CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Comprehensive Income [Abstract]
Consolidated net income	$ 17,739	$ 20,239	$ 37,343	$ 38,847
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(7,826)	(16,066)	(22,611)	(6,967)
Pension and postretirement plan adjustments	1,983	1,831	3,749	3,652
Cash flow hedges [Abstract]
Net derivative gains (losses) arising during the period	(72)	1,213	514	679
Comprehensive income	11,824	7,217	18,995	36,211
Comprehensive income attributable to non-controlling interest	211	132	(168)	(811)
Comprehensive income (loss) attributable to MTI	$ 12,035	$ 7,349	$ 18,827	$ 35,400