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Pension, Postretirement, and Other Benefit Plans | 12 Months Ended
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Dec. 31, 2024
Retirement Benefits [Abstract] |
Pension, Postretirement, and Other Benefit Plans | Pension, Postretirement, and Other Benefit Plans Voluntary Savings Plan The Company maintains a voluntary savings plan covering all employees in the United States. The Plan, known as the Prosperity Plus Savings Plan, is a qualified plan under section 401(k) of the U.S. Internal Revenue Code. The Company matches, in the form of cash, between 50% and 100% of employee contributions up to a defined maximum. The investment of employee contributions to the plan is self-directed. The Company’s cost of the plan amounted to $7.8 million in 2024, $7.3 million in 2023, and $6.6 million in 2022. The plan allows for discretionary matching contributions. The Company uses such discretion to provide profit sharing contributions to plan participants. Such contributions are based on Company performance and vary from year to year and contributions are generally made in the first quarter following the Company’s fiscal year-end. The Company’s profit-sharing plan covers all employees in the United States. After the close of each year, the Board of Directors reviews and approves the amount of the profit-sharing contribution. Company contributions to the plan are in the form of cash. The expense recorded for this plan was $2.4 million in 2024, $4.9 million in 2023, and $4.6 million in 2022. Pension and Postretirement Plans The Company has defined benefit pension and postretirement plans covering certain U.S. and non-U.S. employees. The eligibility, benefit formulas, and contribution requirements for plans vary by location. As of December 31, 2024, U.S. benefit obligations exist through the U.S. Supplemental Executive Retirement Plan (“SERP”), a frozen unfunded pension plan, and the U.S. postretirement welfare plan ("PRW"), which provides various medical, dental, and life insurance benefits. The U.S. Pension Plus Plan, a qualified defined benefit pension plan was terminated in 2021 and settled during 2022, leading to charges totaling $49.1 million. Outside the U.S., the Company sponsors defined benefit pension plans covering certain employees and certain postretirement life insurance benefits to retired employees in Canada. Accounting guidance requires the recognition of the funded status of each defined benefit and other postretirement benefit plan. Each overfunded plan is recognized as an asset and each underfunded plan is recognized as a liability. Company pension plan data for U.S. and non-U.S. plans has been combined for both 2024 and 2023, except where indicated below. The Company’s pension and postretirement benefit costs and benefit obligations are based on actuarial valuations that are affected by many assumptions, the most significant of which are the assumed discount rate, expected rate of return on pension plan assets, and mortality. Each of the assumptions is reviewed and updated annually, as appropriate. The assumed rates of return for pension plan assets are determined for each major asset category based on historical rates of return for assets in that category and expectations of future rates of return based, in part, on simulated future capital market performance. The assumed discount rate is based on yields from a portfolio of currently available high-quality fixed-income investments with durations matching the expected future payments, based on the demographics of the plan participants and the plan provisions. Gains and losses arise from changes in the assumptions used to measure the benefit obligations, and experience different from what had been assumed, including asset returns different than what had been expected. The Company amortizes gains and losses in excess of a “corridor” over the average future service of the plan’s current participants. The corridor is defined as 10% of the greater of the plan’s projected benefit obligation or market-related value of plan assets. The market-related value of plan assets is also used to determine the expected return on plan assets component of net periodic cost. To the extent the Company’s unrecognized net losses and unrecognized prior service costs, including the amount recognized through accumulated other comprehensive income, are not reduced by future favorable plan experience, they will be recognized as a component of the net periodic cost in future years. The following table sets forth the plan benefit obligations:
|  | As of December 31, 2024 |  | As of December 31, 2023
(in thousands, except percentages) |  | Pension plans |  | Other postretirement benefits |  | Pension plans |  | Other postretirement benefits
Benefit obligation, beginning of year |  | $ | 158,323 |  |  | $ | 28,684 |  |  | $ | 83,730 |  |  | $ | 35,658 |
Service cost |  | 1,812 |  |  | 46 |  |  | 1,478 |  |  | 60 |
Interest cost |  | 6,114 |  |  | 1,416 |  |  | 5,151 |  |  | 1,874 |
Plan participants' contributions |  | 530 |  |  | — |  |  | 281 |  |  | — |
Actuarial (gain)/loss |  | (3,868) |  |  | (709) |  |  | 6,317 |  |  | (6,131) |
Benefits paid |  | (9,423) |  |  | (2,651) |  |  | (6,388) |  |  | (2,795) |
Acquisitions |  | — |  |  | — |  |  | 64,947 |  |  | — |
Settlements and curtailments |  | (7,805) |  |  | — |  |  | — |  |  | — |
Plan amendments and other |  | — |  |  | — |  |  | (1,985) |  |  | — |
Foreign currency changes |  | (8,572) |  |  | (71) |  |  | 4,792 |  |  | 18 |
Benefit obligation, end of year |  | $ | 137,111 |  |  | $ | 26,715 |  |  | $ | 158,323 |  |  | $ | 28,684 |
Accumulated benefit obligation |  | $ | 132,198 |  |  | $ | — |  |  | $ | 151,001 |  |  | $ | — |
Weighted average assumptions used to |  |  |  |  |  |  |  |
determine benefit obligations, end of year: |  |  |  |  |  |  |  |
Discount rate — U.S. plan |  | 5.44 | % |  | 5.61 | % |  | 5.15 | % |  | 5.21 | %
Discount rate — non-U.S. plans |  | 4.32 | % |  | 4.70 | % |  | 4.05 | % |  | 4.70 | %
Cash balance interest crediting rate - Switzerland pension plan |  | 1.15 | % |  | — |  |  | 1.30 | % |  | — |
Compensation increase — U.S. plan |  | N/A |  | N/A |  | N/A |  | N/A
Compensation increase — non-U.S. plans |  | 2.68 | % |  | 2.75 | % |  | 2.89 | % |  | 2.75 | %
During 2024, pension benefit obligations decreased by $21.2 million, related to several factors including benefit payments made to participants of the plan, which resulted in a decrease of $9.4 million, and foreign currency changes, which resulted in a decrease of $8.6 million, as well as several other offsetting items. Other postretirement benefit obligations decreased by $2.0 million in 2024, primarily driven by payments made by the Company to participants of the plan. During 2023, pension benefit obligations increased by $74.6 million, largely related to the acquisition of Heimbach GmbH, which resulted in an increase of $64.9 million, in addition to net actuarial losses, which resulted in an increase of $6.3 million. Other postretirement benefit obligations decreased by $7.0 million in 2023, primarily driven by net actuarial gains and payments made by the Company to participants of the plan. The following sets forth information about plan assets:
|  | As of December 31, 2024 |  | As of December 31, 2023
(in thousands) |  | Pension plans |  | Other postretirement benefits |  | Pension plans |  | Other postretirement benefits
Fair value of plan assets, beginning of year |  | $ | 112,688 |  |  | $ | — |  |  | $ | 74,929 |  |  | $ | — |
Actual return on plan assets, net of expenses |  | (408) |  |  | — |  |  | 6,285 |  |  | — |
Employer contributions |  | 8,744 |  |  | 2,651 |  |  | 3,629 |  |  | 2,795 |
Plan participants' contributions |  | 530 |  |  | — |  |  | 281 |  |  | — |
Benefits paid |  | (9,423) |  |  | (2,651) |  |  | (6,388) |  |  | (2,795) |
Acquisitions |  | — |  |  | — |  |  | 30,941 |  |  | — |
Settlements |  | (3,811) |  |  | — |  |  | — |  |  | — |
Other |  | — |  |  | — |  |  | (832) |  |  | — |
Foreign currency changes |  | (5,183) |  |  | — |  |  | 3,843 |  |  | — |
Fair value of plan assets, end of year |  | $ | 103,137 |  |  | $ | — |  |  | $ | 112,688 |  |  | $ | — |
The funded status of the plans was as follows:
|  | As of December 31, 2024 |  | As of December 31, 2023
(in thousands) |  | Pension plans |  | Other postretirement benefits |  | Pension plans |  | Other postretirement benefits
Fair value of plan assets |  | $ | 103,137 |  |  | $ | — |  |  | $ | 112,688 |  |  | $ | — |
Benefit obligation |  | 137,111 |  |  | 26,715 |  |  | 158,323 |  |  | 28,684 |
Funded status |  | $ | (33,974) |  |  | $ | (26,715) |  |  | $ | (45,635) |  |  | $ | (28,684) |
Accrued benefit cost, end of year |  | $ | (33,974) |  |  | $ | (26,715) |  |  | $ | (45,635) |  |  | $ | (28,684) |
Amounts recognized in the consolidated balance sheets consist of the following: |  |  |  |  |  |  |  |
Noncurrent asset |  | $ | 16,982 |  |  | $ | — |  |  | $ | 19,296 |  |  | $ | — |
Current liability |  | (4,915) |  |  | (2,772) |  |  | (5,500) |  |  | (2,808) |
Noncurrent liability |  | (46,041) |  |  | (23,943) |  |  | (59,431) |  |  | (25,876) |
Net amount recognized |  | $ | (33,974) |  |  | $ | (26,715) |  |  | $ | (45,635) |  |  | $ | (28,684) |
Amounts recognized in accumulated other comprehensive income consist of: |  |  |  |  |  |  |  |
Net actuarial loss |  | $ | 19,529 |  |  | $ | 1,345 |  |  | $ | 22,512 |  |  | $ | 1,991 |
Prior service cost/(credit) |  | (96) |  |  | (360) |  |  | (132) |  |  | (484) |
Net amount recognized |  | $ | 19,433 |  |  | $ | 985 |  |  | $ | 22,380 |  |  | $ | 1,507 |
The composition of the net pension plan funded status as of December 31, 2024 was as follows:
(in thousands) |  | U.S. plan |  | Non-U.S. plans |  | Total
Pension plans with pension assets |  | $ | — |  |  | $ | 16,982 |  |  | $ | 16,982 |
Pension plans without pension assets |  | (3,284) |  |  | (47,672) |  |  | (50,956) |
Total |  | $ | (3,284) |  |  | $ | (30,690) |  |  | $ | (33,974) |
The underfunded balance in the U.S. relates to the Supplemental Executive Retirement Plan. The composition of the net periodic benefit plan cost for the years ended December 31, 2024, 2023, and 2022, was as follows:
|  | Pension plans |  | Other postretirement benefits
(in thousands, except percentages) |  | 2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022
Components of net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1,812 |  |  | $ | 1,478 |  |  | $ | 1,371 |  |  | $ | 46 |  |  | $ | 60 |  |  | $ | 114 |
Interest cost |  | 6,114 |  |  | 5,151 |  |  | 4,917 |  |  | 1,416 |  |  | 1,874 |  |  | 1,221 |
Expected return on assets |  | (5,430) |  |  | (4,347) |  |  | (5,979) |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost/(credit) |  | (26) |  |  | (32) |  |  | (8) |  |  | (124) |  |  | (4,090) |  |  | (4,488) |
Amortization of net actuarial loss |  | 647 |  |  | 555 |  |  | 1,377 |  |  | (34) |  |  | 828 |  |  | 1,883 |
Settlement |  | (33) |  |  | — |  |  | 49,128 |  |  | — |  |  | — |  |  | — |
Curtailment (gain)/loss |  | (37) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost |  | $ | 3,047 |  |  | $ | 2,805 |  |  | $ | 50,806 |  |  | $ | 1,304 |  |  | $ | (1,328) |  |  | $ | (1,270) |
Weighted average assumptions used to determine net cost: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate — U.S. plan |  | 5.15 | % |  | 5.49 | % |  | 2.63 | % |  | 5.21 | % |  | 5.55 | % |  | 2.83 | %
Discount rate — non-U.S. plans |  | 4.05 | % |  | 5.15 | % |  | 2.41 | % |  | 4.70 | % |  | 5.20 | % |  | 3.05 | %
Cash balance interest crediting rate - Switzerland pension plan |  | 1.30 | % |  | 2.15 | % |  | 0.25 | % |  | — |  |  | — |  |  | — |
Expected return on plan assets — U.S. plan |  | N/A |  | N/A |  | 3.07 | % |  | N/A |  | N/A |  | N/A
Expected return on plan assets — non-U.S. plans |  | 4.98 | % |  | 5.21 | % |  | 3.31 | % |  | N/A |  | N/A |  | N/A
Rate of compensation increase — U.S. plan |  | N/A |  | N/A |  | N/A |  | N/A |  | N/A |  | N/A
Rate of compensation increase — non-U.S. plans |  | 2.89 | % |  | 3.08 | % |  | 2.70 | % |  | 2.75 | % |  | 2.75 | % |  | 2.75 | %
Pretax (gains)/losses on plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31, 2024, 2023, and 2022, was as follows:
|  | Pension plans |  | Other postretirement benefits
(in thousands) |  | 2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022
Settlements/curtailments |  | $ | 70 |  |  | $ | — |  |  | $ | (49,128) |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Asset/liability loss/(gain) |  | (2,023) |  |  | 4,365 |  |  | 16,828 |  |  | (709) |  |  | (6,131) |  |  | (6,658) |
Amortization of actuarial (loss) |  | (646) |  |  | (554) |  |  | (1,377) |  |  | 34 |  |  | (828) |  |  | (1,883) |
Amortization of prior service cost/(credit) |  | 26 |  |  | 32 |  |  | 8 |  |  | 124 |  |  | 4,090 |  |  | 3,884 |
Currency impact |  | (748) |  |  | 757 |  |  | (944) |  |  | 28 |  |  | (8) |  |  | 15 |
Cost/(benefit) in Other comprehensive income |  | $ | (3,321) |  |  | $ | 4,600 |  |  | $ | (34,613) |  |  | $ | (523) |  |  | $ | (2,877) |  |  | $ | (4,642) |
Investment Strategy Our investment strategy for pension assets differs for the various countries in which we have defined benefit pension plans. Some of our defined benefit plans do not require funded trusts and, in those arrangements, the Company funds the plans on a “pay as you go” basis. The largest of the funded defined benefit plans are in Canada and the United Kingdom. For the countries in which the Company has funded pension trusts, the investment strategy may also be liability driven or, in other cases, to achieve a competitive, total investment return, achieving diversification between and within asset classes and managing other risks. Investment objectives for each asset class are determined based on specific risks and investment opportunities identified. Actual allocations to each asset class vary from target allocations due to periodic investment strategy changes, market value fluctuations, the length of time it takes to fully implement investment allocation positions, and the timing of benefit payments and contributions. Fair-Value Measurements The following tables present plan assets as of December 31, 2024, and 2023, using the fair-value hierarchy, which has three levels based on the reliability of inputs used, as described in Note 18, Fair-Value Measurements, of the Notes to the Consolidated Financial Statements. Certain investments that are measured at fair value using net asset value ("NAV") as a practical expedient are not required to be categorized in the fair value hierarchy table. The total fair value of these investments is included in the table below to permit reconciliation of the fair value hierarchy to amounts presented in the funded status table above. As of December 31, 2024 and 2023, there were no investments expected to be sold at a value materially different than NAV.
|  | Assets at Fair Value as of December 31, 2024
(in thousands) |  | Quoted prices in active markets Level 1 |  | Significant other observable inputs Level 2 |  | Significant unobservable inputs Level 3 |  | Total
Common Stocks and equity funds |  | $ | — |  |  | $ | 4,241 |  |  | $ | — |  |  | $ | 4,241 |
Debt securities |  | — |  |  | 49,940 |  |  | — |  |  | 49,940 |
Insurance contracts |  | — |  |  | — |  |  | 3,528 |  |  | 3,528 |
Real Estate |  | — |  |  | — |  |  | 3,244 |  |  | 3,244 |
Hedge Funds |  | — |  |  | — |  |  | 836 |  |  | 836 |
Cash and short-term investments |  | 5,323 |  |  | — |  |  | — |  |  | 5,323 |
Total investments in the fair value hierarchy |  | $ | 5,323 |  |  | $ | 54,181 |  |  | $ | 7,608 |  |  | 67,112 |
Investments at net asset value: |  |  |  |  |  |  |  |
Common Stocks and equity funds |  |  |  |  |  |  |  | 13,124 |
Fixed income funds |  |  |  |  |  |  |  | 22,901 |
Limited partnerships |  |  |  |  |  |  |  | — |
Total plan assets |  |  |  |  |  |  |  | $ | 103,137 |
|  | Assets at Fair Value as of December 31, 2023
(in thousands) |  | Quoted prices in active markets Level 1 |  | Significant other observable inputs Level 2 |  | Significant unobservable inputs Level 3 |  | Total
Common Stocks and equity funds |  | $ | — |  |  | $ | 4,159 |  |  | $ | — |  |  | $ | 4,159 |
Debt securities |  | — |  |  | 56,838 |  |  | — |  |  | 56,838 |
Insurance contracts |  | — |  |  | — |  |  | 3,478 |  |  | 3,478 |
Real Estate |  | — |  |  | — |  |  | 3,451 |  |  | 3,451 |
Hedge Funds |  | — |  |  | — |  |  | 668 |  |  | 668 |
Cash and short-term investments |  | 5,740 |  |  | — |  |  | — |  |  | 5,740 |
Total investments in the fair value hierarchy |  | $ | 5,740 |  |  | $ | 60,997 |  |  | $ | 7,597 |  |  | 74,334 |
Investments at net asset value: |  |  |  |  |  |  |  |
Common Stocks and equity funds |  |  |  |  |  |  |  | 12,608 |
Fixed income funds |  |  |  |  |  |  |  | 25,746 |
Limited partnerships |  |  |  |  |  |  |  | — |
Total plan assets |  |  |  |  |  |  |  | $ | 112,688 |
The following tables present a reconciliation of Level 3 assets held during the years ended December 31, 2024 and 2023:
(in thousands) |  | December 31, 2023 |  | Net realized gains |  | Net unrealized gains |  | Net purchases, issuances and settlements |  | Net transfers (out of) Level 3 |  | December 31, 2024
Insurance contracts - |  |  |  |  |  |  |  |  |  |  |  |
total level 3 assets |  | $ | 7,597 |  |  | $ | — |  |  | $ | 58 |  |  | $ | (47) |  |  | $ | — |  |  | $ | 7,608 |
(in thousands) |  | December 31, 2022 |  | Net realized gains |  | Net unrealized gains |  | Net purchases, issuances and settlements |  | Net transfers (out of) Level 3 |  | December 31, 2023
Insurance contracts - |  |  |  |  |  |  |  |  |  |  |  |
total level 3 assets |  | $ | 2,418 |  |  | $ | — |  |  | $ | 18 |  |  | $ | 5,161 |  |  | $ | — |  |  | $ | 7,597 |
None of the Company's U.S. pension plans held assets during 2024 or 2023. The asset allocation for the Company’s non-U.S. pension plans for 2024 and 2023, and the target allocation, by asset category, are as follows:
|  | Non-U.S. Plans
|  | Target Allocation |  | Percentage of plan assets at plan measurement date
Asset category |  |  | 2024 |  | 2023
Equity securities |  | 15 | % |  | 15 | % |  | 13 | %
Debt securities |  | 70 | % |  | 70 | % |  | 73 | %
Real estate |  | 3 | % |  | 3 | % |  | 3 | %
Other(1) |  | 12 | % |  | 12 | % |  | 11 | %
|  | 100 | % |  | 100 | % |  | 100 | %
(1)Other includes hedged equity and absolute return strategies, as well as private equity. The Company has procedures to closely monitor the performance of these investments and compares asset valuations to audited financial statements of the funds. The targeted plan asset allocation is based on an analysis of the actuarial liabilities, a review of viable asset classes, and an analysis of the expected rate of return, risk, and other investment characteristics of various investment asset classes. At the end of 2024 and 2023, the projected benefit obligation, accumulated benefit obligation, and fair value of plan assets for pension plans with projected benefit obligation and an accumulated benefit obligation in excess of plan assets were as follows:
|  | Plans with projected benefit obligation in excess of plan assets
(in thousands) |  | 2024 |  | 2023
Projected benefit obligation |  | $ | 55,067 |  |  | $ | 81,972 |
Fair value of plan assets |  | 4,111 |  |  | 17,041 |
|  | Plans with accumulated benefit obligation in excess of plan assets
(in thousands) |  | 2024 |  | 2023
Accumulated benefit obligation |  | $ | 52,493 |  |  | $ | 77,688 |
Fair value of plan assets |  | 3,509 |  |  | 17,041 |
Information about expected cash flows for the pension and other benefit obligations are as follows:
(in thousands) |  | Pension plans |  | Other postretirement benefits
Expected employer contributions and direct employer payments in the next fiscal year |  | $ | 5,707 |  |  | $ | 2,772 |
Expected benefit payments |  |  |  |
2025 |  |  | 10,249 |  |  | 2,772 |
2026 |  |  | 10,244 |  |  | 2,672 |
2027 |  |  | 9,732 |  |  | 2,573 |
2028 |  |  | 9,963 |  |  | 2,474 |
2029 |  |  | 9,855 |  |  | 2,375 |
2030 to 2034 (expected, combined) |  | 49,316 |  |  | 10,418 |

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