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Contingent Liabilities (Reconciliation of Product Liability Reserve) (Details) - Product Liability Reserve [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period [1] $ 1,172 $ 819 $ 1,819
Accrued Legal Expense (Income) [2] (37) 731 (477)
Legal Fees [3] (240) (183) (290)
Settlements [4] (77) (195) (233)
Balance at End of Period [1] $ 818 $ 1,172 $ 819
[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 2017 and 2019, 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.