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Cash and Cash Equivalents (Details) $ in Thousands | Sep. 30, 2025 USD ($)
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Cash and Cash Equivalents [Abstract] |
Gross cash pool position | $ 57,992
Less: cash pool borrowings | (55,619)
Net cash pool position | $ 2,373

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- Definition Cash Balance, Amount Offset Against Collateral + References No definition available. + Details
Name: | msa_CashBalanceAmountOffsetAgainstCollateral
Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Cash Balance, Collateral, Obligation to Return Cash + References No definition available. + Details
Name: | msa_CashBalanceCollateralObligationToReturnCash
Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash Balance Subject To Master Netting Arrangement + References No definition available. + Details
Name: | msa_CashBalanceSubjectToMasterNettingArrangement
Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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