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RETIREMENT PLAN BENEFIT LIABILITY
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
RETIREMENT PLAN BENEFIT LIABILITY

17. RETIREMENT PLAN BENEFIT LIABILITY:

On March 18, 2010, the Human Capital Committee and the Board of Directors of the Company approved and adopted the Universal Display Corporation Supplemental Executive Retirement Plan (SERP). The SERP is currently unfunded and includes salary and bonus as part of the plan. The purpose of the SERP is to provide certain of the Company’s key employees with supplemental pension benefits following a cessation of their employment and to encourage their continued employment with the Company. As of March 31, 2025, there were seven participants in the SERP. In December 2022, one of the participants retired and monthly SERP benefit payments commenced in January 2023. The total SERP benefit payments for the three months ended March 31, 2025 were $504,000.

The Company records amounts relating to the SERP based on calculations that incorporate various actuarial and other assumptions, including discount rates, rate of compensation increases, retirement dates and life expectancies. The net periodic costs are recognized as employees render the services necessary to earn the SERP benefits.

The components of net periodic pension cost were as follows (in thousands):

 

 

 

Three Months Ended March 31,

 

 

 

2025

 

 

2024

 

Service cost

 

$

225

 

 

$

212

 

Interest cost

 

 

696

 

 

 

610

 

Amortization of prior service cost

 

 

6

 

 

 

11

 

Total net periodic benefit cost

 

$

927

 

 

$

833