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Warranties (Schedule of Warranty Liability and Related Activity) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Product Warranties Disclosures [Abstract]    
Beginning balance $ 934 $ 520
Warranty provisions 203 209
Warranty claims (268) (550)
Adjustments to preexisting warranties 37 467
Ending balance $ 906 $ 646