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Quarterly Financial Data (unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Data (unaudited) [Abstract] |
Quarterly Financial Data (unaudited) | Note 23. Quarterly Financial Data (unaudited)
|  | 2020 Quarters |
(millions of dollars, except per share data) |  | First |  |  | Second |  |  | Third |  |  | Fourth |
Net sales by segment |  |  |  |  |  |  |  |  |  |  |  |
Performance Materials segment |  | $ | 186.2 |  |  | $ | 173.8 |  |  | $ | 190.6 |  |  | $ | 202.2 |
Specialty Minerals segment |  |  | 137.1 |  |  |  | 109.8 |  |  |  | 125.1 |  |  |  | 138.9 |
Refractories segment |  |  | 69.0 |  |  |  | 55.9 |  |  |  | 59.3 |  |  |  | 73.9 |
Energy Services segment |  |  | 25.2 |  |  |  | 17.7 |  |  |  | 13.3 |  |  |  | 16.8 |
Net sales |  |  | 417.5 |  |  |  | 357.2 |  |  |  | 388.3 |  |  |  | 431.8 |
Gross profit |  |  | 106.8 |  |  |  | 88.9 |  |  |  | 98.4 |  |  |  | 111.3 |
Income from operations |  |  | 57.7 |  |  |  | 27.2 |  |  |  | 48.5 |  |  |  | 54.5 |
Consolidated net income |  |  | 39.6 |  |  |  | 14.9 |  |  |  | 29.3 |  |  |  | 32.0 |
Net income attributable to MTI |  |  | 38.6 |  |  |  | 14.4 |  |  |  | 28.3 |  |  |  | 31.1 |
Basic earnings per share attributable to MTI shareholders |  | $ | 1.12 |  |  | $ | 0.42 |  |  | $ | 0.83 |  |  | $ | 0.91 |
Diluted earnings per share attributable to MTI shareholders |  | $ | 1.12 |  |  | $ | 0.42 |  |  | $ | 0.83 |  |  | $ | 0.91 |
Market price range per share of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 58.91 |  |  | $ | 55.42 |  |  | $ | 53.34 |  |  | $ | 64.16 |
Low |  | $ | 28.90 |  |  | $ | 31.91 |  |  | $ | 43.11 |  |  | $ | 51.10 |
Close |  | $ | 32.48 |  |  | $ | 43.20 |  |  | $ | 49.23 |  |  | $ | 62.12 |
Dividends paid per common share |  | $ | 0.05 |  |  | $ | 0.05 |  |  | $ | 0.05 |  |  | $ | 0.05 |
|  | 2019 Quarters |
(millions of dollars, except per share data) |  | First |  |  | Second |  |  | Third |  |  | Fourth |
Net sales by segment |  |  |  |  |  |  |  |  |  |  |  |
Performance Materials segment |  | $ | 199.2 |  |  | $ | 215.4 |  |  | $ | 207.3 |  |  | $ | 201.4 |
Specialty Minerals segment |  |  | 144.4 |  |  |  | 145.1 |  |  |  | 143.1 |  |  |  | 141.8 |
Refractories segment |  |  | 73.8 |  |  |  | 77.5 |  |  |  | 73.4 |  |  |  | 73.4 |
Energy Services segment |  |  | 20.3 |  |  |  | 25.8 |  |  |  | 25.5 |  |  |  | 23.6 |
Net sales |  |  | 437.7 |  |  |  | 463.8 |  |  |  | 449.3 |  |  |  | 440.2 |
Gross profit |  |  | 109.7 |  |  |  | 112.0 |  |  |  | 111.2 |  |  |  | 107.7 |
Income from operations |  |  | 62.0 |  |  |  | 45.5 |  |  |  | 53.5 |  |  |  | 47.7 |
Consolidated net income |  |  | 40.0 |  |  |  | 27.6 |  |  |  | 39.1 |  |  |  | 29.6 |
Net income attributable to Minerals Technologies Inc. (MTI) |  |  | 39.1 |  |  |  | 26.6 |  |  |  | 38.0 |  |  |  | 29.0 |
Basic earnings per share attributable to MTI shareholders |  | $ | 1.11 |  |  | $ | 0.76 |  |  | $ | 1.09 |  |  | $ | 0.83 |
Diluted earnings per share attributable to MTI shareholders |  | $ | 1.11 |  |  | $ | 0.75 |  |  | $ | 1.08 |  |  | $ | 0.83 |
Market price range per share of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 61.01 |  |  | $ | 63.20 |  |  | $ | 55.33 |  |  | $ | 58.12 |
Low |  | $ | 49.47 |  |  | $ | 51.78 |  |  | $ | 45.55 |  |  | $ | 48.92 |
Close |  | $ | 58.79 |  |  | $ | 53.51 |  |  | $ | 52.77 |  |  | $ | 57.63 |
Dividends paid per common share |  | $ | 0.05 |  |  | $ | 0.05 |  |  | $ | 0.05 |  |  | $ | 0.05 |

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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