Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income attributable to MTI	$ 167.1	$ 84.1	$ 122.2
Weighted average shares outstanding (in shares)	32,100,000	32,500,000	32,700,000
Dilutive effect of stock options and deferred restricted stock units (in shares)	200,000	100,000	100,000
Weighted average shares outstanding, adjusted (in shares)	32,300,000	32,600,000	32,800,000
Basic earnings per share attributable to MTI (in dollars per share)	$ 5.21	$ 2.59	$ 3.74
Diluted earnings per share attributable to MTI (in dollars per share)	$ 5.17	$ 2.58	$ 3.73
Stock Options [Member]
Earnings Per Share [Abstract]
Options outstanding (in shares)	1,425,636	1,514,462	1,363,418
Anti-dilutive securities not included in computation of diluted earnings per share (in shares)	194,412	917,177	754,867