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Contingent Liabilities (Schedule of Product Liability Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Product Liability Contingency [Line Items] |  |  |  |
Total Product Liability Expense |  | $ 1,514 | $ 360 | $ 2,055
Accrued Legal Expense [Member] |  |  |  |
Product Liability Contingency [Line Items] |  |  |  |
Total Product Liability Expense | [1] | 731 | (477) | 1,221
Product Insurance Premium Expense [Member] |  |  |  |
Product Liability Contingency [Line Items] |  |  |  |
Total Product Liability Expense | [2] | $ 783 | $ 837 | $ 834
[1] | The expense accrued in the liability is for legal fees only. In 2015 and 2017, 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.

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- Definition The amount of loss reported during the period pertaining to product liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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