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Contingent Liabilities (Narrative) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($) item | Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |
Minimum limit of per claim for providing insurance coverage on annual basis | $ | $ 5,000 |  |
Maximum limit of aggregate loss incurred annually for providing insurance coverage on annual basis | $ | 10,000 |  |
Total amount of damages claimed | $ | 1,100 | $ 100 |
Total Product Liability Expense | $ | $ 1,139 | $ 718 | $ 1,514
Number of new lawsuits | 1 | 2 |
Number of settled lawsuits | 1 | 3 |
Number of defendants | 3 | 3 |
Traditional Lawsuits [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of defendants | 2 | 2 |
Municipal Lawsuits [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of defendants | 1 | 1 |

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- Definition Represents maximum limit of aggregate loss incurred annually for providing insurance coverage on annual basis excluding for certain new claims from governments or municipalities. + References No definition available. + Details
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- Definition Represents minimum limit of per claim for providing insurance coverage on annual basis. + References No definition available. + 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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- Definition Number of claims settled. + References No definition available. + Details
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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 3: 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=121557415&loc=d3e14326-108349 + Details
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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
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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=121557415&loc=d3e14326-108349 + Details
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