Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

Millions of Dollars, Except Per Share Amounts

2013 Quarters					First			Second			Third		Fourth
Net Sales by Major Product Line
	PCC			$	137.2		$	135.6		$	135.9	$	138.3
	Processed Minerals				29.6			32.7			31.5		28.8
		Specialty Minerals Segment			166.8			168.3			167.4		167.1
		Refractories Segment			83.6			88.5			86.8		89.5
Net sales					250.4			256.8			254.2		256.6
Gross profit					56.0			58.8			59.9		59.0
Income from operations					28.2			32.4			32.8		33.5
Income from continuing operations					20.3			22.7			22.6		23.6
Loss from discontinued operations					(0.7	)		(5.0	)		--		--
			Net income attributable to MTI…..	$	18.7		$	17.1		$	21.9	$	22.6

Basic EPS:
Income from continuing operations attributable to MTI	$	0.56		$	0.63		$	0.63	$	0.66
Loss from discontinued operations attributable to MTI	$	(0.02	)	$	(0.14	)	$	--	$	--
Net Income attributable to MTI common shareholders	$	0.54		$	0.49		$	0.63	$	0.66

Diluted EPS:
Income from continuing operations attributable to MTI	$	0.55		$	0.63		$	0.63	$	0.65
Loss from discontinued operations attributable to MTI	$	(0.02	)	$	(0.14	)	$	--	$	--
Net Income attributable to MTI common shareholders	$	0.53		$	0.49		$	0.63	$	0.65

Market price range per share of common stock:
	High	$	43.04	$	43.12	$	49.03	$	60.40
	Low	$	39.54	$	38.43	$	42.53	$	49.28
	Close	$	41.51	$	41.34	$	48.95	$	60.07
Dividends paid per common share		$	0.05	$	0.05	$	0.05	$	0.05

2012 Quarters					First			Second			Third			Fourth
Net Sales by Major Product Line
	PCC			$	135.5		$	133.7		$	134.5		$	133.7
	Processed Minerals				29.6			31.8			28.6			26.0
		Specialty Minerals Segment			165.1			165.5			163.1			159.7
		Refractories Segment			89.4			85.9			84.7			83.4
Net sales					254.5			251.4			247.8			243.1
Gross profit					55.6			56.8			55.6			54.3
Income from operations					27.9			30.1			28.6			27.0
Income from continuing operations					19.2			20.7			19.7			19.1
Loss from discontinued operations					(0.6	)		(0.5	)		(0.5	)		(0.9	)
			Net income attributable to MTI	$	18.0		$	19.7		$	18.6		$	17.7

Basic EPS:
Income from continuing operations attributable to MTI	$	0.53		$	0.57		$	0.54		$	0.53
Loss from discontinued operations attributable to MTI	$	(0.02	)	$	(0.01	)	$	(0.01	)	$	(0.03	)
Net Income attributable to MTI common shareholders	$	0.51		$	0.56		$	0.53		$	0.50

Diluted EPS:
Income from continuing operations attributable to MTI	$	0.53		$	0.57		$	0.54		$	0.53
Loss from discontinued operations attributable to MTI	$	(0.02	)	$	(0.01	)	$	(0.01	)	$	(0.03	)
Net Income attributable to MTI common shareholders	$	0.51		$	0.56		$	0.53		$	0.50

Market price range per share of common stock:
	High	$	33.96	$	33.60	$	36.99	$	39.92
	Low	$	28.78	$	30.81	$	30.50	$	34.25
	Close	$	32.70	$	31.89	$	35.46	$	39.92
Dividends paid per common share		$	0.025	$	0.025	$	0.025	$	0.05