Cash and Cash Equivalents (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Cash and Cash Equivalents [Abstract]
Gross cash pool position	$ 92,201
Less: cash pool borrowings	(87,696)
Net cash pool position	$ 4,505

Cash Balance, Collateral, Obligation to Return Cash

No definition available.

Name:	msa_CashBalanceCollateralObligationToReturnCash
Namespace Prefix:	msa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant