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Employee Benefit Plans - Change in fair value of plan assets (Details) - Foreign Plan - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Change in fair value of plan assets    
Fair value of plan assets, beginning balance $ 17,394 $ 17,290
Employee contributions 437 499
Actual return on plan assets (288) 46
Benefits (paid), net of transfers (2,361) (492)
Employer contributions 911 1,049
Foreign exchange adjustment (678) (998)
Fair value of plan assets, ending balance $ 15,415 $ 17,394