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Comprehensive Income (Loss) - Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Comprehensive Income (Loss)        
Net earnings $ 3,820 $ (8,883) $ 5,145 $ (7,721)
Foreign currency translation adjustments 176 1,590 33 (968)
Pension liability, net of tax of $65, $52, $129, and $100, respectively 182 144 365 282
Total comprehensive income (loss) $ 4,178 $ (7,149) $ 5,543 $ (8,407)