Revenue Recognition - Contract Balances (Details) - USD ($) $ in Thousands	9 Months Ended
Oct. 02, 2026	Dec. 31, 2025
Capitalized Contract Cost [Line Items]
Unearned revenue	$ 2,300	$ 2,400
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:AccountsReceivableNetCurrent
Capitalized Contract Cost [Line Items]
Change in accounts receivable, trade	$ 47,795
Contract asset percent change	21.00%
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:DeferredRevenueCurrent
Capitalized Contract Cost [Line Items]
Change in unearned revenue	$ (718)
Contract liability percent change	(6.00%)
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:OtherAssetsNoncurrent
Capitalized Contract Cost [Line Items]
Change in unbilled receivables	$ 6,078
Contract asset percent change	13.00%
Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccountsReceivableNetCurrent
Capitalized Contract Cost [Line Items]
Accounts receivable, trade	$ 271,558	223,763
Location, Statement of Financial Position, Balance [Axis]: us-gaap:DeferredRevenueCurrent
Capitalized Contract Cost [Line Items]
Unearned revenue	11,967	12,685
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent
Capitalized Contract Cost [Line Items]
Unbilled receivables	$ 52,626	$ 46,548

Change In Unearned Revenue

No definition available.

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Balance Type:	credit
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- Definition

The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts.

+ References

No definition available.

+ Details

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- Definition

Contract With Customer Asset Net Current Change

+ References

No definition available.

+ Details

Name:	mtrn_ContractWithCustomerAssetNetCurrentChange
Namespace Prefix:	mtrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Contract with Customer Asset Percent Change

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Contract with Customer Liability Percent Change

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

+ Details

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Balance Type:	na
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- Definition

Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-3

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(26)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 912
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478345/912-310-45-2

+ Details

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- Details

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