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Benefit Plans And Obligations For Termination Indemnity (Narrative) (Details) | 1 Months Ended | 12 Months Ended |
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Dec. 31, 2025 USD ($) subsidiary | Dec. 31, 2025 USD ($) subsidiary plan | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jul. 31, 2025 USD ($)
Retirement Benefits [Abstract] |  |  |  |  |
Defined Benefit Plan, Number Of Plans | plan |  | 5 |  |  |
Defined Benefit Plan, Number of Subsidiaries | subsidiary | 2 | 2 |  |  |
Assets for plan benefits, defined benefit plan |  |  |  |  | $ 30,256,000
Non-operating settlement benefit | $ 10,200,000 |  |  |  |
Eligibility age for normal retirement benefit plan, in years |  | 65 years |  |  |
Lump sum based on employee contribution percentage to certain breakpoint |  | 2.00% |  |  |
Additional percentage exceeding the breakpoint |  | 6.00% |  |  |
Maximum percentage of pensionable salary |  | 5.00% |  |  |
Maximum employer contributions, in years |  | 40 years |  |  |
Expected benefit payments, 2014 | 80,000 | $ 80,000 |  |  |
Expected benefit payments, 2015 | 78,000 | 78,000 |  |  |
Expected benefit payments, 2016 | 87,000 | 87,000 |  |  |
Expected benefit payments, 2017 | 84,000 | 84,000 |  |  |
Expected benefit payments, 2018 | 82,000 | 82,000 |  |  |
Total expense |  | $ 18,008,000 | $ 18,582,000 | $ 16,961,000 |
Salary and bonus defer percentage under the plan |  | 100.00% |  |  |
Amount on the dollar ESA matches up to 10% of employees total salary |  | $ 0.00005 |  |  |
ESA offers, maximum percentage |  | 10.00% |  |  |
Participant contributions transferred into the plan |  | $ 2,353,000 | $ 1,558,000 | $ 2,418,000 |
ESA contribution to the plan |  | 235,000 |  |  |
Cash surrender value of the life insurance policies | 8,175,000 | 8,175,000 |  |  |
Non-qualified defined contribution plan liabilitiy | 22,443,000 | 22,443,000 |  |  |
Plan assets of life insurance policies, cash surrender | $ 4,796,000 | 4,796,000 |  |  |
Related liability, pension payments |  | $ 10,946,000 |  |  |

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