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Comprehensive Loss - Reclassifications out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance $ 24,522 $ 29,666 $ 25,532 $ 30,566
Balance 25,689 29,117 25,689 29,117
Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (1,476) 195 (920) (15)
Other comprehensive income (loss) before reclassifications, net of taxes 228 (252) (435) 35
Total other comprehensive income (loss) before reclassifications, net of taxes (1,248) (57) (1,355) 20
Net amount reclassified to earnings 38 (41) 145 (118)
Balance (1,210) (98) (1,210) (98)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (28) 1,374 (53) 1,451
Total other comprehensive income (loss) before reclassifications, net of taxes (28) 1,374 (53) 1,451
Net amount reclassified to earnings (1) (41) 24 (118)
Balance (29) 1,333 (29) 1,333
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (51)   33  
Other comprehensive income (loss) before reclassifications, net of taxes 12   (154)  
Total other comprehensive income (loss) before reclassifications, net of taxes (39)   (121)  
Net amount reclassified to earnings 39   121  
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (1,397) (1,179) (900) (1,466)
Other comprehensive income (loss) before reclassifications, net of taxes 216 (252) (281) 35
Total other comprehensive income (loss) before reclassifications, net of taxes (1,181) (1,431) (1,181) (1,431)
Balance $ (1,181) $ (1,431) $ (1,181) $ (1,431)