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Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 1,835 $ 1,528
Product warranty adjustments 1,220 1,033
Payments and settlements (1,058) (726)
Ending balance $ 1,997 $ 1,835