeInMortalityRate	-1521000	USD
CY2021	hl	Defined Benefit Plan Benefit Obligation Increase Decrease For Discount Rate Change DefinedBenefitPlanBenefitObligationIncreaseDecreaseForDiscountRateChange	-5865000	USD
CY2020	hl	Defined Benefit Plan Benefit Obligation Increase Decrease For Discount Rate Change DefinedBenefitPlanBenefitObligationIncreaseDecreaseForDiscountRateChange	17040000	USD
CY2021	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	4342000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	121000	USD
CY2021	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	7477000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	6547000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	195862000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	192954000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	148052000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	116067000	USD
CY2021	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	27049000	USD
CY2020	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	14801000	USD
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	22250000	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	23731000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	6547000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	189874000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	148052000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-5988000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-44902000	USD
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	1315000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	758000	USD
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	4673000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	44144000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	29966000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	53085000	USD
CY2021Q4	hl	Defined Benefit Plan Amounts Recognized In Balance Sheet Including Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAmountsRecognizedInBalanceSheetIncludingAccumulatedOtherComprehensiveIncomeBeforeTax	23978000	USD
CY2020Q4	hl	Defined Benefit Plan Amounts Recognized In Balance Sheet Including Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAmountsRecognizedInBalanceSheetIncludingAccumulatedOtherComprehensiveIncomeBeforeTax	8183000	USD
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0264	pure
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0332	pure
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0286	pure
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0264	pure
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0640	pure
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0645	pure
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0200	pure
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0200	pure
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	5820000	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	5334000	USD
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	4401000	USD
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	4990000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	5618000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	6482000	USD
CY2021	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	9252000	USD
CY2020	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	7489000	USD
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	5982000	USD
CY2021	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	394000	USD
CY2020	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	117000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	61000	USD
CY2021	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-4502000	USD
CY2020	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-4652000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-4389000	USD
CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	6454000	USD
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	8232000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	9351000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	189931000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	189873000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	148051000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	8816000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	8765000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	8944000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	9135000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	9212000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	45880000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	195862000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	192954000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	191597000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-28386000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	1580000	USD
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.55	pure
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.05	pure
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	500000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	10000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	10000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7073000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7246000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3065000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6316000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	8745000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	9427000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	13389000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	15991000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12492000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-43708000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-5096000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-13962000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	750000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2696000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-16848000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-42958000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7792000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-30810000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-29569000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8199000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18318000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5526000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1258000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-113227000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1161000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-264000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-23778000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-8076000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-1.46	pure
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-5327000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	4.23	pure
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-3030000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	0.03	pure
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-38058000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-6.89	pure
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-786000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.62	pure
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-686000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	pure
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5844000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	1.06	pure
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1164000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.93	pure
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-2648000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.02	pure
CY2021	hl	Effective Income Tax Reconciliation Foreign Currency Translation Of Monetary Assets And Liabilities Amount EffectiveIncomeTaxReconciliationForeignCurrencyTranslationOfMonetaryAssetsAndLiabilitiesAmount	3625000	USD
CY2021	hl	Income Tax Rate Reconciliation Foreign Currency Translation Percentage IncomeTaxRateReconciliationForeignCurrencyTranslationPercentage	0.66	pure
CY2020	hl	Effective Income Tax Reconciliation Foreign Currency Translation Of Monetary Assets And Liabilities Amount EffectiveIncomeTaxReconciliationForeignCurrencyTranslationOfMonetaryAssetsAndLiabilitiesAmount	4824000	USD
CY2020	hl	Income Tax Rate Reconciliation Foreign Currency Translation Percentage IncomeTaxRateReconciliationForeignCurrencyTranslationPercentage	-3.83	pure
CY2019	hl	Effective Income Tax Reconciliation Foreign Currency Translation Of Monetary Assets And Liabilities Amount EffectiveIncomeTaxReconciliationForeignCurrencyTranslationOfMonetaryAssetsAndLiabilitiesAmount	8629000	USD
CY2019	hl	Income Tax Rate Reconciliation Foreign Currency Translation Percentage IncomeTaxRateReconciliationForeignCurrencyTranslationPercentage	-0.08	pure
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2445000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.44	pure
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2362000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	1.88	pure
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3999000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.04	pure
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-1094000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.20	pure
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	458000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.36	pure
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1056000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.01	pure
CY2021	hl	Effective Income Tax Rate Reconciliation Mining And Other Taxes Amount EffectiveIncomeTaxRateReconciliationMiningAndOtherTaxesAmount	6990000	USD
CY2021	hl	Effective Income Tax Rate Reconciliation Mining And Other Taxes Percent EffectiveIncomeTaxRateReconciliationMiningAndOtherTaxesPercent	1.26	pure
CY2020	hl	Effective Income Tax Rate Reconciliation Mining And Other Taxes Amount EffectiveIncomeTaxRateReconciliationMiningAndOtherTaxesAmount	9245000	USD
CY2020	hl	Effective Income Tax Rate Reconciliation Mining And Other Taxes Percent EffectiveIncomeTaxRateReconciliationMiningAndOtherTaxesPercent	-7.35	pure
CY2019	hl	Effective Income Tax Rate Reconciliation Mining And Other Taxes Amount EffectiveIncomeTaxRateReconciliationMiningAndOtherTaxesAmount	4887000	USD
CY2019	hl	Effective Income Tax Rate Reconciliation Mining And Other Taxes Percent EffectiveIncomeTaxRateReconciliationMiningAndOtherTaxesPercent	-0.04	pure
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2484000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.45	pure
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1247000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.99	pure
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1251000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.01	pure
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-29569000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-5.35	pure
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8199000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-6.52	pure
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18318000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.16	pure
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	104100000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	153200000	USD
CY2021Q4	hl	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reclamation Costs DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReclamationCosts	31558000	USD
CY2020Q4	hl	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reclamation Costs DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReclamationCosts	32938000	USD
CY2021Q4	hl	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Exploration DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredExploration	17959000	USD
CY2020Q4	hl	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Exploration DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredExploration	11623000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	18152000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	13303000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	213637000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	198438000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	1824000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	12341000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Currency Losses DeferredTaxAssetsUnrealizedCurrencyLosses	19542000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Unrealized Currency Losses DeferredTaxAssetsUnrealizedCurrencyLosses	19808000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	2493000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	3358000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	29505000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	18385000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	334670000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	310194000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	39152000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	77210000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	295518000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	232984000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2751000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2551000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	396911000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	383612000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	399662000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	386163000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	104144000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	153179000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	77210000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	86634000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	94981000	USD
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	542176000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	527329000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	490449000
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2317007
CY2021	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	1557503
CY2021	hl	Incremental Common Shares Attributable To Dilutive Effect Of Deferred Shares IncrementalCommonSharesAttributableToDilutiveEffectOfDeferredShares	2166964
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2021	hl	Operating Loss Carryforwards Expiration Period OperatingLossCarryforwardsExpirationPeriod	P20Y
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35095000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-9457000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-94909000	USD
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	552000	USD
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	552000	USD
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	552000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	34543000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-10009000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-95461000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	536192000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	527329000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	490449000
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	5984000
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	13400000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	15800000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	5600000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	6500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	7800000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	9300000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	8900000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	7400000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	5900000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	600000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	600000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	700000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	14200000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	800000	USD
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.063	pure
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	6097000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	4422000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	3156000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	556000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	14231000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	843000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	13388000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.058	pure
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12400000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10600000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2500000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3000000.0	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10000000.0	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	7600000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12400000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10600000	USD
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	3900000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	7200000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	7500000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	15800000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y6M
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	3153000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	3011000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	1084000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	1058000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	1059000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	6418000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	15783000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3347000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12436000	USD
CY2021Q4	hl	Maximum Allocation Of Forecasted Cad Demonimated Operating Costs MaximumAllocationOfForecastedCADDemonimatedOperatingCosts	0.75	pure
CY2021	us-gaap	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet	4700000	USD
CY2021	us-gaap	Gain Loss On Components Excluded From Assessment Of Foreign Currency Cash Flow Hedge Effectiveness GainLossOnComponentsExcludedFromAssessmentOfForeignCurrencyCashFlowHedgeEffectiveness	0	USD
CY2021Q4	us-gaap	Price Risk Cash Flow Hedge Unrealized Gain Loss To Be Reclassified During Next12 Months PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months	-3400000	USD
CY2021	us-gaap	Fair Value Asset Liability Recurring Basis Still Held Unrealized Gain Loss FairValueAssetLiabilityRecurringBasisStillHeldUnrealizedGainLoss	-4295000	USD
CY2020	us-gaap	Fair Value Asset Liability Recurring Basis Still Held Unrealized Gain Loss FairValueAssetLiabilityRecurringBasisStillHeldUnrealizedGainLoss	10268000	USD
CY2019	us-gaap	Fair Value Asset Liability Recurring Basis Still Held Unrealized Gain Loss FairValueAssetLiabilityRecurringBasisStillHeldUnrealizedGainLoss	-2389000	USD
CY2021	hl	Fair Value Asset Liability Recurring Basis Still Held Total Adjustment Net FairValueAssetLiabilityRecurringBasisStillHeldTotalAdjustmentNet	-35792000	USD
CY2020	hl	Fair Value Asset Liability Recurring Basis Still Held Total Adjustment Net FairValueAssetLiabilityRecurringBasisStillHeldTotalAdjustmentNet	-11806000	USD
CY2019	hl	Fair Value Asset Liability Recurring Basis Still Held Total Adjustment Net FairValueAssetLiabilityRecurringBasisStillHeldTotalAdjustmentNet	-5437000	USD
CY2019Q4	hl	Average Realized Silver Price Minimum Dividend Threshold AverageRealizedSilverPriceMinimumDividendThreshold	30
CY2020Q3	hl	Average Realized Silver Price Minimum Dividend Threshold AverageRealizedSilverPriceMinimumDividendThreshold	25
CY2021Q3	hl	Average Realized Silver Price Per Ounce AverageRealizedSilverPricePerOunce	20
CY2020	hl	Average Realized Silver Price Per Ounce AverageRealizedSilverPricePerOunce	25
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	157816
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	3600000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2022352
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2310810000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2378074000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	109000000.0	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	78900000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	74000000.0	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	60600000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	51700000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3909019000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3824404000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1598209000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1446330000	USD

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$HL
HECLA MINING CO/DE/ Stock $hl

2021 Q4 Form 10-K Financial Statement

#000143774922004164 Filed on February 23, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HL HECLA MINING CO/DE/ Stock $hl

2021 Q4 Form 10-K Financial Statement

#000143774922004164 Filed on February 23, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HL
HECLA MINING CO/DE/ Stock $hl