CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Comprehensive Income [Abstract]
Consolidated net income	$ 76,269	$ 70,254	$ 69,886
Other comprehensive income, net of tax:
Foreign currency translation adjustments	1,479	(17,565)	(8,173)
Pension and postretirement plan adjustments	(7,730)	(25,630)	347
Sale of interest in business	0	(820)	0
Cash flow hedges:
Net derivative gains (losses) arising during the period	(204)	529	2,020
Reclassification adjustment	11	47	45
Comprehensive income	69,825	26,815	64,125
Comprehensive income attributable to non-controlling interest	(1,545)	(1,035)	(4,039)
Comprehensive income (loss) attributable to MTI	$ 68,280	$ 25,780	$ 60,086

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