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EMPLOYEE BENEFIT PLANS
 9 Months Ended
Sep. 30, 2022
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
We have a defined benefit pension plan covering certain United Kingdom employees (the “U.K. Plan”). Net periodic pension credit includes the following components (in thousands):
 Three Months Ended September 30,Nine Months Ended September 30,
 2022202120222021
(unaudited)(unaudited)(unaudited)(unaudited)
Interest cost$358 $322 1,171 $970 
Expected return on plan assets(533)(504)(1,744)(1,515)
Amortization of prior service cost7 9 23 26 
Net periodic pension credit$(168)$(173)$(550)$(519)

The expected long-term rate of return on invested assets is determined based on the weighted average of expected returns on asset investment categories for the U.K. Plan as follows: 2.1% overall, 4.6% for equities and 1.4% for debt securities. We
expect to contribute $3.9 million to the U.K. Plan for 2022, of which $2.7 million has been contributed through September 30, 2022.