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Summary of Significant Accounting Policies (Schedule of Product Warranty Liability) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Summary of Significant Accounting Policies    
Product warranty and recall at beginning of period $ 10,796 $ 10,494
Accruals for warranties established during period 5,898 7,131
Aggregate changes in pre-existing liabilities due to claim developments 1,794 1,037
Settlements made during the period (6,297) (7,600)
Foreign currency translation 500 (266)
Product warranty and recall at end of period $ 12,691 $ 10,796