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Contingent Liabilities (Schedule of Product Liability Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Product Liability Contingency [Line Items]      
Total Product Liability Expense $ 1,253 $ 177 $ 1,617
Accrued Legal Expense [Member]
      
Product Liability Contingency [Line Items]      
Total Product Liability Expense 230 [1] (633) [1] 755 [1]
Insurance Premium Expense [Member]
      
Product Liability Contingency [Line Items]      
Total Product Liability Expense $ 1,023 [2] $ 810 [2] $ 862 [2]
[1] The expense accrued in the liability is for legal fees only. In 2010 and 2012, the costs incurred related to cases that were settled or dismissed were less than the amounts accrued for these cases in prior years.
[2] Insurance expense represents the cost of insurance premiums.