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Total capital expenditures incurred, excluding non-cash items for additions acquired under capital leases and adjustments for asset retirement obligations, capitalized interest, and deferred taxes.

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No definition available.

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- Definition

Amount of accumulated interest costs capitalized as part of property, plant and equipment cost basis.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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- Definition

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 2)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Note 3 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Details)	0 Months Ended		12 Months Ended
	Jun. 02, 2013 USD ($)	Jun. 02, 2013 CAD	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Lucky Friday [Member] USD ($)	Dec. 31, 2014 Greens Creek [Member] USD ($)	Dec. 31, 2014 Casa Berardi [Member] USD ($)	Dec. 31, 2014 Aurizon Mines Ltd [Member] USD ($)	Dec. 31, 2014 Aurizon Mines Ltd [Member] CAD
Note 3 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Details) [Line Items]
Total Capital Expenditures			$ 122,500,000hl_TotalCapitalExpenditures			$ 49,400,000	$ 26,200,000	$ 46,600,000
Business Combination, Consideration Transferred	714,500,000	740,800,000	714,513,000						714,500,000	740,800,000
Accumulated Capitalized Interest Costs			11,800,000	6,500,000
Capital Leased Assets, Gross			50,700,000us-gaap_CapitalLeasedAssetsGross	41,200,000us-gaap_CapitalLeasedAssetsGross
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation			8,600,000	10,100,000
Operating Leases, Rent Expense			$ 3,500,000us-gaap_LeaseAndRentalExpense	$ 3,100,000us-gaap_LeaseAndRentalExpense	$ 3,100,000us-gaap_LeaseAndRentalExpense