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Summary of Significant Accounting Policies (Policies) | 6 Months Ended
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Jun. 30, 2022
Accounting Policies [Abstract] |
Risks and Uncertainties [Policy Text Block] | Please see Note 2 — Summary of Significant Accounting Policies contained in the 2021 10-K.
Use of Estimates, Policy [Policy Text Block] | Use of Estimates The Company's Consolidated Financial Statements have been prepared in accordance with United States Generally Accepted Accounting Principles (“U.S. GAAP”). The preparation of the Company's Consolidated Financial Statements requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to metal prices and mineral reserves that are the basis for future cash flow estimates utilized in impairment calculations and units-of production amortization calculations, environmental, reclamation and closure obligations, estimates of recoverable silver and gold in leach pad inventories, estimates of fair value for certain reporting units and asset impairments, valuation allowances for deferred tax assets, and the fair value and accounting treatment of financial instruments, equity securities, asset acquisitions, the allocation of fair value to assets and liabilities assumed in connection with business combinations, and derivative instruments. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results will differ from the amounts estimated in these financial statements.
Revenue Recognition, Policy | Revenue Recognition The Company’s gold stream agreement with a subsidiary of Franco-Nevada Corporation (“Franco-Nevada”) provided for a $22.0 million deposit paid by Franco-Nevada in exchange for the right and obligation, commencing in 2016, to purchase 50% of a portion of Palmarejo gold production at the lesser of $800 or market price per ounce. Because there is no minimum obligation associated with the deposit, it is not considered financing, and each shipment is considered to be a separate performance obligation. The streaming agreement represents a contract liability under ASC 606, which requires the Company to ratably recognize a portion of the deposit as revenue for each gold ounce delivered to Franco-Nevada. The remaining unamortized balance is included in Accrued liabilities and other and Other long-term liabilities on the Consolidated Balance Sheet. See Note 17 -- Commitments and Contingencies for additional detail. The following table presents a roll forward of the Franco-Nevada contract liability balance:
| Three Months Ended June 30, |  | Six Months Ended June 30,
In thousands | 2022 |  | 2021 |  | 2022 |  | 2021 |  |
Opening Balance | $ | 7,835 |  |  | $ | 9,030 |  |  | $ | 8,150 |  |  | $ | 9,376 |  |  |
Revenue Recognized | (93) |  |  | (255) |  |  | (408) |  |  | (601) |  |  |
Closing Balance | $ | 7,742 |  |  | $ | 8,775 |  |  | $ | 7,742 |  |  | $ | 8,775 |  |  |
In December 2021, the Company received a $15.0 million prepayment (the “December 2021 Prepayment”) for deliveries of gold concentrate from the Kensington mine pursuant to the Amended Sales Contract (as defined in Note 17). In March 2022, the Company exercised an option to receive a $10.0 million prepayment (the “March 2022 Prepayment). The Amended Sales Contract represents a contract liability under ASC 606, which requires the Company to recognize ratably a portion of the deposit as revenue for each gold ounce delivered to the customer. The remaining contract liability is included in Accrued liabilities and other on the Consolidated Balance Sheet. See Note 17 -- Commitments and Contingencies for additional detail. The following table presents a roll forward of the Amended Sales Contract liability balance:
| Three Months Ended June 30, |  | Six Months Ended June 30,
In thousands | 2022 |  | 2021 |  | 2022 |  | 2021 |  |
Opening Balance | $ | 25,155 |  |  | $ | 7,104 |  |  | $ | 15,016 |  |  | $ | 15,003 |  |  |
Additions | 311 |  |  | 14,900 |  | — |  | 10,450 |  |  | 15,001 |  |  |
Revenue Recognized | (454) |  |  | (7,000) |  |  | (454) |  |  | (15,000) |  |  |
Closing Balance | $ | 25,012 |  |  | $ | 15,004 |  |  | $ | 25,012 |  |  | $ | 15,004 |  |  |
Recent Accounting Standards | Recently Issued Accounting Standards In March 2022, the FASB issued ASU 2022-01, “Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method” which is intended to make amendments to the fair value hedge accounting previously issued in ASU 2017-12 “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities”. The new standard is effective for reporting periods beginning after December 15, 2022. The standard introduced the portfolio layer method allowing multiple hedged layers of a single closed portfolio when applying fair value hedge accounting. The Company plans to adopt the new derivatives and hedging standards effective January 1, 2023 and does not expect the new derivatives and hedging standard to have a material effect on our financial position, results of operations or cash flows.

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