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Facility Consolidation (Details) (Facility Closing [Member], USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2013
facility
building
operation
Dec. 31, 2012
facility
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
facility
Restructuring Cost and Reserve [Line Items]          
Number of facilities closed 1mtrn_NumberOfFacilitiesClosed 1mtrn_NumberOfFacilitiesClosed     2mtrn_NumberOfFacilitiesClosed
Number of operations consolidated 1mtrn_NumberofOperationsConsolidated        
Number of buildings prior to consolidation 4mtrn_NumberofBuildingsPriortoConsolidation        
Number of buildings included in consolidation 2mtrn_NumberofBuildingsIncludedInConsolidation        
Costs associated with consolidation program     $ 707,000us-gaap_RestructuringCharges $ 5,990,000us-gaap_RestructuringCharges  
Equipment write-offs       1,200,000us-gaap_AssetImpairmentCharges  
Additional expenditures in next fiscal year     200,000us-gaap_RestructuringAndRelatedCostExpectedCost1    
Cost of Sales [Member]
         
Restructuring Cost and Reserve [Line Items]          
Costs associated with consolidation program     433,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
1,812,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
 
Selling, General and Administrative Expenses [Member]
         
Restructuring Cost and Reserve [Line Items]          
Costs associated with consolidation program     104,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
2,805,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
 
Other Expense [Member]
         
Restructuring Cost and Reserve [Line Items]          
Costs associated with consolidation program     170,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherExpenseMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
1,373,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherExpenseMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
 
Employee Severance and Other Employee Costs [Member]          
Restructuring Cost and Reserve [Line Items]          
Costs associated with consolidation program     700,000us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= mtrn_EmployeeSeveranceandOtherEmployeeCostsMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
2,000,000us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= mtrn_EmployeeSeveranceandOtherEmployeeCostsMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember
 
Cash payments for restructuring     $ 2,500,000us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= mtrn_EmployeeSeveranceandOtherEmployeeCostsMember
/ us-gaap_RestructuringPlanAxis
= us-gaap_FacilityClosingMember