Earnings Per Share (EPS) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Basic EPS
Net income attributable to MTI	$ 18,032	$ 15,781
Weighted average shares outstanding	17,718,000	18,276,000
Basic earnings per share attributable to MTI	$ 1.02	$ 0.86
Diluted EPS
Net income attributable to MTI	$ 18,032	$ 15,781
Weighted average shares outstanding	17,718,000	18,276,000
Dilutive effect of stock options and stock units	100,000	100,000
Weighted average shares outstanding , adjusted	17,800,000	18,415,000
Diluted earnings per share attributable to MTI	$ 1.01	$ 0.86
Anti-dilutive options not included in the weighted average common shares outstanding calculation	128,943	124,863