XML 109 R85.htm IDEA: XBRL DOCUMENT
v3.20.4

COMMITMENTS AND CONTINGENCIES - Lease Obligations and Purchase Commitments (Details) $ in Thousands | Dec. 31, 2020 USD ($)
--- | ---
Mining and surface rights |
2021 | $ 2,233
2022 | 492
2023 | 488
2024 | 470
Thereafter | 443
Total | 4,126
Reclamation costs |
2021 | 2,819
2022 | 5,363
2023 | 5,510
2024 | 564
Thereafter | 27,428
Total | 41,684
Long-term debt |
2021 | 4,875
2022 | 14,712
2023 | 42,139
Total | 61,726
Lease obligations |
2021 | 2,695
2022 | 2,416
2023 | 508
2024 | 180
Total | 5,799
Total |
2021 | 12,622
2022 | 22,983
2023 | 48,645
2024 | 1,214
Thereafter | 27,871
Total | $ 113,335

X
- References No definition available. + Details
Name: | mux_LeaseLiabilitiesPaymentsDueAbstract
Namespace Prefix: | mux_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of lessee's undiscounted obligation for lease payments.. + References No definition available. + Details
Name: | mux_LeaseLiabilityPaymentsDue
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in next fiscal year. + References No definition available. + Details
Name: | mux_LeaseLiabilityPaymentsDueNextTwelveMonths
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments, due in fourth fiscal year following latest fiscal year. + References No definition available. + Details
Name: | mux_LeaseLiabilityPaymentsDueYearFour
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments , due in third fiscal year following latest fiscal year. + References No definition available. + Details
Name: | mux_LeaseLiabilityPaymentsDueYearThree
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments , due in second fiscal year following latest fiscal year. + References No definition available. + Details
Name: | mux_LeaseLiabilityPaymentsDueYearTwo
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long term debt obligations. + References No definition available. + Details
Name: | mux_LongTermDebtObligations
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition n/a. + References No definition available. + Details
Name: | mux_LongTermDebtObligationsAbstract
Namespace Prefix: | mux_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of long term debt obligations in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_LongTermDebtObligationsInNextTwelveMonths
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of long term debt obligations in the second fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_LongTermDebtObligationsInSecondYear
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of long term debt obligations in the third fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_LongTermDebtObligationsInThirdYear
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition n/a + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsAbstract
Namespace Prefix: | mux_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of required minimum rental payments for leases for mining and surface rights having an initial or remaining non-cancelable letter-terms in excess of one year. + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDue
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases for mining and surface rights having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInFourYears
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases for mining and surface rights having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInNextTwelveMonths
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases for mining and surface rights having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInThreeYears
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases for mining and surface rights having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInTwoYears
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases for mining and surface rights having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | mux_OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueThereafter
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs. + References No definition available. + Details
Name: | mux_ReclamationCosts
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs maturing in the fourth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_ReclamationCostsDueInFourthYear
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_ReclamationCostsDueInNextTwelveMonths
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs maturing in the second fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_ReclamationCostsDueInSecondYear
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs maturing in the third fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_ReclamationCostsDueInThirdYear
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs maturing after the fifth fiscal year. + References No definition available. + Details
Name: | mux_ReclamationCostsDueThereafter
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of reclamation costs maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | mux_ReclamationCostsFiscalYearMaturityAbstract
Namespace Prefix: | mux_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueAfterFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInFourthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInSecondYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInThirdYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ContractualObligationFiscalYearMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration