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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, 2017
Mar. 31, 2016
Commitments and Contingencies [Abstract]    
Product warranty and recall at beginning of period $ 9,344 $ 6,419
Accruals for products shipped during period 1,524 1,358
Acquired warranty liability related to acquisition 1,462  
Aggregate changes in pre-existing liabilities due to claim developments 1,614 (302)
Settlements made during the period (2,281) (348)
Product warranty and recall at end of period $ 11,663 $ 7,127