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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]        
Net Income (Loss) $ (10,427) $ 5,481 $ (4,445) $ (3,736)
Other Comprehensive Income (Loss), net of tax        
Net unrealized gain (loss) on available-for-sale securities (61) (45) (348) 445
Defined benefit plan adjustments 124 244 435 576
Foreign currency translation (1,389) 2,469 (2,914) 2,718
Other Comprehensive Income (Loss), net of tax (1,326) 2,668 (2,827) 3,739
Comprehensive Income (Loss), net of tax $ (11,753) $ 8,149 $ (7,272) $ 3