Annual report pursuant to Section 13 and 15(d)

Pension and Other Postretirement Benefits - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details)

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Pension and Other Postretirement Benefits - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Net actuarial (gain) loss $ (1,990) $ 1,626 $ 530
Recognized actuarial loss (144) (66) (46)
Total recognized in other comprehensive loss, before taxes (2,134) 1,560 484
Total recognized in net benefit cost and other comprehensive loss, before taxes $ 978 $ 3,217 $ 1,029