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Commitments and Contingencies (Reconciliation of Changes in Product Warranty and Recall Liability) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Commitments and Contingencies [Abstract]    
Product warranty and recall at beginning of period $ 7,601 $ 6,414
Accruals for products shipped during period 1,699 2,217
Aggregate changes in pre-existing liabilities due to claim developments (115) 244
Settlements made during the period (3,154) (1,534)
Product warranty and recall at end of period $ 6,031 $ 7,341