XML 64 R40.htm IDEA: XBRL DOCUMENT v3.20.4

ASSET RETIREMENT OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2020

ASSET RETIREMENT OBLIGATIONS

Schedule of reconciliation of asset retirement obligations

​

​	​	​	​	​	​
​	December 31, 2020			December 31, 2019
Asset retirement obligation liability, beginning balance	$	32,201	​	$	29,402
Settlements		(267)	​		(513)
Accretion of liability		1,901	​		1,680
Adjustment reflecting updated estimates		(54)	​		1,012
Foreign exchange revaluation	​	219	​	​	620
Asset retirement obligation liability, ending balance	$	34,000	​	$	32,201
Less current portion	​	3,232	​	​	2,610
Long-term portion	$	30,768	​	$	29,591

Schedule of reclamation expense

​

​	​	​	​	​	​	​	​	​
​	Year ended December 31,
​	2020		​	2019		​	2018
Reclamation adjustment reflecting updated estimates	$	(113)	​	$	1,851	​	$	2,259
Reclamation accretion	​	1,901	​	​	1,680	​	​	1,205
Total	$	1,788	​	​	3,531	​	$	3,464

X

- Definition

Tabular disclosure for reclamation expense.

+ References

No definition available.

+ Details

Name:	mux_ReclamationExpenseTableTextBlock
Namespace Prefix:	mux_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EnvironmentalRemediationObligationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859

+ Details

Name:	us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration