XML 107 R89.htm IDEA: XBRL DOCUMENT
v3.22.4

Subsequent Event (Details) | 2 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 17, 2023 Segment ProductLine | Dec. 31, 2022 Segment
Subsequent Event [Abstract] |  |
Number of reportable segments |  | 3
Subsequent Event [Member] |  |
Subsequent Event [Abstract] |  |
Number of reportable segments | 2 |
Subsequent Event [Member] | Engineered Solutions [Member] |  |
Subsequent Event [Abstract] |  |
Number of product lines | ProductLine | 2 |

X
- Definition Number of product lines included in the segment. + References No definition available. + Details
Name: | mtx_NumberOfProductLines
Namespace Prefix: | mtx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtx_EngineeredSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |