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Summary of Significant Accounting Policies (Schedule of Product Warranty Liability) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]    
Product warranty and recall at beginning of period $ 7,601 $ 6,414
Accruals for products shipped during period 4,609 4,484
Aggregate changes in pre-existing liabilities due to claim developments (156) 692
Settlements made during the period (5,635) (3,989)
Product warranty and recall at end of period $ 6,419 $ 7,601