XML 109 R51.htm IDEA: XBRL DOCUMENT v2.4.1.9
Acquisitions (Details Textual) (USD $)
12 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mar. 30, 2012
Acquisitions (Textual) [Abstract]        
Payments to acquire business, net of cash acquired $ 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired $ 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired $ 3,894,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired  
Goodwill 86,725,000us-gaap_Goodwill 86,725,000us-gaap_Goodwill 88,753,000us-gaap_Goodwill  
Aerospace Metal Composites Limited [Member]        
Acquisitions (Textual) [Abstract]        
Payments to acquire business, net of cash acquired       3,300,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= mtrn_AerospaceMetalCompositesLimitedMember
Cash acquired from acquisition       1,500,000us-gaap_CashAcquiredFromAcquisition
/ us-gaap_BusinessAcquisitionAxis
= mtrn_AerospaceMetalCompositesLimitedMember
Goodwill       $ 1,900,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= mtrn_AerospaceMetalCompositesLimitedMember