Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Data (unaudited) [Abstract]

Quarterly Financial Data (unaudited)

Note 22.  Quarterly Financial Data (unaudited)

	2018 Quarters
(millions of dollars, except per share data)	First		Second		Third		Fourth
Net sales by segment
Performance Materials segment	$	187.3	$	214.5	$	219.5	$	206.8
Specialty Minerals segment		149.6		150.9		146.3		142.5
Refractories segment		75.3		79.6		79.1		77.9
Energy Services segment		19.1		19.7		19.2		20.3
Net sales		431.3		464.7		464.1		447.5
Gross profit		113.5		115.9		119.2		112.8
Income from operations		62.6		62.8		68.2		62.3
Consolidated net income		41.1		45.2		42.9		44.0
Net income attributable to Minerals Technologies Inc. (MTI)		39.9		44.1		41.9		43.1
Basic earnings per share attributable to MTI shareholders	$	1.13	$	1.25	$	1.19	$	1.22
Diluted earnings per share attributable to MTI shareholders	$	1.12	$	1.24	$	1.18	$	1.22
Market price range per share of common stock:
High	$	76.95	$	76.40	$	77.75	$	$ 67.65
Low	$	66.10	$	65.10	$	65.75	$	$ 47.89
Close	$	66.95	$	75.35	$	67.60	$	$ 51.34
Dividends paid per common share	$	0.05	$	0.05	$	0.05	$	0.05

	2017 Quarters
(millions of dollars, except per share data)	First		Second		Third		Fourth
Net sales by segment
Performance Materials segment	$	169.9	$	180.3	$	188.8	$	195.8
Specialty Minerals segment		146.2		147.0		147.7		143.9
Refractories segment		70.2		68.9		69.0		71.3
Energy Services segment		18.7		17.9		19.0		21.1
Net sales		405.0		414.1		424.5		432.1
Gross profit		113.7		119.7		119.3		114.5
Income from operations		62.1		69.0		67.2		46.1
Consolidated net income		35.6		43.8		42.8		76.7
Net income attributable to MTI		34.6		43.0		41.7		75.8
Basic earnings per share attributable to MTI shareholders	$	0.99	$	1.23	$	1.18	$	2.14
Diluted earnings per share attributable to MTI shareholders	$	0.97	$	1.21	$	1.17	$	2.12
Market price range per share of common stock:
High	$	83.70	$	80.20	$	75.60	$	73.55
Low	$	72.20	$	70.50	$	62.95	$	66.40
Close	$	76.60	$	73.20	$	70.65	$	68.85
Dividends paid per common share	$	0.05	$	0.05	$	0.05	$	0.05