Annual report pursuant to Section 13 and 15(d)

Benefit Plans - Net Periodic Benefit Cost (Details)

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Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Pension Plans | United States      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)      
Service cost $ 0 $ 0 $ 769
Interest cost 2,569 2,210 2,665
Expected return on plan assets (3,433) (4,360) (3,898)
Amortization of net (gain) loss 0 0 0
Settlement (gain) loss recognized 38 (26) 78
Net periodic expense (benefit) (826) (2,176) (386)
Defined Benefit Pension Plans | Foreign      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)      
Service cost   0 1,080
Interest cost   255 299
Expected return on plan assets   (255) (287)
Amortization of net (gain) loss   0 95
Settlement (gain) loss recognized   2,084 0
Net periodic expense (benefit)   2,084 1,187
Other Postretirement Benefits Plans      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)      
Interest cost 18 17 19
Amortization of prior service credit (210) (232) (232)
Amortization of net (gain) loss 3 5 1
Net periodic expense (benefit) $ (189) $ (210) $ (212)