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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table |
​ | 2024 PAY VERSUS PERFORMANCE​ | ​
​ | Fiscal Year | ​ | ​ | (a) | ​ | ​ | (b) | ​ | ​ | (c) | ​ | ​ | (d) | ​ | ​ | (e) | ​ | ​ | (f) | ​ | ​ | (g) | ​ | ​ | (h) | ​
​ | Summary Compensation Table Total– CEO(1) ($) | ​ | ​ | Compensation Actually Paid Total– CEO(2) ($) | ​ | ​ | Summary Compensation Table Total– Non-CEO NEO Average(3) ($) | ​ | ​ | Compensation Actually Paid Total– Non-CEO NEO Average(4) ($) | ​ | ​ | Value of Fixed $100 Investment Based on: | ​ | ​ | Net Income(7) ($M) | ​ | ​ | Adjusted Net Income(8) ($M) | ​ | ​ | Adjusted Operating Income(9) ($M) | ​
​ | MTI TSR(5) ($) | ​ | ​ | Peer Company Index TSR(6) ($) | ​
​ | 2024 | ​ | ​ | ​ | ​ | 7,907,030 | ​ | ​ | ​ | ​ | ​ | 8,360,947 | ​ | ​ | ​ | ​ | ​ | 2,665,258 | ​ | ​ | ​ | ​ | ​ | 2,700,178 | ​ | ​ | ​ | ​ | ​ | 134.81 | ​ | ​ | ​ | ​ | ​ | 131.14 | ​ | ​ | ​ | ​ | ​ | 170.9 | ​ | ​ | ​ | ​ | ​ | 202.6 | ​ | ​ | ​ | ​ | ​ | 315.5 | ​ | ​
​ | 2023 | ​ | ​ | ​ | ​ | 8,355,252 | ​ | ​ | ​ | ​ | ​ | 8,952,346 | ​ | ​ | ​ | ​ | ​ | 2,515,894 | ​ | ​ | ​ | ​ | ​ | 2,592,052 | ​ | ​ | ​ | ​ | ​ | 125.47 | ​ | ​ | ​ | ​ | ​ | 145.78 | ​ | ​ | ​ | ​ | ​ | 88.3 | ​ | ​ | ​ | ​ | ​ | 174.1 | ​ | ​ | ​ | ​ | ​ | 279.9 | ​ | ​
​ | 2022 | ​ | ​ | ​ | ​ | 7,439,476 | ​ | ​ | ​ | ​ | ​ | 6,245,290 | ​ | ​ | ​ | ​ | ​ | 1,926,529 | ​ | ​ | ​ | ​ | ​ | 1,351,820 | ​ | ​ | ​ | ​ | ​ | 106.37 | ​ | ​ | ​ | ​ | ​ | 150.07 | ​ | ​ | ​ | ​ | ​ | 126.3 | ​ | ​ | ​ | ​ | ​ | 164.2 | ​ | ​ | ​ | ​ | ​ | 252.5 | ​ | ​
​ | 2021 | ​ | ​ | ​ | ​ | 7,085,896 | ​ | ​ | ​ | ​ | ​ | 8,148,175 | ​ | ​ | ​ | ​ | ​ | 2,513,207 | ​ | ​ | ​ | ​ | ​ | 2,850,830 | ​ | ​ | ​ | ​ | ​ | 127.74 | ​ | ​ | ​ | ​ | ​ | 172.36 | ​ | ​ | ​ | ​ | ​ | 168.5 | ​ | ​ | ​ | ​ | ​ | 173.8 | ​ | ​ | ​ | ​ | ​ | 240.7 | ​ | ​
​ | 2020 | ​ | ​ | ​ | ​ | 6,149,154 | ​ | ​ | ​ | ​ | ​ | 6,556,778 | ​ | ​ | ​ | ​ | ​ | 2,177,183 | ​ | ​ | ​ | ​ | ​ | 2,275,782 | ​ | ​ | ​ | ​ | ​ | 108.19 | ​ | ​ | ​ | ​ | ​ | 125.06 | ​ | ​ | ​ | ​ | ​ | 115.8 | ​ | ​ | ​ | ​ | ​ | 139.9 | ​ | ​ | ​ | ​ | ​ | 213.0 | ​ | ​
​ (1) Reflects compensation amounts reported in the “Summary Compensation Table” for our CEO (our principal executive officer), Douglas T. Dietrich, for the respective years shown. ​ (2) “Compensation Actually Paid” to our CEO in each of for the respective years shown reflects the respective amounts set forth in column (a) of the table above, adjusted as set forth below in Reconciliation of Summary Compensation Table to Compensation Actually Paid, in accordance with SEC rules. ​ (3) Reflects average compensation amounts reported in the “Summary Compensation Table” for our non-CEO NEOs for the respective years shown. The following non-CEO NEOs are included in the average figures shown: ​ 2024: Erik C. Aldag, D.J. Monagle, III, Brett Argirakis, Jonathan J. Hastings 2023: Erik C. Aldag, D.J. Monagle, III, Jonathan J. Hastings, Brett Argirakis 2022: Eric C. Aldag, D.J. Monagle, III, Jonathan J. Hastings, Thomas J. Meek, Matthew E. Garth 2021: Matthew E. Garth, D.J. Monagle, III, Jonathan J. Hastings, Thomas J. Meek 2020: Matthew E. Garth, D.J. Monagle, III, Jonathan J. Hastings, Thomas J. Meek (4) “Compensation Actually Paid” to our non-CEO NEOs (the persons set forth in note (3) above) in each of the respective years shown reflects the respective amounts set forth in column (c) of the table above, adjusted as set forth below in Reconciliation of Summary Compensation Table to Compensation Actually Paid, in accordance with SEC rules. ​ (5) Represents the cumulative total shareholder return (TSR) of a $100 investment in the Company from the beginning of fiscal year 2020 through December 31 of each of 2024, 2023, 2022, 2021 and 2020, respectively. TSR includes share price appreciation and assumes dividend reinvestment. ​ (6) Represents the cumulative TSR of a $100 investment in the group of companies used by the Company for reference in setting overall compensation for our executives (“Peer Group TSR”) from the beginning of fiscal year 2020 through December 31 of each of 2024, 2023, 2022, 2021 and 2020 respectively. The specific companies constituting such peer group in each year is set forth in the Compensation Discussion & Analysis section of the proxy statement reporting pay for such fiscal year. TSR includes share price appreciation and assumes dividend reinvestment and is weighted accordingly to the respective companies’ stock market capitalization at the beginning of each period for which a return is indicated. ​ (7) Reflects “Consolidated Net Income” in the company’s Consolidated Income Statements included in the Company’s Annual Reports on Form 10-K for each of the years ended December 31, 2024, 2023, 2022, 2021 and 2020. ​ (8) Reflects “Adjusted Net Income” for each of the years ended December 31, 2024, 2023, 2022, 2021, and 2020 which is Net Income, excluding special items, which is a non-GAAP measure. Adjusted Net Income is a supplemental non-GAAP measure that we believe provides meaningful supplemental information regarding our performance, as Consolidated Net Income includes special items that are not indicative of the ongoing operating results and thereby affect the comparability of results between periods. See Appendix A for a reconciliation to GAAP Consolidated Net Income. ​ (9) Company-selected measure is Adjusted Operating Income, excluding special items, which is a non-GAAP financial measure. See Appendix A for a reconciliation to GAAP Operating Income. ​ RECONCILIATION OF SUMMARY COMPENSATION TABLE TO COMPENSATION ACTUALLY PAID SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine CAP as reported in the “Pay Versus Performance Table” above. The CAP amounts do not reflect the actual amount of compensation earned by or paid to our executives during the applicable years, but rather are amounts determined in accordance with Item 402(v) of Regulation S-K. The following table details the applicable adjustments that were made to determine CAP (all amounts for the NEOs other than the CEO are averages):
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Reported Summary Compensation Table Total ($) | ​ | ​ | Deduct: Reported Value of Equity Awards(1) ($) | ​ | ​ | Add: Equity Award Adjustments(2) ($) | ​ | ​ | Deduct: Reported Change in the Actuarial Present Value of Pension Benefits(3) ($) | ​ | ​ | Add: Pension Benefit Adjustments(4) ($) | ​ | ​ | Compensation Actually Paid ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 7,907,030 | ​ | ​ | ​ | ​ | ​ | 2,923,868 | ​ | ​ | ​ | ​ | ​ | 3,123,471 | ​ | ​ | ​ | ​ | ​ | (180,815) | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​ | ​ | ​ | ​ | 8,360,947 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 8,355,252 | ​ | ​ | ​ | ​ | ​ | 3,644,434 | ​ | ​ | ​ | ​ | ​ | 4,578,216 | ​ | ​ | ​ | ​ | ​ | 413,206 | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​ | ​ | ​ | ​ | 8,952,346 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 7,439,476 | ​ | ​ | ​ | ​ | ​ | 3,193,769 | ​ | ​ | ​ | ​ | ​ | 2,289,319 | ​ | ​ | ​ | ​ | ​ | 366,896 | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​ | ​ | ​ | ​ | 6,245,290 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 7,085,896 | ​ | ​ | ​ | ​ | ​ | 2,880,003 | ​ | ​ | ​ | ​ | ​ | 3,906,225 | ​ | ​ | ​ | ​ | ​ | 47,892 | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​ | ​ | ​ | ​ | 8,148,175 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 6,149,154 | ​ | ​ | ​ | ​ | ​ | 2,880,022 | ​ | ​ | ​ | ​ | ​ | 3,323,929 | ​ | ​ | ​ | ​ | ​ | 113,871 | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​ | ​ | ​ | ​ | 6,556,778 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 2,665,258 | ​ | ​ | ​ | ​ | ​ | 822,630 | ​ | ​ | ​ | ​ | ​ | 884,301 | ​ | ​ | ​ | ​ | ​ | 36,545 | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​ | ​ | ​ | ​ | 2,700,178 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 2,515,894 | ​ | ​ | ​ | ​ | ​ | 907,850 | ​ | ​ | ​ | ​ | ​ | 1,115,584 | ​ | ​ | ​ | ​ | ​ | 140,946 | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​ | ​ | ​ | ​ | 2,592,052 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 1,926,529 | ​ | ​ | ​ | ​ | ​ | 784,613 | ​ | ​ | ​ | ​ | ​ | 232,604 | ​ | ​ | ​ | ​ | ​ | 37,104 | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​ | ​ | ​ | ​ | 1,351,820 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 2,513,207 | ​ | ​ | ​ | ​ | ​ | 839,071 | ​ | ​ | ​ | ​ | ​ | 1,169,933 | ​ | ​ | ​ | ​ | ​ | 13,690 | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​ | ​ | ​ | ​ | 2,850,830 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 2,177,183 | ​ | ​ | ​ | ​ | ​ | 812,473 | ​ | ​ | ​ | ​ | ​ | 924,410 | ​ | ​ | ​ | ​ | ​ | 34,522 | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​ | ​ | ​ | ​ | 2,275,782 | ​ | ​
​ (1) The reported value of equity awards represents the grant date fair value of equity awards as reported in the “Stock Awards” and “Option Awards” columns of the Summary Compensation Table for each applicable year. ​ (2) The equity award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following: ​ (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; ​ (ii) the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; ​ (iii) for awards that are granted and vest in same applicable year, the fair value as of the vesting date; ​ (iv) for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year); ​ (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the applicable year, a deduction for the amount equal to the fair value at the end of the prior fiscal year; and ​ (vi) the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year. ​ The amounts deducted or added in calculating the equity award adjustments are as follows:
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Year End Fair Value of Equity Awards Granted During the Year ($) | ​ | ​ | Year-over-Year Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year ($) | ​ | ​ | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($) | ​ | ​ | Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($) | ​ | ​ | Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Reflected in Fair Value or Total Compensation ($) | ​ | ​ | Total Equity Award Adjustments ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 3,231,960 | ​ | ​ | ​ | ​ | ​ | 150,683 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (259,172) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,123,471 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 3,882,533 | ​ | ​ | ​ | ​ | ​ | 411,274 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 284,409 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 4,578,216 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 2,876,810 | ​ | ​ | ​ | ​ | ​ | (481,710) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (105,781) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 2,289,319 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 3,318,797 | ​ | ​ | ​ | ​ | ​ | 465,055 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 122,373 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,906,225 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 3,210,509 | ​ | ​ | ​ | ​ | ​ | 137,746 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (24,326) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,323,929 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 909,311 | ​ | ​ | ​ | ​ | ​ | 35,872 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (60,882) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 884,301 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 967,482 | ​ | ​ | ​ | ​ | ​ | 89,057 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 59,045 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,115,584 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 543,381 | ​ | ​ | ​ | ​ | ​ | (85,220) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (26,604) | ​ | ​ | ​ | ​ | ​ | (198,953) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 232,604 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 967,065 | ​ | ​ | ​ | ​ | ​ | 139,116 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 63,752 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,169,933 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 905,705 | ​ | ​ | ​ | ​ | ​ | 51,679 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (32,974) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 924,410 | ​ | ​
​ (3) The amounts in this column represent the amounts reported in “Change in Pension and Nonqualified Deferred Compensation” column of the Summary Compensation Table for each applicable year. ​ (4) The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by the executive during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case, calculated in accordance with U.S. GAAP. The amounts deducted or added in calculating the pension benefit adjustments are as follows: ​
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Service Cost ($) | ​ | ​ | Prior Service Cost ($) | ​ | ​ | Total Pension Benefit Adjustments ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​
Company Selected Measure Name | Adjusted Operating Income |  |  |  |
Named Executive Officers, Footnote | Reflects compensation amounts reported in the “Summary Compensation Table” for our CEO (our principal executive officer), Douglas T. Dietrich, for the respective years shown. Reflects average compensation amounts reported in the “Summary Compensation Table” for our non-CEO NEOs for the respective years shown. The following non-CEO NEOs are included in the average figures shown: ​ 2024: Erik C. Aldag, D.J. Monagle, III, Brett Argirakis, Jonathan J. Hastings 2023: Erik C. Aldag, D.J. Monagle, III, Jonathan J. Hastings, Brett Argirakis 2022: Eric C. Aldag, D.J. Monagle, III, Jonathan J. Hastings, Thomas J. Meek, Matthew E. Garth 2021: Matthew E. Garth, D.J. Monagle, III, Jonathan J. Hastings, Thomas J. Meek 2020: Matthew E. Garth, D.J. Monagle, III, Jonathan J. Hastings, Thomas J. Meek |  |  |  |
Peer Group Issuers, Footnote | Represents the cumulative TSR of a $100 investment in the group of companies used by the Company for reference in setting overall compensation for our executives (“Peer Group TSR”) from the beginning of fiscal year 2020 through December 31 of each of 2024, 2023, 2022, 2021 and 2020 respectively. The specific companies constituting such peer group in each year is set forth in the Compensation Discussion & Analysis section of the proxy statement reporting pay for such fiscal year. TSR includes share price appreciation and assumes dividend reinvestment and is weighted accordingly to the respective companies’ stock market capitalization at the beginning of each period for which a return is indicated. |  |  |  |
PEO Total Compensation Amount | $ 7,907,030 | $ 8,355,252 | $ 7,439,476 | $ 7,085,896 | $ 6,149,154
PEO Actually Paid Compensation Amount | $ 8,360,947 | 8,952,346 | 6,245,290 | 8,148,175 | 6,556,778
Adjustment To PEO Compensation, Footnote | The following table details the applicable adjustments that were made to determine CAP (all amounts for the NEOs other than the CEO are averages):
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Reported Summary Compensation Table Total ($) | ​ | ​ | Deduct: Reported Value of Equity Awards(1) ($) | ​ | ​ | Add: Equity Award Adjustments(2) ($) | ​ | ​ | Deduct: Reported Change in the Actuarial Present Value of Pension Benefits(3) ($) | ​ | ​ | Add: Pension Benefit Adjustments(4) ($) | ​ | ​ | Compensation Actually Paid ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 7,907,030 | ​ | ​ | ​ | ​ | ​ | 2,923,868 | ​ | ​ | ​ | ​ | ​ | 3,123,471 | ​ | ​ | ​ | ​ | ​ | (180,815) | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​ | ​ | ​ | ​ | 8,360,947 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 8,355,252 | ​ | ​ | ​ | ​ | ​ | 3,644,434 | ​ | ​ | ​ | ​ | ​ | 4,578,216 | ​ | ​ | ​ | ​ | ​ | 413,206 | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​ | ​ | ​ | ​ | 8,952,346 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 7,439,476 | ​ | ​ | ​ | ​ | ​ | 3,193,769 | ​ | ​ | ​ | ​ | ​ | 2,289,319 | ​ | ​ | ​ | ​ | ​ | 366,896 | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​ | ​ | ​ | ​ | 6,245,290 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 7,085,896 | ​ | ​ | ​ | ​ | ​ | 2,880,003 | ​ | ​ | ​ | ​ | ​ | 3,906,225 | ​ | ​ | ​ | ​ | ​ | 47,892 | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​ | ​ | ​ | ​ | 8,148,175 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 6,149,154 | ​ | ​ | ​ | ​ | ​ | 2,880,022 | ​ | ​ | ​ | ​ | ​ | 3,323,929 | ​ | ​ | ​ | ​ | ​ | 113,871 | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​ | ​ | ​ | ​ | 6,556,778 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 2,665,258 | ​ | ​ | ​ | ​ | ​ | 822,630 | ​ | ​ | ​ | ​ | ​ | 884,301 | ​ | ​ | ​ | ​ | ​ | 36,545 | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​ | ​ | ​ | ​ | 2,700,178 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 2,515,894 | ​ | ​ | ​ | ​ | ​ | 907,850 | ​ | ​ | ​ | ​ | ​ | 1,115,584 | ​ | ​ | ​ | ​ | ​ | 140,946 | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​ | ​ | ​ | ​ | 2,592,052 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 1,926,529 | ​ | ​ | ​ | ​ | ​ | 784,613 | ​ | ​ | ​ | ​ | ​ | 232,604 | ​ | ​ | ​ | ​ | ​ | 37,104 | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​ | ​ | ​ | ​ | 1,351,820 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 2,513,207 | ​ | ​ | ​ | ​ | ​ | 839,071 | ​ | ​ | ​ | ​ | ​ | 1,169,933 | ​ | ​ | ​ | ​ | ​ | 13,690 | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​ | ​ | ​ | ​ | 2,850,830 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 2,177,183 | ​ | ​ | ​ | ​ | ​ | 812,473 | ​ | ​ | ​ | ​ | ​ | 924,410 | ​ | ​ | ​ | ​ | ​ | 34,522 | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​ | ​ | ​ | ​ | 2,275,782 | ​ | ​
​ (1) The reported value of equity awards represents the grant date fair value of equity awards as reported in the “Stock Awards” and “Option Awards” columns of the Summary Compensation Table for each applicable year. ​ (2) The equity award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following: ​ (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; ​ (ii) the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; ​ (iii) for awards that are granted and vest in same applicable year, the fair value as of the vesting date; ​ (iv) for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year); ​ (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the applicable year, a deduction for the amount equal to the fair value at the end of the prior fiscal year; and ​ (vi) the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year. ​ The amounts deducted or added in calculating the equity award adjustments are as follows:
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Year End Fair Value of Equity Awards Granted During the Year ($) | ​ | ​ | Year-over-Year Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year ($) | ​ | ​ | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($) | ​ | ​ | Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($) | ​ | ​ | Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Reflected in Fair Value or Total Compensation ($) | ​ | ​ | Total Equity Award Adjustments ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 3,231,960 | ​ | ​ | ​ | ​ | ​ | 150,683 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (259,172) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,123,471 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 3,882,533 | ​ | ​ | ​ | ​ | ​ | 411,274 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 284,409 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 4,578,216 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 2,876,810 | ​ | ​ | ​ | ​ | ​ | (481,710) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (105,781) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 2,289,319 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 3,318,797 | ​ | ​ | ​ | ​ | ​ | 465,055 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 122,373 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,906,225 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 3,210,509 | ​ | ​ | ​ | ​ | ​ | 137,746 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (24,326) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,323,929 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 909,311 | ​ | ​ | ​ | ​ | ​ | 35,872 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (60,882) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 884,301 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 967,482 | ​ | ​ | ​ | ​ | ​ | 89,057 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 59,045 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,115,584 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 543,381 | ​ | ​ | ​ | ​ | ​ | (85,220) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (26,604) | ​ | ​ | ​ | ​ | ​ | (198,953) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 232,604 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 967,065 | ​ | ​ | ​ | ​ | ​ | 139,116 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 63,752 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,169,933 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 905,705 | ​ | ​ | ​ | ​ | ​ | 51,679 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (32,974) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 924,410 | ​ | ​
​ (3) The amounts in this column represent the amounts reported in “Change in Pension and Nonqualified Deferred Compensation” column of the Summary Compensation Table for each applicable year. ​ (4) The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by the executive during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case, calculated in accordance with U.S. GAAP. The amounts deducted or added in calculating the pension benefit adjustments are as follows: ​
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Service Cost ($) | ​ | ​ | Prior Service Cost ($) | ​ | ​ | Total Pension Benefit Adjustments ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​
Non-PEO NEO Average Total Compensation Amount | $ 2,665,258 | 2,515,894 | 1,926,529 | 2,513,207 | 2,177,183
Non-PEO NEO Average Compensation Actually Paid Amount | $ 2,700,178 | 2,592,052 | 1,351,820 | 2,850,830 | 2,275,782
Adjustment to Non-PEO NEO Compensation Footnote | The following table details the applicable adjustments that were made to determine CAP (all amounts for the NEOs other than the CEO are averages):
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Reported Summary Compensation Table Total ($) | ​ | ​ | Deduct: Reported Value of Equity Awards(1) ($) | ​ | ​ | Add: Equity Award Adjustments(2) ($) | ​ | ​ | Deduct: Reported Change in the Actuarial Present Value of Pension Benefits(3) ($) | ​ | ​ | Add: Pension Benefit Adjustments(4) ($) | ​ | ​ | Compensation Actually Paid ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 7,907,030 | ​ | ​ | ​ | ​ | ​ | 2,923,868 | ​ | ​ | ​ | ​ | ​ | 3,123,471 | ​ | ​ | ​ | ​ | ​ | (180,815) | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​ | ​ | ​ | ​ | 8,360,947 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 8,355,252 | ​ | ​ | ​ | ​ | ​ | 3,644,434 | ​ | ​ | ​ | ​ | ​ | 4,578,216 | ​ | ​ | ​ | ​ | ​ | 413,206 | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​ | ​ | ​ | ​ | 8,952,346 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 7,439,476 | ​ | ​ | ​ | ​ | ​ | 3,193,769 | ​ | ​ | ​ | ​ | ​ | 2,289,319 | ​ | ​ | ​ | ​ | ​ | 366,896 | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​ | ​ | ​ | ​ | 6,245,290 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 7,085,896 | ​ | ​ | ​ | ​ | ​ | 2,880,003 | ​ | ​ | ​ | ​ | ​ | 3,906,225 | ​ | ​ | ​ | ​ | ​ | 47,892 | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​ | ​ | ​ | ​ | 8,148,175 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 6,149,154 | ​ | ​ | ​ | ​ | ​ | 2,880,022 | ​ | ​ | ​ | ​ | ​ | 3,323,929 | ​ | ​ | ​ | ​ | ​ | 113,871 | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​ | ​ | ​ | ​ | 6,556,778 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 2,665,258 | ​ | ​ | ​ | ​ | ​ | 822,630 | ​ | ​ | ​ | ​ | ​ | 884,301 | ​ | ​ | ​ | ​ | ​ | 36,545 | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​ | ​ | ​ | ​ | 2,700,178 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 2,515,894 | ​ | ​ | ​ | ​ | ​ | 907,850 | ​ | ​ | ​ | ​ | ​ | 1,115,584 | ​ | ​ | ​ | ​ | ​ | 140,946 | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​ | ​ | ​ | ​ | 2,592,052 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 1,926,529 | ​ | ​ | ​ | ​ | ​ | 784,613 | ​ | ​ | ​ | ​ | ​ | 232,604 | ​ | ​ | ​ | ​ | ​ | 37,104 | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​ | ​ | ​ | ​ | 1,351,820 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 2,513,207 | ​ | ​ | ​ | ​ | ​ | 839,071 | ​ | ​ | ​ | ​ | ​ | 1,169,933 | ​ | ​ | ​ | ​ | ​ | 13,690 | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​ | ​ | ​ | ​ | 2,850,830 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 2,177,183 | ​ | ​ | ​ | ​ | ​ | 812,473 | ​ | ​ | ​ | ​ | ​ | 924,410 | ​ | ​ | ​ | ​ | ​ | 34,522 | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​ | ​ | ​ | ​ | 2,275,782 | ​ | ​
​ (1) The reported value of equity awards represents the grant date fair value of equity awards as reported in the “Stock Awards” and “Option Awards” columns of the Summary Compensation Table for each applicable year. ​ (2) The equity award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following: ​ (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; ​ (ii) the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; ​ (iii) for awards that are granted and vest in same applicable year, the fair value as of the vesting date; ​ (iv) for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year); ​ (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the applicable year, a deduction for the amount equal to the fair value at the end of the prior fiscal year; and ​ (vi) the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year. ​ The amounts deducted or added in calculating the equity award adjustments are as follows:
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Year End Fair Value of Equity Awards Granted During the Year ($) | ​ | ​ | Year-over-Year Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year ($) | ​ | ​ | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($) | ​ | ​ | Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($) | ​ | ​ | Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Reflected in Fair Value or Total Compensation ($) | ​ | ​ | Total Equity Award Adjustments ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 3,231,960 | ​ | ​ | ​ | ​ | ​ | 150,683 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (259,172) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,123,471 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 3,882,533 | ​ | ​ | ​ | ​ | ​ | 411,274 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 284,409 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 4,578,216 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 2,876,810 | ​ | ​ | ​ | ​ | ​ | (481,710) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (105,781) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 2,289,319 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 3,318,797 | ​ | ​ | ​ | ​ | ​ | 465,055 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 122,373 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,906,225 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 3,210,509 | ​ | ​ | ​ | ​ | ​ | 137,746 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (24,326) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 3,323,929 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 909,311 | ​ | ​ | ​ | ​ | ​ | 35,872 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (60,882) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 884,301 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 967,482 | ​ | ​ | ​ | ​ | ​ | 89,057 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 59,045 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,115,584 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 543,381 | ​ | ​ | ​ | ​ | ​ | (85,220) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (26,604) | ​ | ​ | ​ | ​ | ​ | (198,953) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 232,604 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 967,065 | ​ | ​ | ​ | ​ | ​ | 139,116 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 63,752 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,169,933 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 905,705 | ​ | ​ | ​ | ​ | ​ | 51,679 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (32,974) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 924,410 | ​ | ​
​ (3) The amounts in this column represent the amounts reported in “Change in Pension and Nonqualified Deferred Compensation” column of the Summary Compensation Table for each applicable year. ​ (4) The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by the executive during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case, calculated in accordance with U.S. GAAP. The amounts deducted or added in calculating the pension benefit adjustments are as follows: ​
​ | Executive | ​ | ​ | Fiscal Year | ​ | ​ | Service Cost ($) | ​ | ​ | Prior Service Cost ($) | ​ | ​ | Total Pension Benefit Adjustments ($) | ​
​ | CEO | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 73,499 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 76,518 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 77,160 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 83,949 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 77,588 | ​ | ​
​ | Non-CEO Named Executive Officers | ​ | ​ | ​ | ​ | 2024 | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 9,794 | ​ | ​
​ | ​ | ​ | 2023 | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 9,370 | ​ | ​
​ | ​ | ​ | 2022 | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 14,404 | ​ | ​
​ | ​ | ​ | 2021 | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 20,451 | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 21,184 | ​ | ​
Compensation Actually Paid vs. Total Shareholder Return |  |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  |  |  |  |
Total Shareholder Return Vs Peer Group |  |  |  |  |
Tabular List, Table | OUR MOST IMPORTANT METRICS USED FOR LINKING PAY AND PERFORMANCE
​ | Measure | ​ | ​ | Explanation | ​
​ | ADJUSTED OPERATING INCOME (OI) | ​ | ​ | Operating Income, excluding special items (a non-GAAP financial measure), is a component of our Annual Incentive Plan. It measures the immediate impact of operating decisions on the Company’s annual performance. | ​
​ | RETURN ON NET ASSETS (RONA) | ​ | ​ | Return on Net Assets is a component of our Annual Incentive Plan. RONA is a financial measure that measures the efficiency with which we allocate capital resources and profitability, with our business leadership having direct influence on the outcome of this metric. | ​
​ | RETURN ON CAPITAL (ROC) | ​ | ​ | Return on Capital is a component of our Performance Units. ROC is a financial measure that measures the efficiency with which we allocate capital resources, considering not just the quantity of earnings, but also the quality of earnings and investments that drive sustainable growth. | ​
​ | TOTAL SHAREHOLDER RETURN (TSR) VS. OUR PEERS AND THE COMPANIES IN THE RUSSELL 2000 AND S&P SMALLCAP 600 INDICES | ​ | ​ | TSR vs. Our Peers and the Companies in the Russell 2000 and S&P SmallCap 600 Indices is a component of our Performance Units. TSR measures our ability to return value to our shareholders compared to our peers and to broader indices reflecting comparable investment opportunities. | ​
​ | WORKING CAPITAL | ​ | ​ | Working Capital Improvement is a significant portion of the Personal Performance component of our Annual Incentive Plan. | ​
​ | OVERALL LEADERSHIP, INCLUDING DEPLOYMENT OF LEAN OPERATING PRINCIPLES AND ACHIEVEMENT OF HOSHIN PLANS | ​ | ​ | Overall Leadership (a non-financial performance measure) encompasses contributions to safety and sustainability, diversity and inclusion, and other areas of importance to the Company. Deployment of Lean Operating Principles (a non-financial performance measure) measures adherence to a key cultural element of the Company. Hoshin is a structured methodology for executing and achieving strategic goals and objectives. Together, this is a significant portion of the Personal Performance component of our Annual Incentive Plan. | ​
Total Shareholder Return Amount | $ 134.81 | 125.47 | 106.37 | 127.74 | 108.19
Peer Group Total Shareholder Return Amount | 131.14 | 145.78 | 150.07 | 172.36 | 125.06
Net Income (Loss) | $ 170,900,000 | $ 88,300,000 | $ 126,300,000 | $ 168,500,000 | $ 115,800,000
Company Selected Measure Amount | 315,500,000 | 279,900,000 | 252,500,000 | 240,700,000 | 213,000,000
PEO Name | Douglas T. Dietrich |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Compensation Actually Paid vs. Other Measure |  |  |  |  |
Other Performance Measure, Amount | 202,600,000 | 174,100,000 | 164,200,000 | 173,800,000 | 139,900,000
Name | Adjusted Net Income |  |  |  |
Non-GAAP Measure Description | Reflects “Adjusted Net Income” for each of the years ended December 31, 2024, 2023, 2022, 2021, and 2020 which is Net Income, excluding special items, which is a non-GAAP measure. Adjusted Net Income is a supplemental non-GAAP measure that we believe provides meaningful supplemental information regarding our performance, as Consolidated Net Income includes special items that are not indicative of the ongoing operating results and thereby affect the comparability of results between periods. See Appendix A for a reconciliation to GAAP Consolidated Net Income. |  |  |  |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | ADJUSTED OPERATING INCOME (OI) |  |  |  |
Non-GAAP Measure Description | Company-selected measure is Adjusted Operating Income, excluding special items, which is a non-GAAP financial measure. See Appendix A for a reconciliation to GAAP Operating Income. |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | RETURN ON NET ASSETS (RONA) |  |  |  |
Measure:: 4 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | RETURN ON CAPITAL (ROC) |  |  |  |
Measure:: 5 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | TOTAL SHAREHOLDER RETURN (TSR) VS. OUR PEERS AND THE COMPANIES IN THE RUSSELL 2000 AND S&P SMALLCAP 600 INDICES |  |  |  |
Measure:: 6 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | WORKING CAPITAL |  |  |  |
Measure:: 7 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | OVERALL LEADERSHIP, INCLUDING DEPLOYMENT OF LEAN OPERATING PRINCIPLES AND ACHIEVEMENT OF HOSHIN PLANS |  |  |  |
PEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ (180,815) | $ 413,206 | $ 366,896 | $ 47,892 | $ 113,871
PEO | Aggregate Pension Adjustments Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 73,499 | 76,518 | 77,160 | 83,949 | 77,588
PEO | Pension Adjustments Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 73,499 | 76,518 | 77,160 | 83,949 | 77,588
PEO | Pension Adjustments Prior Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 2,923,868 | 3,644,434 | 3,193,769 | 2,880,003 | 2,880,022
PEO | Equity Awards Adjustments, Excluding Value Reported in Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 3,123,471 | 4,578,216 | 2,289,319 | 3,906,225 | 3,323,929
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 150,683 | 411,274 | (481,710) | 465,055 | 137,746
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (259,172) | 284,409 | (105,781) | 122,373 | (24,326)
PEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
PEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
PEO | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 3,231,960 | 3,882,533 | 2,876,810 | 3,318,797 | 3,210,509
Non-PEO NEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 36,545 | 140,946 | 37,104 | 13,690 | 34,522
Non-PEO NEO | Aggregate Pension Adjustments Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 9,794 | 9,370 | 14,404 | 20,451 | 21,184
Non-PEO NEO | Pension Adjustments Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 9,794 | 9,370 | 14,404 | 20,451 | 21,184
Non-PEO NEO | Pension Adjustments Prior Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 822,630 | 907,850 | 784,613 | 839,071 | 812,473
Non-PEO NEO | Equity Awards Adjustments, Excluding Value Reported in Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 884,301 | 1,115,584 | 232,604 | 1,169,933 | 924,410
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 35,872 | 89,057 | (85,220) | 139,116 | 51,679
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (60,882) | 59,045 | (26,604) | 63,752 | (32,974)
Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (198,953) |  |
Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  |  |
Non-PEO NEO | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 909,311 | $ 967,482 | $ 543,381 | $ 967,065 | $ 905,705

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