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Commitments and Contingencies (Reconciliation of Changes in Product Warranty and Recall Liability) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Commitments and Contingencies [Abstract]    
Product warranty and recall at beginning of period $ 9,978 $ 9,344
Accruals for products shipped during period 2,274 1,503
Acquired warranty liability related to acquisition   1,462
Aggregate changes in pre-existing liabilities due to claim developments 387 1,572
Settlements made during the period (1,772) (2,314)
Foreign currency translation (19) 97
Product warranty and recall at end of period $ 10,848 $ 11,664