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Contingent Liabilities (Reconciliation of Product Liability Reserve) (Details) - Product Liability Reserve [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Period | [1] | $ 1,819 | $ 744 | $ 845
Accrued Legal Expense (Income) | [2] | (477) | 1,221 | (77)
Legal Fees | [3] | (290) | (133) | (18)
Settlements | [4] | (233) | (13) | (6)
Balance at End of Period | [1] | $ 819 | $ 1,819 | $ 744
[1] | The beginning and ending liability balances represent accrued legal fees only. Settlements and administrative costs are expensed as incurred. Only in rare instances is an accrual established for settlements.
[2] | 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.
[3] | Legal fees represent payments to outside counsel related to product liability matters.
[4] | Settlements represent payments made to plaintiffs or allegedly injured parties in exchange for a full and complete release of liability.

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + 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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