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Fair Value of Financial Instruments - Summary of Fair Value Information and Derivative Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 03, 2015
Financial Assets  
Assets Fair Value Disclosure $ 4,676us-gaap_AssetsFairValueDisclosure
Financial Liabilities  
Liabilities Fair Value Disclosure 421us-gaap_LiabilitiesFairValueDisclosure
Directors' deferred compensation investments [Member]  
Financial Assets  
Assets Fair Value Disclosure 401us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
Financial Liabilities  
Liabilities Fair Value Disclosure 401us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
Foreign currency forward contracts [Member]  
Financial Assets  
Assets Fair Value Disclosure 4,275us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
Financial Liabilities  
Liabilities Fair Value Disclosure 20us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
Fair Value, Inputs, Level 1 [Member]  
Financial Assets  
Assets Fair Value Disclosure 401us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Financial Liabilities  
Liabilities Fair Value Disclosure 401us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 1 [Member] | Directors' deferred compensation investments [Member]  
Financial Assets  
Assets Fair Value Disclosure 401us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Financial Liabilities  
Liabilities Fair Value Disclosure 401us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 1 [Member] | Foreign currency forward contracts [Member]  
Financial Assets  
Assets Fair Value Disclosure 0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Financial Liabilities  
Liabilities Fair Value Disclosure 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 2 [Member]  
Financial Assets  
Assets Fair Value Disclosure 4,275us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Financial Liabilities  
Liabilities Fair Value Disclosure 20us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | Directors' deferred compensation investments [Member]  
Financial Assets  
Assets Fair Value Disclosure 0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Financial Liabilities  
Liabilities Fair Value Disclosure 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | Foreign currency forward contracts [Member]  
Financial Assets  
Assets Fair Value Disclosure 4,275us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Financial Liabilities  
Liabilities Fair Value Disclosure 20us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 3 [Member]  
Financial Assets  
Assets Fair Value Disclosure 0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Financial Liabilities  
Liabilities Fair Value Disclosure 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | Directors' deferred compensation investments [Member]  
Financial Assets  
Assets Fair Value Disclosure 0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Financial Liabilities  
Liabilities Fair Value Disclosure 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_DirectorsDeferredCompensationInvestmentsAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | Foreign currency forward contracts [Member]  
Financial Assets  
Assets Fair Value Disclosure 0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Financial Liabilities  
Liabilities Fair Value Disclosure $ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= mtrn_ForeignCurrencyForwardContractMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member